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Tatum Mark A.

Disclosed activity across 1 company

Tapewire entity
70344
SEC CIK
0001853185

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Reported relationships

Latest disclosed role at each company.

CompanyLast reported asReport datePublished
General Motors CoGM · Entity 2958DirectorDecember 31, 2025January 05, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

General Motors Co

Report date December 31, 2025 · Filed January 05, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Deferred Share Units ("DSUs")SEC Table II · derivative / convertible securityDirect19,509 Reported balance After 2025-12-31 transaction · row 1 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 1 · 2025-12-31 · Grant · Acquired 3,488 · Balance 19,509

F1: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Deferred Share Units ("DSUs")SEC Table II · derivative / convertible securityDirect19,689 Reported balance After 2025-12-31 transaction · row 2 Instrument identity requires review; Table II rows are not merged.
1 source row

Row 2 · 2025-12-31 · Grant · Acquired 180 · Balance 19,689

F2: Represents dividends accrued on DSUs in 2025 that were credited as additional DSUs at the end of the year.

F1: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Filing footnotes · ownership attribution and instrument terms

F1: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F2: Represents dividends accrued on DSUs in 2025 that were credited as additional DSUs at the end of the year.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
December 31, 2025 Filed Jan 5, 2026 16:32 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 180 $0.00 $0.00
Disclosure

SEC source: 0001853185-26-000002 · wk-form4_1767648719.xml · derivative · entry 2

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,689

Underlying: Common Stock · 180 shares

Expires not disclosed

F2 · security: Represents dividends accrued on DSUs in 2025 that were credited as additional DSUs at the end of the year.

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2025 Filed Jan 5, 2026 16:32 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 3,488 $0.00 $0.00
Disclosure

SEC source: 0001853185-26-000002 · wk-form4_1767648719.xml · derivative · entry 1

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,509

Underlying: Common Stock · 3,488 shares

Expires not disclosed

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2024 Filed Jan 3, 2025 17:23 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 147 $0.00 $0.00
Disclosure

SEC source: 0001467858-25-000024 · wk-form4_1735943000.xml · derivative · entry 2

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,021

Underlying: Common Stock · 147 shares

Expires not disclosed

F2 · security: Represents dividends accrued on DSUs in 2024 that were credited as additional DSUs at the end of the year.

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2024 Filed Jan 3, 2025 17:23 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 4,263 $0.00 $0.00
Disclosure

SEC source: 0001467858-25-000024 · wk-form4_1735943000.xml · derivative · entry 1

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,874

Underlying: Common Stock · 4,263 shares

Expires not disclosed

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2023 Filed Jan 3, 2024 17:14 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 97 $0.00 $0.00
Disclosure

SEC source: 0001467858-24-000015 · wk-form4_1704320041.xml · derivative · entry 2

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,611

Underlying: Common Stock · 97 shares

Expires not disclosed

F2 · security: Represents dividends accrued on DSUs in 2023 that were credited as additional DSUs at the end of the year.

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2023 Filed Jan 3, 2024 17:14 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 5,620 $0.00 $0.00
Disclosure

SEC source: 0001467858-24-000015 · wk-form4_1704320041.xml · derivative · entry 1

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,514

Underlying: Common Stock · 5,620 shares

Expires not disclosed

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2022 Filed Jan 4, 2023 17:15 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 25 $0.00 $0.00
Disclosure

SEC source: 0001467858-23-000015 · wf-form4_167287046555528.xml · derivative · entry 2

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,894

Underlying: Common Stock · 25 shares

Expires not disclosed

F2 · security: Represents dividends accrued on DSUs in 2022 that were credited as additional DSUs at the end of the year.

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2022 Filed Jan 4, 2023 17:15 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units ("DSUs") · Derivative 3,792 $0.00 $0.00
Disclosure

SEC source: 0001467858-23-000015 · wf-form4_167287046555528.xml · derivative · entry 1

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 5,869

Underlying: Common Stock · 3,792 shares

Expires not disclosed

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document
December 31, 2021 Filed Jan 4, 2022 17:21 UTC General Motors Co GM · Entity 2958 GrantDeferred Share Units · Derivative 2,077 $56.78 $117,932.06
Disclosure

SEC source: 0001467858-22-000017 · wf-form4_164133487639868.xml · derivative · entry 1

Tatum Mark A. · CIK 0001853185 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,077

Underlying: Common Stock · 2,077 shares

Expires not disclosed

F1 · derivative.exercise_price: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F2 · shares: Deferred Share Units ("DSUs") were awarded pursuant to the General Motors Company Deferred Compensation Plan for Non-Employee Directors (the ("Plan"). Under the Plan, each non-employee director is required to defer one-half of the $305,000 annual retainer fee for service on the Board of Directors into DSUs and may elect to defer more. The deferred portion of the retainer fee is pro-rated for a partial year of service and converted to DSUs based on the average closing price of the Company's Common Stock during the period of service.

F3 · price: The Reporting Person's annual retainer fee was pro-rated for a partial year of service, therefore, the price of the DSUs is the average closing price of the Company's Common Stock during the period of service.

F1 · derivative.exercise_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

F1 · derivative.expiration_date: Amounts credited as DSUs will be paid in cash after the non-employee director leaves the Board, valued at the average closing price of the Company's Common Stock during the quarter immediately preceding payment.

Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.