EAF

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,689,960

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F8 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,470,447 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,761,631 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,240,814 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,727,071

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,747,950

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,689,960

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F8 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,470,447 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,761,631 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,240,814 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,727,071

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,747,950

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,689,960

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F8 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,470,447 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,761,631 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,240,814 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,727,071

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,747,950

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.19 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,767,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,834,543

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024010 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,872,108

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,767,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,834,543

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024009 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,872,108

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,767,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,834,543

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-024011 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,872,108

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.29 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F9 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F10 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F11 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F12 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F13 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 9

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,907,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F11 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,525,937 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,820,075 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,344,694 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 8

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,974,066

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 7

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,011,362

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 9

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,907,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F11 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,525,937 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,820,075 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,344,694 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 8

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,974,066

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 7

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,011,362

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 9

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,907,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F11 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,525,937 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,820,075 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,344,694 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 8

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 170,974,066

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 7

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,011,362

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.13 to $7.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,046,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,114,020

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,151,853

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,046,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,114,020

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,151,853

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 6

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,046,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F7 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 5

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,114,020

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F6 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 4

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,151,853

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F5 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.05 to $7.13 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,187,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,207,726

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023700 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,218,951

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,187,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,207,726

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023702 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,218,951

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 3

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,187,774

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F4 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 2

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,207,726

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F3 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023698 · form4.xml · nonDerivative · entry 1

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

BROOKFIELD ASSET MANAGEMENT INC. · CIK 0001001085 · Director · 10% owner

Brookfield Capital Partners Ltd. · CIK 0001685158 · Director · 10% owner

BPE IV (Non-Cdn) · CIK 0001738295 · Director · 10% owner

BCP IV GrafTech Holdings L.P. · CIK 0001642338 · Director · 10% owner

Brookfield Business Partners L.P. · CIK 0001654795 · Director · 10% owner

Brookfield Private Equity Group Holdings LP · CIK 0001685157 · Director · 10% owner

Brookfield Private Equity Inc. · CIK 0001685113 · Director · 10% owner

Brookfield Private Equity Holdings LLC · CIK 0001703248 · Director · 10% owner

Brookfield US Inc. · CIK 0001768973 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,218,951

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.10 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023469 · form4.xml · nonDerivative · entry 9

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,229,609

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.16 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F11 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,607,928 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,906,429 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,498,184 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023469 · form4.xml · nonDerivative · entry 8

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,274,504

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.16 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023469 · form4.xml · nonDerivative · entry 7

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield Private Funds Holdings Inc. · CIK 0001504723 · Director · 10% owner

Brookfield BBP Canadian GP L.P. · CIK 0001819104 · Director · 10% owner

Brookfield Business L.P. · CIK 0001819046 · Director · 10% owner

Brookfield Business Partners Ltd · CIK 0001819045 · Director · 10% owner

BCP IV (US Plan) LP · CIK 0001819076 · Director · 10% owner

BCP IV (UK Plan) LP · CIK 0001819087 · Director · 10% owner

BCP IV (Cdn Plan) LP · CIK 0001819093 · Director · 10% owner

BCP IV Bermuda Investor LP · CIK 0001819102 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,299,762

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F8 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of BPE IV (Non-Cdn) GP LP in multiple transactions at prices ranging from $7.00 to $7.16 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023471 · form4.xml · nonDerivative · entry 9

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,229,609

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F10 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP Canada Holdings Inc. in multiple transactions at prices ranging from $7.00 to $7.16 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F11 · balance_after: Following the Sales, consists of (i) 149,216,541 shares of Common Stock held directly by BCP IV GrafTech Holdings LP; (ii) 5,607,928 shares of Common Stock held directly by BPE IV (Non-Cdn) GP LP, for itself and as nominee for BCP IV (US Plan) LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP; (iii) 5,906,429 shares of Common Stock held directly by Brookfield BBP (Canada) L.P.; (iv) 10,498,184 shares of Common Stock held directly by Brookfield BBP Canada Holdings Inc.; and (v) 527 shares of Common Stock held directly by Brookfield Private Funds Holdings Inc.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.

SEC source: 0001140361-20-023471 · form4.xml · nonDerivative · entry 8

BCP GP Ltd · CIK 0001685160 · Director · 10% owner

Brookfield BBP (Canada) L.P. · CIK 0001819406 · Director · 10% owner

Brookfield BBP Canada Holdings Inc. · CIK 0001819405 · Director · 10% owner

Brookfield CanGP Ltd · CIK 0001819217 · Director · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · See Explanation of Responses

Disclosed balance after: 171,274,504

F1 · shares: The sales reported in this Form 4 (the "Sales") were effected pursuant to a Rule 10b5-1 trading plan adopted by BPE IV (Non-Cdn) GP LP, Brookfield BBP (Canada) L.P. and Brookfield BBP Canada Holdings Inc.

F9 · price: The price reported in Column 4 is a weighted average price. These shares were sold on behalf of Brookfield BBP (Canada) L.P. in multiple transactions at prices ranging from $7.00 to $7.16 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F12 · ownership.nature: Brookfield Asset Management Inc., by virtue of its relationships with these entities, may be deemed to share beneficial ownership of all of these shares.

F13 · ownership.nature: BPE IV (Non-Cdn) GP LP, Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV GrafTech Holdings LP, may be deemed to share beneficial ownership in the shares held directly by BCP IV GrafTech Holdings LP. Brookfield Capital Partners Ltd., BCP GP Limited, Brookfield Private Equity Group Holdings LP, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BPE IV (Non-Cdn) GP LP, BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP for itself and as nominee for BCP IV (UK Plan) LP, BCP IV (Cdn Plan) LP and BCP IV Bermuda Investor LP.

F14 · ownership.nature: Brookfield Private Equity Holdings LLC, Brookfield US Inc. and Brookfield Asset Management Inc., by virtue of their relationships with BCP IV (US Plan) LP, may be deemed to share beneficial ownership in the shares held directly by BPE IV (Non-Cdn) GP LP as nominee for BCP IV (US Plan) LP. Brookfield BBP Canadian GP L.P., Brookfield CanGP Limited, Brookfield Private Equity Inc. and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP (Canada) L.P., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP (Canada) L.P.

F15 · ownership.nature: Brookfield Business L.P., Brookfield Business Partners L.P., Brookfield Business Partners Limited and Brookfield Asset Management Inc., by virtue of their relationships with Brookfield BBP Canada Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield BBP Canada Holdings Inc. Brookfield Asset Management Inc., by virtue of its relationship with Brookfield Private Funds Holdings Inc., may be deemed to share beneficial ownership in the shares held directly by Brookfield Private Funds Holdings Inc.

F16 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any of the Reporting Persons is a beneficial owner of such securities for the purpose of Section 16 of the Exchange Act, or for any other purpose.