Mason David W (CIK 1744907) reported 14 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-04-28). Recent activity: Sell SEMR (271,248 shares), Sell SEMR (97,372 shares), Buy SEMR (143,338 shares), Sell SEMR (26,054 shares), Sell SEMR (3,592 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-28 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 271,248 | $3.3M |
| 2026-03-09 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 97,372 | $1.2M |
| 2025-12-17 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Buy | 143,338 | $0 |
| 2025-12-17 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 26,054 | $309,000 |
| 2025-12-02 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 3,592 | $42,493 |
| 2025-11-03 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 2,537 | $18,419 |
| 2025-09-02 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 2,486 | $19,639 |
| 2025-08-04 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 1,751 | $14,866 |
| 2025-06-04 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 7,500 | $75,225 |
| 2025-06-02 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 2,181 | $21,461 |
| 2025-05-02 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 1,541 | $15,996 |
| 2025-03-05 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Buy | 123,636 | $0 |
| 2025-03-05 | SEMrush Holdings, Inc. (SEMR) | Chief Legal Officer | Sell | 9,127 | $101,675 |
| 2025-02-04 | SEMrush Holdings, Inc. (SEMR) | General Counsel | Sell | 1,875 | $32,156 |
Source: SEC Form 4 filings · as of 2026-04-28