Time on boards
- Boards served
- 1
- Current seats
- 1
- Board service
- 3 years
- Director since
- 2023
3 years of board service in total across 1 board, counting each seat separately. Longest: Microsoft Corporation, 2 years.
Microsoft Corporation
Director
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 |
|---|---|---|---|---|---|
| Feb 20, 2026 | Citigroup Inc. | Open-market sale | −1,627 | $114.40 | $186,129 |
| Feb 20, 2026 | Citigroup Inc. | Open-market sale | −2,000 | $114.96 | $229,920 |
| Feb 11, 2026 | Citigroup Inc. | Grant or award | +52,367 | — | — |
| Jan 30, 2026 | Microsoft Corporation | Grant or award | +145 | — | — |
| Jan 20, 2026 | Citigroup Inc. | Shares withheld for tax | −29,210 | $118.04 | $3,447,915 |
| Dec 4, 2025 | Microsoft Corporation | Grant or award | +130 | — | — |
| Sep 10, 2025 | Microsoft Corporation | Grant or award | +125 | — | — |
| Jun 10, 2025 | Microsoft Corporation | Grant or award | +132 | — | — |
| Feb 14, 2025 | Citigroup Inc. | Open-market sale | −58,465 | $83.21 | $4,864,873 |
| Feb 14, 2025 | Citigroup Inc. | Gift | −3,073 | — | — |
| Feb 13, 2025 | Citigroup Inc. | Grant or award | +51,872 | — | — |
| Jan 31, 2025 | Microsoft Corporation | Grant or award | +151 | — | — |
| Jan 20, 2025 | Citigroup Inc. | Shares withheld for tax | −28,711 | $79.99 | $2,296,612 |
| Dec 9, 2024 | Microsoft Corporation | Grant or award | +132 | — | — |
| Sep 6, 2024 | Microsoft Corporation | Grant or award | +146 | — | — |
Questions about Mark Mason
What boards is Mark Mason on?
Mark Mason sits on the board of Microsoft Corporation.
How long has Mark Mason served on boards?
Our records show at least 3 years of board service across 1 board, the earliest from 2023.
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