SLS · Insider Trading
SELLAS Life Sciences Group, Inc. Common Stock
Every open-market purchase and sale reported by SLS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-06-18 | Angelos M. Stergiou | President and CEO | A | +1,065,000 | — |
| 2026-01-09 | Dragan Cicic | SVP, Chief Development Officer | A | +300,000 | — |
| 2026-01-09 | John Varian | Director | A | +50,000 | — |
| 2026-01-09 | John Thomas Burns | CFO | A | +300,000 | — |
| 2026-01-09 | Jane Wasman | Director | A | +50,000 | — |
| 2026-01-09 | David A Scheinberg | Director | A | +50,000 | — |
| 2026-01-09 | Katherine Bach Kalin | Director | A | +50,000 | — |
| 2026-01-09 | Robert L Van Nostrand | Director | A | +50,000 | — |
| 2025-12-05 | Angelos M. Stergiou | President and CEO | J | −187,066 | −$280.60K |
| 2025-12-05 | Dragan Cicic | SVP, Chief Development Officer | J | −63,800 | −$95.70K |
| 2025-12-05 | John Thomas Burns | CFO | J | −58,592 | −$87.89K |
| 2025-11-21 | Katherine Bach Kalin | Director | Buy | +63,400 | +$100.81K |
| 2025-06-13 | Robert L Van Nostrand | Director | Buy | +10,000 | +$14.80K |
| 2025-06-02 | Jane Wasman | Director | Buy | +20,000 | +$33.80K |
| 2025-05-22 | Katherine Bach Kalin | Director | Buy | +20,000 | +$36.00K |
| 2025-01-14 | David A Scheinberg | Director | A | +12,500 | — |
| 2025-01-14 | John Varian | Director | A | +12,500 | — |
| 2025-01-14 | Angelos M. Stergiou | President and CEO | A | +500,900 | — |
| 2025-01-14 | Jane Wasman | Director | A | +12,500 | — |
| 2025-01-14 | Robert L Van Nostrand | Director | A | +12,500 | — |
| 2025-01-14 | Katherine Bach Kalin | Director | A | +12,500 | — |
| 2025-01-14 | John Thomas Burns | CFO | A | +194,300 | — |
| 2025-01-14 | Dragan Cicic | SVP, Chief Development Officer | A | +194,300 | — |
| 2024-12-05 | Dragan Cicic | SVP, Chief Development Officer | J | −8,256 | −$9.33K |
| 2024-12-05 | Angelos M. Stergiou | President and CEO | J | −28,289 | −$31.97K |
| 2024-12-05 | John Thomas Burns | CFO | J | −7,165 | −$8.10K |
| 2024-01-25 | Angelos M. Stergiou | President and CEO | A | +159,000 | — |
| 2024-01-25 | Robert L Van Nostrand | Director | A | +6,000 | — |
| 2024-01-25 | John Thomas Burns | CFO | A | +47,000 | — |
| 2024-01-25 | Barbara A Wood | EVP, Gen. Counsel, Corp. Sec. | A | +35,000 | — |
| 2024-01-25 | Katherine Bach Kalin | Director | A | +6,000 | — |
| 2024-01-25 | Jane Wasman | Director | A | +6,000 | — |
| 2024-01-25 | David A Scheinberg | Director | A | +6,000 | — |
| 2024-01-25 | John Varian | Director | A | +6,000 | — |
| 2024-01-25 | Robert Francomano | Chief Commercial Officer | A | +20,000 | — |
| 2023-12-08 | Robert Francomano | Chief Commercial Officer | J | −1,082 | −$1.17K |
| 2023-12-08 | John Thomas Burns | CFO | J | −2,929 | −$3.16K |
| 2023-12-08 | Angelos M. Stergiou | President and CEO | J | −12,268 | −$13.25K |
| 2023-12-08 | Barbara A Wood | EVP, Gen. Counsel, Corp. Sec. | J | −4,119 | −$4.45K |
| 2023-02-03 | Robert L Van Nostrand | Director | A | +2,500 | — |
| 2023-02-03 | Jane Wasman | Director | A | +2,500 | — |
| 2023-02-03 | Angelos M. Stergiou | President and CEO | A | +58,000 | — |
| 2023-02-03 | David A Scheinberg | Director | A | +2,500 | — |
| 2023-02-03 | John Varian | Director | A | +2,500 | — |
| 2023-02-03 | Katherine Bach Kalin | Director | A | +2,500 | — |
| 2023-02-03 | John Thomas Burns | CFO | A | +20,000 | — |
| 2023-02-03 | Robert Francomano | Chief Commercial Officer | A | +12,000 | — |
| 2023-02-03 | Barbara A Wood | EVP, Gen. Counsel, Corp. Sec. | A | +20,000 | — |
| 2022-12-05 | John Thomas Burns | Senior VP, Finance & CAO | Sell | −1,159 | −$3.00K |
| 2022-12-05 | Angelos M. Stergiou | President and CEO | Sell | −6,494 | −$16.94K |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Angelos M. Stergiou | President and CEO | 1,759,183 | $21.08M |
| Dragan Cicic | SVP, Chief Development Officer | 557,805 | $6.68M |
| John Thomas Burns | CFO | 554,327 | $6.64M |
| Katherine Bach Kalin | Director | 154,400 | $1.85M |
| Jane Wasman | Director | 92,900 | $1.11M |
| Robert L Van Nostrand | Director | 82,900 | $993.14K |
| David A Scheinberg | Director | 73,082 | $875.52K |
| John Varian | Director | 72,900 | $873.34K |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the SLS quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.