MCCARTNEY WILLIAM

SEC source: 0001260893-26-000001 · primary_doc.xml · derivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 106,156

Underlying: Common Stock · 41,250 shares

Expires not disclosed

F1 · security: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.exercise_price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · kind: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.exercise_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.expiration_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying_shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing June 1, 2026 and ending at its next regularly scheduled annual general meeting in 2027 (the "2027 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2027 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

SEC source: 0001260893-25-000001 · primary_doc.xml · derivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director · Chairperson

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,906

Underlying: Common Stock · 46,090 shares

Expires not disclosed

F1 · security: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.exercise_price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · kind: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.exercise_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.expiration_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying_shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and Chairperson of Mercer's board of directors and in respect of the board term commencing May 31, 2025 and ending at its next regularly scheduled annual general meeting in 2026 (the "2026 AGM"). Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

SEC source: 0001260893-24-000001 · primary_doc.xml · derivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,816

Underlying: Common Stock · 18,816 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · kind: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · price: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.exercise_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.expiration_date: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

F1 · derivative.underlying_shares: Represents deferred stock units ("DSUs") issued by Mercer International Inc. ("Mercer") as a grant to the Reporting Person under Mercer's non-employee director compensation program and the Amended and Restated 2022 Stock Incentive Plan in respect of the board term commencing May 31, 2024 and ending at its next regularly scheduled annual general meeting in 2025 (the "2025 AGM") and the period from his appointment as Chairperson of Mercer's board of directors until May 31, 2024 . Each DSU vests on the earlier of the one year anniversary of the grant date or the date of the 2025 AGM and represents the right to receive one share of Mercer's common stock and dividend equivalents after the Reporting Person ceases to be a director of Mercer, unless deferred in accordance with its terms.

SEC source: 0001522288-23-000007 · primary_doc.xml · nonDerivative · entry 2

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 113,650

F2 · shares: Represents a restricted stock award by Mercer to the Reporting Person under Mercer's non-employee director compensation program and the Plan in respect of the board term commencing May 31, 2023 and ending at its next regularly scheduled annual general meeting in 2024. These shares vest on the earlier of the one-year anniversary of the grant date or the date of the next regularly scheduled annual general meeting in 2024.

SEC source: 0001522288-23-000007 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 100,948

F1 · shares: Represents a restricted stock award by Mercer International Inc. ("Mercer") as a quarterly equity grant to the Reporting Person under Mercer's non-employee director compensation program and Amended and Restated 2022 Stock Incentive Plan as amended (the "Plan") in connection with his role as a director of Mercer for the period from April 1, 2023 to May 31, 2023. These shares vest on the one-year anniversary of the grant date. Mercer subsequently transitioned its non-employee director compensation program from quarterly on a calendar year basis to a program based on the one-year period between annual general meetings, being the general term of office for directors

SEC source: 0001848174-23-000002 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 98,831

F1 · shares: Represents a restricted stock award by Mercer International Inc. ("Mercer") as a quarterly equity grant to the Reporting Person under Mercer's 2023 Non-Employee Director Compensation Plan and Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director of Mercer. These shares vest on the one-year anniversary of the grant date.

SEC source: 0001260893-22-000001 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 96,004

F1 · shares: Represents a restricted stock award by Mercer International Inc. ("Mercer") to the Reporting Person under Mercer's Amended and Restated 2022 Stock Incentive Plan in connection with his role as a director and lead director of Mercer. These shares vest on June 7, 2023, provided that if a change in control of Mercer occurs prior to such date, such shares vest immediately upon such occurrence and, in the case of death or disability of the Reporting Person, a pro-rated portion of the shares will vest.

SEC source: 0001804365-21-000004 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 89,695

F1 · shares: Mr. McCartney was granted 6,460 restricted shares of common stock by Mercer International Inc. ("Mercer") in connection with his role as a director of Mercer and lead director of Mercer commencing June 1, 2021. These shares vest and become non-forfeitable on May 31, 2022, unless a change in control of Mercer occurs prior to such date, in which case such shares vest immediately upon the occurrence of such change in control.

SEC source: 0001260893-20-000001 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 83,235

F1 · shares: Mr. McCartney was granted 11,150 restricted shares of common stock by Mercer International Inc. ("Mercer") in connection with his role as a director of Mercer. These shares vest and become non-forfeitable on June 1, 2021, unless a change of control of Mercer occurs prior to such date, in which case such shares vest immediately upon the occurrence of such change in control.

SEC source: 0001333274-19-000002 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 72,085

F1 · shares: Mr. McCartney was granted 4,885 restricted shares of common stock by Mercer International Inc. ("Mercer") in connection with his role as a director of Mercer. These shares vest and become non-forfeitable on May 31, 2020, unless a change in control of Mercer occurs prior to such date, in which case such shares vest immediately upon the occurrence of such change in control.

SEC source: 0001742623-18-000004 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 67,200

F1 · shares: Mr. McCartney was granted 4,190 restricted shares of common stock by Mercer International Inc. ("Mercer"). These shares vest and become non-forfeitable on June 8, 2019, unless a change in control of Mercer occurs prior to such date, in which case such shares vest immediately upon the occurrence of such change in control.

SEC source: 0001294786-17-000005 · primary_doc.xml · nonDerivative · entry 1

MCCARTNEY WILLIAM · CIK 0001260893 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 63,010

F1 · shares: Mr. McCartney was granted 6,010 restricted shares of common stock by Mercer International Inc. ("Mercer") in connection with his role as a director of Mercer. These shares vest and become non-forfeitable on June 1, 2018, unless a change in control of Mercer occurs prior to such date, in which case such shares vest immediately upon the occurrence of such change in control.