Mark D. Walker
Chairman and CEO at Direct Digital Holdings Inc.
Sits on 1 board. Last updated September 28, 2026
Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 4 years
- Director since
- 2023
4 years of board service in total across 1 board, counting each seat separately. Longest: Direct Digital Holdings Inc., 3 years.
Direct Digital Holdings Inc.
Director · Chairman and CEO
Chief executive roles
Direct Digital Holdings Inc.
· Chairman and CEO
Dates unknown
Insider trades
All notable trades →From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.
| Date | Company | Transaction | Shares | Price | Value |
|---|---|---|---|---|---|
| Sep 2, 2026 | Direct Digital Holdings Inc. | Open-market sale | −500 | $1.90 | $950 |
| Sep 1, 2026 | Direct Digital Holdings Inc. | Open-market sale | −1,636 | $2.06 | $3,366 |
| Aug 27, 2026 | Direct Digital Holdings Inc. | Derivative conversion | +10,000 | — | — |
| Jun 12, 2026 | Direct Digital Holdings Inc. | Open-market sale | −1,363 | $2.80 | $3,816 |
| Apr 1, 2026 | Direct Digital Holdings Inc. | Option exercise | +67 | — | — |
| Apr 1, 2026 | Direct Digital Holdings Inc. | Shares withheld for tax | −20 | $3.29 | $66 |
| Mar 20, 2026 | Direct Digital Holdings Inc. | Option exercise | +45 | — | — |
| Mar 20, 2026 | Direct Digital Holdings Inc. | Shares withheld for tax | −14 | $3.52 | $49 |
| Jan 24, 2026 | Direct Digital Holdings Inc. | Option exercise | +204 | — | — |
| Jan 24, 2026 | Direct Digital Holdings Inc. | Shares withheld for tax | −61 | $16.48 | $1,005 |
| Dec 4, 2025 | Direct Digital Holdings Inc. | Derivative conversion | +300,000 | — | — |
| Nov 14, 2025 | Direct Digital Holdings Inc. | Open-market sale | −245,008 | $0.21 | $51,452 |
| Nov 13, 2025 | Direct Digital Holdings Inc. | Open-market sale | −27,492 | $0.37 | $10,172 |
| Sep 11, 2025 | Direct Digital Holdings Inc. | Derivative conversion | +272,500 | — | — |
| Aug 19, 2025 | Direct Digital Holdings Inc. | Open-market sale | −23,000 | $0.39 | $8,970 |
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