ATI

SEC source: 0001209191-22-017657 · doc4.xml · nonDerivative · entry 1

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 170,338.4191

F1 · shares: Shares sold pursuant to a 10b5-1 Trading Plan.

F2 · balance_after: This amount includes 1995.007 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,677 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-014563 · doc4.xml · nonDerivative · entry 1

Powers Elizabeth C · CIK 0001332656 · Senior VP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 167,578.0351

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

F3 · balance_after: This amount includes 1,916.2286 shares of common stock that Ms. Powers owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Ms. Powers holds approximately 1,610 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-014565 · doc4.xml · nonDerivative · entry 1

Schwartz Karl D · CIK 0001498160 · VP, Controller & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,832.5607

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

F3 · balance_after: This amount includes 6,176.5067 shares of common stock that Mr. Schwartz owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Schwartz holds approximately 5,190.5135 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-014566 · doc4.xml · nonDerivative · entry 1

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 378,753.3409

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-014561 · doc4.xml · nonDerivative · entry 1

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 180,338.4191

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

F3 · balance_after: This amount includes 1,995.007 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,677 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-014560 · doc4.xml · nonDerivative · entry 1

Harris Timothy J · CIK 0001776844 · Senior VP and CDIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 85,287

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019 that vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-014557 · doc4.xml · nonDerivative · entry 1

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 209,392.4709

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-014559 · doc4.xml · nonDerivative · entry 1

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 127,148

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019 that vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-021126 · doc4a.xml · nonDerivative · entry 1

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 127,930

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019 that vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-021137 · doc4a.xml · nonDerivative · entry 1

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 380,560.3409

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded in 2019. One-third of such restricted stock units vested by their terms on February 28, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 28, 2022.

SEC source: 0001209191-22-013673 · doc4.xml · nonDerivative · entry 3

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 383,417.3409

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013673 · doc4.xml · nonDerivative · entry 2

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 392,775.3409

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013673 · doc4.xml · nonDerivative · entry 1

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 400,522.3409

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-013663 · doc4.xml · nonDerivative · entry 3

Powers Elizabeth C · CIK 0001332656 · Senior VP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 169,677.0351

F5 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 1,916.2286 shares of common stock that Ms. Powers owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Ms. Powers holds approximately 1,610 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013663 · doc4.xml · nonDerivative · entry 2

Powers Elizabeth C · CIK 0001332656 · Senior VP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 172,017.0351

F3 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 1,916.2286 shares of common stock that Ms. Powers owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Ms. Powers holds approximately 1,610 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013663 · doc4.xml · nonDerivative · entry 1

Powers Elizabeth C · CIK 0001332656 · Senior VP, CHRO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 175,504.0351

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

F2 · balance_after: This amount includes 1,916.2286 shares of common stock that Ms. Powers owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Ms. Powers holds approximately 1,610 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013666 · doc4.xml · nonDerivative · entry 3

Schwartz Karl D · CIK 0001498160 · VP, Controller & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 68,168.5607

F5 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 6,176.5067 shares of common stock that Mr. Schwartz owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Schwartz holds approximately 5,190.5135 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013666 · doc4.xml · nonDerivative · entry 2

Schwartz Karl D · CIK 0001498160 · VP, Controller & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,185.5607

F3 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 6,176.5067 shares of common stock that Mr. Schwartz owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Schwartz holds approximately 5,190.5135 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013666 · doc4.xml · nonDerivative · entry 1

Schwartz Karl D · CIK 0001498160 · VP, Controller & CAO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,770.5607

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

F2 · balance_after: This amount includes 6,176.5067 shares of common stock that Mr. Schwartz owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Schwartz holds approximately 5,190.5135 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013654 · doc4.xml · nonDerivative · entry 3

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 182,600.4191

F5 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 1,995.007 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,677 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013654 · doc4.xml · nonDerivative · entry 2

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 184,987.4191

F3 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F4 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

F2 · balance_after: This amount includes 1,995.007 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,677 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013654 · doc4.xml · nonDerivative · entry 1

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 188,745.4191

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

F2 · balance_after: This amount includes 1,995.007 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,677 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-013661 · doc4.xml · nonDerivative · entry 1

NEWMAN DONALD P · CIK 0001282236 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 143,528

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F1 · price: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

SEC source: 0001209191-22-013645 · doc4.xml · nonDerivative · entry 3

Harris Timothy J · CIK 0001776844 · Senior VP and CDIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 87,575

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013645 · doc4.xml · nonDerivative · entry 2

Harris Timothy J · CIK 0001776844 · Senior VP and CDIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,467

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013645 · doc4.xml · nonDerivative · entry 1

Harris Timothy J · CIK 0001776844 · Senior VP and CDIO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 91,545

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-013637 · doc4.xml · nonDerivative · entry 3

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 132,021

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013637 · doc4.xml · nonDerivative · entry 2

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 134,595

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013637 · doc4.xml · nonDerivative · entry 1

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,378

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-013633 · doc4.xml · nonDerivative · entry 3

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 211,510.4709

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013633 · doc4.xml · nonDerivative · entry 2

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 213,747.4709

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-013633 · doc4.xml · nonDerivative · entry 1

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 217,265.4709

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-021135 · doc4a.xml · nonDerivative · entry 3

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 385,013.3409

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021135 · doc4a.xml · nonDerivative · entry 2

