WEISS MICHAEL S (CIK 1038977) reported 7 SEC Form 4 insider transactions across 3 companies over the past 18 months (most recent 2026-03-20). Recent activity: Buy FBIO (475,424 shares), Buy TGTX (622,000 shares), Sell TGTX (3.9M shares), Sell TGTX (803,717 shares), Buy CKPT (12,195 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-20 | Fortress Biotech, Inc. (FBIO) | Executive Vice Chairman | Buy | 475,424 | $0 |
| 2026-01-09 | TG THERAPEUTICS, INC. (TGTX) | CEO | Buy | 622,000 | $0 |
| 2025-11-07 | TG THERAPEUTICS, INC. (TGTX) | CEO | Sell | 3.9M | $0 |
| 2025-11-07 | TG THERAPEUTICS, INC. (TGTX) | CEO | Sell | 803,717 | $0 |
| 2025-05-30 | Checkpoint Therapeutics, Inc. (CKPT) | Director | Buy | 12,195 | $0 |
| 2025-05-30 | Checkpoint Therapeutics, Inc. (CKPT) | Director | Buy | 50,000 | $64,500 |
| 2025-05-30 | Checkpoint Therapeutics, Inc. (CKPT) | Director | Sell | 187,007 | $0 |
Source: SEC Form 4 filings · as of 2026-03-20