Gain Therapeutics's three largest insider shareholders as of September 09, 2026 are Eric I Richman (Chief Executive Officer, 289.63K shares), Eric I Richman (Chief Executive Officer, 289.63K shares), Eric I Richman (Chief Executive Officer, 217.73K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Eric I Richman | Chief Executive Officer | 507,358 | 0 | 507,358 | 88.1% | 01 Jul, 2024 |
| 2 | Jeffrey Scott Riley | Director | 30,000 | 0 | 30,000 | 5.2% | 01 Apr, 2024 |
| 3 | Matthias Alder | Chief Executive Officer | 21,140 | 0 | 21,140 | 3.7% | 28 Mar, 2024 |
| 4 | Gene Mack | Cfo And Interim Ceo | 14,400 | 0 | 14,400 | 2.5% | 12 Aug, 2024 |
| 5 | Salvatore Calabrese | Chief Financial Officer | 3,000 | 0 | 3,000 | 0.5% | 23 May, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 15 Jul, 2026 | Jeffrey Scott Riley | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 15 Jul, 2026 | Gwen A Melincoff | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 15 Jul, 2026 | Dov A Md Goldstein | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 15 Jul, 2026 | Khalid Islam | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 15 Jul, 2026 | Claude Nicaise | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 15 Jul, 2026 | Hans Peter Hasler | Director | Acquired A | 25,000 | $0.00 | $0 | 25,000 | Direct |
| 24 Mar, 2026 | Gianluca Fuggetta | See Remark | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 24 Mar, 2026 | Gene Mack | Ceo, President | Acquired A | 200,000 | $0.00 | $0 | 200,000 | Direct |
| 24 Jun, 2025 | Jeffrey Scott Riley | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Eric I Richman | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Hans Peter Hasler | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Claude Nicaise | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Gwen A Melincoff | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Eric I Richman | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Eric I Richman | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Dov A Md Goldstein | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 24 Jun, 2025 | Eric I Richman | Director | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 20 Mar, 2025 | Gene Mack | Ceo, President | Acquired A | 200,000 | $0.00 | $0 | 200,000 | Direct |
| 20 Mar, 2025 | Gianluca Fuggetta | See Remark | Acquired A | 50,000 | $0.00 | $0 | 50,000 | Direct |
| 06 Jan, 2025 | Gene Mack | Ceo, President | Acquired A | 271,325 | $0.00 | $0 | 271,325 | Direct |