Insiders / Mason Mark
Mason Mark
CIK 1487290personinsider
Companies
2
First seen
Jan 20, 2026
Last activity
Feb 24, 2026
Companies
| Company | Shares held | Latest |
|---|---|---|
| Citigroup Inc · C | 233,789 | — |
| Microsoft Corp · MSFT | 1,675 | — |
All securities held
3 positions · latest reported per filing
| Company | Security | Shares |
|---|---|---|
| Citigroup Inc | Common Stock | 233,789 |
| Citigroup Inc | Performance Share UnitsDerivative | 39,347 |
| Microsoft Corp | Common Stock | 1,675 |
Activity
InsidersInstitutions
This person's insider trades (Form 4), across every company.| Date | Action | Company | Value | Shares Δ | Position after | Impact |
|---|---|---|---|---|---|---|
| Jan 20, 2026 | Other | C Citigroup Inc Common Stock | $3.45M | -29K -13.63% | 185,048 0.01% of shares | low |
| Feb 20, 2026 | Sell | C Citigroup Inc Common Stock | $229.9K | -2K -0.85% | 233,789 0.01% of shares | medium |
| Feb 20, 2026 | Sell | C Citigroup Inc Common Stock | $186.1K | -2K -0.69% | 235,789 0.01% of shares | medium |
| Feb 11, 2026 | Grant | C Citigroup Inc Common Stock | $0 | +52K +28.30% | 237,416 0.01% of shares | low |
| Jan 30, 2026 | Grant | MSFT Microsoft Corp Common Stock | $0 | +145 +9.48% | 1,675 <0.01% of shares | low |
| Feb 20, 2026 | Grant | C Citigroup Inc Performance Share Units | — | +39K | 39,347 <0.01% of shares | low |