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 393,948.3409

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021135 · doc4a.xml · nonDerivative · entry 1

WETHERBEE ROBERT S · CIK 0001572385 · Director · Board Chair, President and CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 401,344.3409

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-021132 · doc4a.xml · nonDerivative · entry 1

NEWMAN DONALD P · CIK 0001282236 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 144,137

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F1 · price: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

SEC source: 0001209191-22-021127 · doc4a.xml · nonDerivative · entry 3

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 132,583

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021127 · doc4a.xml · nonDerivative · entry 2

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 135,040

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021127 · doc4a.xml · nonDerivative · entry 1

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,697

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-021125 · doc4.xml · nonDerivative · entry 3

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 132,021

F4 · shares: Shares withheld for payment of taxes on restricted stock units awarded on February 24, 2020. One-third of such restricted stock units vested by their terms on February 24, 2022.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021125 · doc4.xml · nonDerivative · entry 2

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 134,595

F2 · shares: Shares withheld for payment of taxes in connection with the February 24, 2022 settlement of the 2019-2021 PSUs.

F3 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on February 24, 2022.

SEC source: 0001209191-22-021125 · doc4.xml · nonDerivative · entry 1

Fields Kimberly A · CIK 0001773072 · EVP & COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 137,378

F1 · shares: Settlement of performance-vested restricted stock units that were granted in 2019, the vesting of which was contingent upon the Issuer's achievement of specified performance criteria during the period form January 1, 2019 through December 31, 2021 (the "2019-2021 PSUs"). The shares underlying the 2019-2021 PSUs became payable as of February 24, 2022 following certification of the Issuer's achievement of such performance criteria by the Personnel and Compensation Committee of the Issuer's Board of Directors.

SEC source: 0001209191-22-002461 · doc4.xml · nonDerivative · entry 1

NEWMAN DONALD P · CIK 0001282236 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 146,289

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on January 6, 2020. One-third of such restricted stock units vested by their terms on January 6, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on January 6, 2022.

SEC source: 0001209191-22-021131 · doc4a.xml · nonDerivative · entry 1

NEWMAN DONALD P · CIK 0001282236 · EVP and CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 146,773

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on January 6, 2020. One-third of such restricted stock units vested by their terms on January 6, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange on January 6, 2022.

SEC source: 0001209191-22-002207 · doc4.xml · derivative · entry 3

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,282

Underlying: Common Stock · 51,282 shares

Expires 2025-12-31

F6 · derivative.exercise_price: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

F5 · price: Awarded under ATI's 2020 Incentive Plan.

F6 · derivative.exercise_date: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

F6 · derivative.expiration_date: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

SEC source: 0001209191-22-002207 · doc4.xml · nonDerivative · entry 2

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 180,423.323

F4 · shares: Award of restricted stock units, which are settled in shares of stock upon vesting. The award vests in three equal annual installments on each of the first three anniversaries of the grant date.

F5 · price: Awarded under ATI's 2020 Incentive Plan.

F3 · balance_after: This amount includes 1,933.9109 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,620 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-002207 · doc4.xml · nonDerivative · entry 1

Kramer Kevin B · CIK 0001549592 · Sr. VP, CCMO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 156,043.323

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on January 4, 2021. One-third of such restricted stock units vested by their terms on January 4, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange ("NYSE") on January 4, 2022.

F3 · balance_after: This amount includes 1,933.9109 shares of common stock that Mr. Kramer owns in the Company's 401(k) Plan. Fluctuations in 401(k) share amounts reflect the Plan's unit reporting method. Mr. Kramer holds approximately 1,620 units, which represent interests in the Company's stock fund.

SEC source: 0001209191-22-002204 · doc4.xml · derivative · entry 3

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 51,282

Underlying: Common Stock · 51,282 shares

Expires 2025-12-31

F5 · derivative.exercise_price: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

F4 · price: Awarded under ATI's 2020 Incentive Plan.

F5 · derivative.exercise_date: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

F5 · derivative.expiration_date: Each Performance Stock Unit ("PSU") represents a contingent right to receive one share of the Issuer's Common Stock if the Issuer's Common Stock achieves a specified target market price (based on a 20-trading day average) on the NYSE for at least 20 consecutive trading days ("20-Day Average Market Price") prior to December 31, 2025. Each PSU may result in the right to receive additional shares of the Issuer's Common Stock, up to a maximum of three shares per PSU, to the extent that the Issuer's Common Stock achieves 20-Day Average Market Prices at specified levels in excess of the target market price prior to December 31, 2025. Vested shares, if any, generally are payable in two equal installments in early 2026 and early 2027.

SEC source: 0001209191-22-002204 · doc4.xml · nonDerivative · entry 2

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 209,175.4709

F3 · shares: Award of restricted stock units, which are settled in shares of stock upon vesting. The award vests in three equal annual installments on each of the first three anniversaries of the grant date.

F4 · price: Awarded under ATI's 2020 Incentive Plan.

SEC source: 0001209191-22-002204 · doc4.xml · nonDerivative · entry 1

Davis Elliot S · CIK 0001520037 · Chief Legal & Compl. Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 185,273.4709

F1 · shares: Shares withheld for payment of taxes on restricted stock units awarded on January 4, 2021. One-third of such restricted stock units vested by their terms on January 4, 2022.

F2 · price: Represents the average of the high and low trading prices for one share of the Issuer's common stock on the New York Stock Exchange ("NYSE") on January 4, 2022.