8 insiders reported 15 Form 4 transactions for SELLAS Life Sciences Group, Inc. (SLS) over the past 18 months (most recent 2026-06-18). Recent activity: Stergiou Angelos M. (President and CEO) Buy 1.1M shares, VAN NOSTRAND ROBERT L (Director) Buy 50,000 shares, Varian John (Director) Buy 50,000 shares, Burns John Thomas (CFO) Buy 300,000 shares, SCHEINBERG DAVID A (Director) Buy 50,000 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-18 | Stergiou Angelos M. | President and CEO | Buy | 1.1M | $0 |
| 2026-01-09 | VAN NOSTRAND ROBERT L | Director | Buy | 50,000 | $0 |
| 2026-01-09 | Varian John | Director | Buy | 50,000 | $0 |
| 2026-01-09 | Burns John Thomas | CFO | Buy | 300,000 | $0 |
| 2026-01-09 | SCHEINBERG DAVID A | Director | Buy | 50,000 | $0 |
| 2026-01-09 | CICIC DRAGAN | SVP, Chief Development Officer | Buy | 300,000 | $0 |
| 2026-01-09 | Wasman Jane | Director | Buy | 50,000 | $0 |
| 2026-01-09 | Kalin Katherine Bach | Director | Buy | 50,000 | $0 |
| 2025-12-05 | Burns John Thomas | CFO | Sell | 58,592 | $87,888 |
| 2025-12-05 | CICIC DRAGAN | SVP, Chief Development Officer | Sell | 63,800 | $95,700 |
| 2025-12-05 | Stergiou Angelos M. | President and CEO | Sell | 187,066 | $280,599 |
| 2025-11-21 | Kalin Katherine Bach | Director | Buy | 63,400 | $100,806 |
| 2025-06-13 | VAN NOSTRAND ROBERT L | Director | Buy | 10,000 | $14,800 |
| 2025-06-02 | Wasman Jane | Director | Buy | 20,000 | $33,800 |
| 2025-05-22 | Kalin Katherine Bach | Director | Buy | 20,000 | $36,000 |
Source: SEC Form 4 filings · as of 2026-06-18