7 insiders reported 25 Form 4 transactions for Viridian Therapeutics, Inc.DE (VRDN) over the past 18 months (most recent 2026-05-13). Recent activity: Fairmount Healthcare Fund II L.P. (Director) Buy 1.2M shares, Fairmount Funds Management LLC (Director) Buy 1.2M shares, Fairmount Healthcare Fund II GP LLC (Director) Buy 1.2M shares, Harmon Seth (Chief Financial Officer) Sell 2,031 shares, Mahoney Stephen F. (President and CEO) Sell 7,408 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-13 | Fairmount Healthcare Fund II L.P. | Director | Buy | 1.2M | $20.0M |
| 2026-05-13 | Fairmount Funds Management LLC | Director | Buy | 1.2M | $20.0M |
| 2026-05-13 | Fairmount Healthcare Fund II GP LLC | Director | Buy | 1.2M | $20.0M |
| 2026-03-09 | Harmon Seth | Chief Financial Officer | Sell | 2,031 | $61,316 |
| 2026-03-09 | Mahoney Stephen F. | President and CEO | Sell | 7,408 | $223,648 |
| 2026-03-09 | Tousignant Jennifer | Chief Legal Officer | Sell | 1,675 | $50,568 |
| 2026-03-09 | Beetham Thomas W. | Chief Operating Officer | Sell | 3,048 | $92,019 |
| 2026-03-04 | Mahoney Stephen F. | President and CEO | Buy | 18,357 | $0 |
| 2026-03-04 | Harmon Seth | Chief Financial Officer | Sell | 2,091 | $61,308 |
| 2026-03-04 | Tousignant Jennifer | Chief Legal Officer | Buy | 5,169 | $0 |
| 2026-03-04 | Tousignant Jennifer | Chief Legal Officer | Sell | 1,724 | $50,548 |
| 2026-03-04 | Beetham Thomas W. | Chief Operating Officer | Buy | 9,409 | $0 |
| 2026-03-04 | Beetham Thomas W. | Chief Operating Officer | Sell | 3,138 | $92,006 |
| 2026-03-04 | Harmon Seth | Chief Financial Officer | Buy | 6,267 | $0 |
| 2026-03-04 | Mahoney Stephen F. | President and CEO | Sell | 7,627 | $223,624 |
| 2026-01-02 | Tousignant Jennifer | Chief Legal Officer | Sell | 2,272 | $70,796 |
| 2025-10-27 | Fairmount Healthcare Fund II L.P. | Director | Buy | 454,545 | $10.0M |
| 2025-10-27 | Fairmount Funds Management LLC | Director | Buy | 454,545 | $10.0M |
| 2025-10-27 | Fairmount Healthcare Fund II GP LLC | Director | Buy | 454,545 | $10.0M |
| 2025-06-11 | Fairmount Funds Management LLC | Director | Buy | 1,600 | $12,480 |
| 2025-06-11 | Fairmount Healthcare Fund II L.P. | Director | Buy | 1,600 | $12,480 |
| 2025-06-11 | Fairmount Healthcare Fund II GP LLC | Director | Buy | 1,600 | $12,480 |
| 2025-06-11 | Fairmount Healthcare Fund II L.P. | Director | Buy | 12,500 | $153,875 |
| 2025-06-11 | Fairmount Funds Management LLC | Director | Buy | 12,500 | $153,875 |
| 2025-06-11 | Fairmount Healthcare Fund II GP LLC | Director | Buy | 12,500 | $153,875 |
Source: SEC Form 4 filings · as of 2026-05-13