Mason Mark (CIK 1487290) reported 8 SEC Form 4 insider transactions across 2 companies over the past 18 months (most recent 2026-02-24). Recent activity: Sell C (1,627 shares), Sell C (2,000 shares), Buy C (52,367 shares), Buy MSFT (145 shares), Sell C (29,210 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-24 | CITIGROUP INC (C) | Chief Financial Officer | Sell | 1,627 | $186,129 |
| 2026-02-24 | CITIGROUP INC (C) | Chief Financial Officer | Sell | 2,000 | $229,920 |
| 2026-02-13 | CITIGROUP INC (C) | Chief Financial Officer | Buy | 52,367 | $0 |
| 2026-02-03 | MICROSOFT CORP (MSFT) | Director | Buy | 145 | $0 |
| 2026-01-20 | CITIGROUP INC (C) | Chief Financial Officer | Sell | 29,210 | $3.4M |
| 2025-12-05 | MICROSOFT CORP (MSFT) | Director | Buy | 130 | $0 |
| 2025-09-12 | MICROSOFT CORP (MSFT) | Director | Buy | 125 | $0 |
| 2025-06-11 | MICROSOFT CORP (MSFT) | Director | Buy | 132 | $0 |
来源：SEC Form 4 申报文件 · 截至 2026-02-24