EVERITT DAVID C

SEC source: 0001193125-26-380153 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,826

Underlying: Common Stock · 64 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-26-000103 · wk-form4_1785795472.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,908

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 203 shares acquired pursuant to dividend reinvestments through June 2026.

SEC source: 0001196652-26-000002 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,762

Underlying: Common Stock · 73 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001193125-26-214565 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,131

Underlying: Common Stock · 1,503 shares

Expires not disclosed

F1 · security: The deferred stock units ("DSUs") represent the portion of the reporting person's annual equity award under the Allison Transmission Holdings, Inc. (the "Company") Ninth Amended and Restated Non-Employee Director Compensation Policy deferred pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan.

F2 · derivative.exercise_price: Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock.

F4 · price: The number of DSUs received was calculated based on $123.02, which was the closing price of the Company's common stock on the date of grant.

F3 · derivative.exercise_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

F3 · derivative.expiration_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

SEC source: 0000014930-26-000061 · wk-form4_1777908959.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,965

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 241 shares acquired pursuant to dividend reinvestments through March 2026.

SEC source: 0001193125-26-198130 · ownership.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,738.3965

F1 · balance_after: Includes acquisition of 158.0986 shares pursuant to dividend reinvestment.

SEC source: 0001193125-26-121745 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,689

Underlying: Common Stock · 81 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-26-000017 · wk-form4_1770072249.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,020

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 215 shares acquired pursuant to dividend reinvestments in December 2025.

SEC source: 0001193125-25-312702 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,608

Underlying: Common Stock · 89 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-25-000141 · wk-form4_1762206424.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,108

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 238 shares acquired pursuant to dividend reinvestments in September 2025.

SEC source: 0001196652-25-000005 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,519

Underlying: Common Stock · 95 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-25-000106 · wk-form4_1754321304.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,024

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 268 shares acquired pursuant to dividend reinvestments in June 2025.

SEC source: 0000950170-25-080884 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,424

Underlying: Common Stock · 80 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000950170-25-067996 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,628

Underlying: Common Stock · 1,570 shares

Expires not disclosed

F1 · security: The deferred stock units ("DSUs") represent the portion of the reporting person's annual equity award under the Allison Transmission Holdings, Inc. (the "Company") Eighth Amended and Restated Non-Employee Director Compensation Policy deferred pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan.

F2 · derivative.exercise_price: Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock.

F4 · price: The number of DSUs received was calculated based on $98.72, which was the closing price of the Company's common stock on the date of grant.

F3 · derivative.exercise_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

F3 · derivative.expiration_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

SEC source: 0000014930-25-000064 · wk-form4_1746137187.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,796

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 252 shares acquired pursuant to dividend reinvestments in March 2025.

SEC source: 0000950170-25-062896 · ownership.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,230.2979

F1 · balance_after: Includes acquisition of 150.7425 shares pursuant to dividend reinvestment.

SEC source: 0001628280-25-020240 · wk-form4_1745870470.xml · derivative · entry 4

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 22,538 shares

Expires not disclosed

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.

F2 · derivative.exercise_price: Restricted Stock Units granted under the 1995 Non-Employee Directors' Stock Plan convert into common stock on a one-for-one basis following termination of the Reporting Person's service as a Director of the Issuer.

F2 · derivative.exercise_date: Restricted Stock Units granted under the 1995 Non-Employee Directors' Stock Plan convert into common stock on a one-for-one basis following termination of the Reporting Person's service as a Director of the Issuer.

F2 · derivative.expiration_date: Restricted Stock Units granted under the 1995 Non-Employee Directors' Stock Plan convert into common stock on a one-for-one basis following termination of the Reporting Person's service as a Director of the Issuer.

SEC source: 0001628280-25-020240 · wk-form4_1745870470.xml · derivative · entry 3

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 16,025 shares

Expires not disclosed

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.

F1 · derivative.exercise_price: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.exercise_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.expiration_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

SEC source: 0001628280-25-020240 · wk-form4_1745870470.xml · nonDerivative · entry 2

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,563

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: 0001628280-25-020240 · wk-form4_1745870470.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,025

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: 0000950170-25-041163 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,344

Underlying: Common Stock · 89 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-25-000021 · wk-form4_1738706887.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,400

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 182 shares acquired pursuant to dividend reinvestments in December 2024.

