AVTR

SEC source: 0001722482-20-000150 · wf-form4_159649110332268.xml · derivative · entry 3

Ohri Devashish · CIK 0001776125 · EVP, IMEA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 53,440

Underlying: Common Stock · 35,000 shares

Expires 2024-09-18

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: These options are fully vested.

SEC source: 0001722482-20-000150 · wf-form4_159649110332268.xml · nonDerivative · entry 2

Ohri Devashish · CIK 0001776125 · EVP, IMEA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 151,671

F1 · kind: The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person.

F2 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions ranging from $21.00 to $21.82, inclusive. The Reporting Person undertakes 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.

SEC source: 0001722482-20-000150 · wf-form4_159649110332268.xml · nonDerivative · entry 1

Ohri Devashish · CIK 0001776125 · EVP, IMEA

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 186,671

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 30

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,861,148

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 29

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,861,086

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 28

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,874,490

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 27

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,876,496

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 26

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,876,149

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 25

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,875,713

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 24

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,713

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 30

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,861,148

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 29

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,861,086

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 28

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,874,490

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 27

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,876,496

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 26

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,876,149

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 25

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,875,713

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 24

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,713

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 23

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,883,342

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 22

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,883,286

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 21

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,882,183

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 20

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,836

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 19

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,436

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 18

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,884,852

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 17

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,252

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 23

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,883,342

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 22

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,883,286

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 21

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,882,183

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 20

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,836

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 19

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,436

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 18

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,884,852

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 17

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,885,252

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 16

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,208

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 15

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,228

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 16

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,208

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 15

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,228

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 14

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,889

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 13

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,738

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 14

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,889

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 13

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,738

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 12

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,411

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 11

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,711

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 12

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,411

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 11

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,711

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 10

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,433

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 9

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,462

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 10

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,433

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 9

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,462

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 8

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,467

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058162 · doc4a.xml · nonDerivative · entry 7

Natauri Jo · CIK 0001776123 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,469

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc. (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · balance_after: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F3 · ownership.nature: The Reporting Person is a managing director of Goldman Sachs. Goldman Sachs is a direct subsidiary of The Goldman Sachs Group, Inc. ("GS Group"). The Reporting Person disclaims beneficial ownership of the securities reported herein except to the extent of her pecuniary interest therein, if any, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F4 · ownership.nature: The Reporting Person is currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.

SEC source: 0001209191-20-058160 · doc4a.xml · nonDerivative · entry 8

GOLDMAN SACHS & CO. LLC · CIK 0000769993 · 10% owner

StoneBridge 2017, L.P. · CIK 0001698772 · 10% owner

StoneBridge 2017 Offshore, L.P. · CIK 0001698770 · 10% owner

VWR Partners, L.P. · CIK 0001708241 · 10% owner

Broad Street Principal Investments, L.L.C. · CIK 0001575993 · 10% owner

Bridge Street Opportunity Advisors, L.L.C. · CIK 0001615636 · 10% owner

GOLDMAN SACHS GROUP INC · CIK 0000886982 · 10% owner

StoneBridge 2018, L.P. · CIK 0001729502 · 10% owner

StoneBridge 2018 Offshore, L.P. · CIK 0001729503 · 10% owner

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

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnotes

Disclosed balance after: 58,881,467

F1 · security: Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b), the amount of profit potentially recoverable by Avantor, Inc (the "Issuer") from the reported transactions has been remitted to the Issuer.

F2 · security: These transactions in the Issuer's common stock (the "Common Stock") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.

F3 · security: This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".

F4 · balance_after: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · balance_after: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F4 · ownership.nature: Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.

F5 · ownership.nature: Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.

F6 · ownership.nature: Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

F7 · ownership.nature: The Reporting Persons are currently analyzing additional trading activity in the Issuer's equity securities and, if necessary, will file another Form 4 as promptly as reasonably practicable once that analysis is complete.