Mark A. Tatum
Insider
First SEC filing: March 31, 2021 · Latest: March 31, 2021
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Dec. 31, 2025 | GM | A | 3,488 | · | · | 19,509 Direct | +21.77% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2025 | GM | A | 180 | · | · | 19,689 Direct | +0.92% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2024 | GM | A | 4,263 | · | · | 15,874 Direct | +36.72% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2024 | GM | A | 147 | · | · | 16,021 Direct | +0.93% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2023 | GM | A | 5,620 | · | · | 11,514 Direct | +95.35% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2023 | GM | A | 97 | · | · | 11,611 Direct | +0.84% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2022 | GM | A | 3,792 | · | · | 5,869 Direct | +182.57% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2022 | GM | A | 25 | · | · | 5,894 Direct | +0.43% | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2021 | GM | A | 2,077 | $56.78 | $117,932 | 2,077 Direct | · | Acquired | 37.8% (price as of 2026-10-02) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Dec. 31, 2025 | GM | Deferred Share Units ("DSUs") | Common Stock | · | · | 3,488 | Acquired |
| Dec. 31, 2025 | GM | Deferred Share Units ("DSUs") [F2] | Common Stock | · | · | 180 | Acquired |
| Dec. 31, 2024 | GM | Deferred Share Units ("DSUs") | Common Stock | · | · | 4,263 | Acquired |
| Dec. 31, 2024 | GM | Deferred Share Units ("DSUs") [F2] | Common Stock | · | · | 147 | Acquired |
| Dec. 31, 2023 | GM | Deferred Share Units ("DSUs") | Common Stock | · | · | 5,620 | Acquired |
| Dec. 31, 2023 | GM | Deferred Share Units ("DSUs") [F2] | Common Stock | · | · | 97 | Acquired |
| Dec. 31, 2022 | GM | Deferred Share Units ("DSUs") | Common Stock | · | · | 3,792 | Acquired |
| Dec. 31, 2022 | GM | Deferred Share Units ("DSUs") [F2] | Common Stock | · | · | 25 | Acquired |
| Dec. 31, 2021 | GM | Deferred Share Units | Common Stock | · | · | 2,077 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| March 31, 2021 | GM | No securities beneficially owned | 0 | Direct |