SEC source: 0000950170-24-132213 · ownership.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,255

Underlying: Common Stock · 66 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001628280-24-047043 · wk-form4_1731440457.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $6.98 to $7.10, inclusive. The reporting person undertakes to provide to Enviri Corporation, any security holder of Enviri Corporation, 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 in footnote (1) to this Form 4.

SEC source: 0000014930-24-000169 · wk-form4_1730497460.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,541

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 173 shares acquired pursuant to dividend reinvestments in September 2024.

SEC source: 0001062993-24-016185 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,189

Underlying: Common Stock · 86 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-24-000137 · wk-form4_1722535475.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,796

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 175 shares acquired pursuant to dividend reinvestments in June 2024.

SEC source: 0001062993-24-011786 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,103

Underlying: Common Stock · 113 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001062993-24-009889 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,058

Underlying: Common Stock · 2,017 shares

Expires not disclosed

F1 · security: The deferred stock units ("DSUs") represent the portion of the reporting person's annual equity award under the Allison Transmission Holdings, Inc. (the "Company") Eighth Amended and Restated Director Compensation Policy deferred pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan.

F2 · derivative.exercise_price: Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock.

F4 · price: The number of DSUs received was calculated based on $76.81, which was the closing price of the Company's common stock on the date of grant.

F3 · derivative.exercise_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

F3 · derivative.expiration_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

SEC source: 0001628280-24-022668 · wk-form4_1715374058.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,025

Underlying: Common Stock · 16,025 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.exercise_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.expiration_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (1) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

SEC source: 0000014930-24-000092 · wk-form4_1714591967.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,061

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 149 shares acquired pursuant to dividend reinvestments in March 2024.

SEC source: 0000950170-24-050775 · ownership.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,089.5554

F1 · balance_after: Includes acquisition of 115.6246 shares pursuant to dividend reinvestment.

SEC source: 0001628280-24-017158 · wk-form4_1713820706.xml · derivative · entry 2

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,163

Underlying: Common Stock · 13,426 shares

Expires not disclosed

F3 · derivative.exercise_date: Represents deferred compensation under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each phantom stock unit represents the right to be paid in cash an amount equal to the fair market value of one share of Enviri Corporation Common Stock at the date of settlement. Represents a scheduled settlement date for the phantom stock units to be paid in cash in a lump sum commencing within thirty days at the beginning of the calendar year 2025.

F3 · derivative.expiration_date: Represents deferred compensation under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each phantom stock unit represents the right to be paid in cash an amount equal to the fair market value of one share of Enviri Corporation Common Stock at the date of settlement. Represents a scheduled settlement date for the phantom stock units to be paid in cash in a lump sum commencing within thirty days at the beginning of the calendar year 2025.

SEC source: 0001628280-24-017158 · wk-form4_1713820706.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 13,426 shares

Expires not disclosed

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.

F1 · derivative.exercise_date: Restricted Stock Units convert into common stock on a one-for-one basis.

F2 · derivative.expiration_date: On May 9, 2023 the reporting person was granted 13,426 restricted stock units that vested on the earlier of (i) the first anniversary of the grant date or (ii) the issuer's annual meeting of stockholders in the year immediately following the year of the grant date.

SEC source: 0001062993-24-006795 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,990

Underlying: Common Stock · 107 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-24-000020 · wk-form4_1706833515.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,358

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 125 shares acquired pursuant to dividend reinvestments in December 2023.

SEC source: 0001062993-23-021791 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,883

Underlying: Common Stock · 140 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-23-000196 · wk-form4_1698870767.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,679

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 148 shares acquired pursuant to dividend reinvestments in September 2023.

SEC source: 0001062993-23-017585 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,743

Underlying: Common Stock · 122 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-23-000169 · wk-form4_1691009285.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,888

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 131 shares acquired pursuant to dividend reinvestments in June 2023.

SEC source: 0001062993-23-012733 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,621

Underlying: Common Stock · 158 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0001628280-23-017592 · wf-form4_168383707852658.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,426

Underlying: Common Stock · 13,426 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (i) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.exercise_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (i) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

F1 · derivative.expiration_date: Represents restricted stock units granted under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each restricted stock unit shall vest at the close of business on the earlier of (i) the first anniversary of the grant date or (ii) the annual meeting of the Issuer's stockholders in the year immediately following the year of the grant date.

SEC source: 0001062993-23-010347 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,041

Underlying: Common Stock · 3,146 shares

Expires not disclosed

F1 · security: The deferred stock units ("DSUs") represent the portion of the reporting person's annual equity award under the Allison Transmission Holdings, Inc. (the "Company") Seventh Amended and Restated Director Compensation Policy deferred pursuant to the Company's Amended and Restated Non-Employee Director Deferred Compensation Plan.

F2 · derivative.exercise_price: Each DSU is the economic equivalent of one share of the Company's common stock. The DSUs become payable, in common stock, or at the Company's election cash, at the earlier of the reporting person's separation from service or a change in control. DSUs earn dividend equivalents when dividends are declared on the Company's common stock.

F4 · price: The number of DSUs received was calculated based on $46.08, which was the closing price of the Company's common stock on the date of grant.

F3 · derivative.exercise_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

F3 · derivative.expiration_date: The DSUs vest on the date of the next annual meeting of the stockholders of the Company.

SEC source: 0000014930-23-000099 · wf-form4_168305965569862.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,239

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 138 shares acquired pursuant to dividend reinvestments in March 2023.

SEC source: 0001209191-23-025548 · doc4.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,873.9308

F1 · shares: Represents grant of restricted stock units with provisions limiting transfer until the first anniversary of the grant date.

F2 · balance_after: Includes acquisition of shares pursuant to dividend reinvestment.

SEC source: 0001628280-23-012402 · wf-form4_168210655008329.xml · derivative · entry 2

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,129

Underlying: Common Stock · 15,924 shares

Expires not disclosed

F3 · derivative.exercise_date: Represents deferred compensation under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each phantom stock unit represents the right to be paid in cash an amount equal to the fair market value of one share of Harsco Corporation Common Stock at the date of settlement. Represents a scheduled settlement date for the phantom stock units to be paid in cash in a lump sum commencing within thirty days at the begin of the calendar year 2024.

F3 · derivative.expiration_date: Represents deferred compensation under the 2016 Non-Employee Directors' Long-Term Equity Compensation Plan. Each phantom stock unit represents the right to be paid in cash an amount equal to the fair market value of one share of Harsco Corporation Common Stock at the date of settlement. Represents a scheduled settlement date for the phantom stock units to be paid in cash in a lump sum commencing within thirty days at the begin of the calendar year 2024.

SEC source: 0001628280-23-012402 · wf-form4_168210655008329.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 15,924 shares

Expires not disclosed

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.

F1 · derivative.exercise_date: Restricted Stock Units convert into common stock on a one-for-one basis.

F2 · derivative.expiration_date: On May 9, 2022 the reporting person was granted 15,924 restricted stock units that vested on the earlier of (i) the first anniversary of the grant date or (ii) the issuer's annual meeting of stockholders in the year immediately following the year of the grant date.

SEC source: 0001062993-23-007370 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,463

Underlying: Common Stock · 165 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

SEC source: 0000014930-23-000019 · wf-form4_167537278102852.xml · nonDerivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 27,609

F1 · shares: Deferred shares deposited in the director's deferred account, which will be automatically distributed in predetermined installments after the director ceases being a director of the Company.

F2 · balance_after: Beneficial holdings include 136 shares acquired pursuant to dividend reinvestments in December 2022.

SEC source: 0001062993-22-023202 · form4.xml · derivative · entry 1

EVERITT DAVID C · CIK 0001196652 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,298

Underlying: Common Stock · 136 shares

Expires not disclosed

F1 · derivative.exercise_price: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.exercise_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.

F1 · derivative.expiration_date: The dividend equivalent rights accrued on previously awarded deferred stock units ("DSUs") and vest proportionately with the DSUs to which they relate. Each dividend equivalent right is the economic equivalent of one share of Allison Transmission Holdings, Inc. common stock.