As of September 29, 2026, Clene's top three insider holders are David J Matlin (Director, 912.27K shares), Resonance Llc General (TenPercentOwner, 704.59K shares), Alison Mosca (Director, 478.67K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | David J Matlin | Director | 1,356,766 | 0 | 1,356,766 | 42.2% | 18 Sep, 2026 |
| 2 | Alison Mosca | Director, TenPercentOwner | 0 | 759,171 | 759,171 | 23.6% | 18 Sep, 2026 |
| 3 | Resonance Llc General | TenPercentOwner | 704,591 | 0 | 704,591 | 21.9% | 21 Aug, 2025 |
| 4 | Chidozie Ugwumba | TenPercentOwner | 0 | 198,890 | 198,890 | 6.2% | 05 May, 2026 |
| 5 | Robert Dee Etherington | President Ceo | 95,542 | 0 | 95,542 | 3.0% | 18 Sep, 2026 |
| 6 | John Henry Stevens | Director | 40,010 | 0 | 40,010 | 1.2% | 27 Jun, 2023 |
| 7 | Mark Mortenson | Chief Science Officer | 28,949 | 0 | 28,949 | 0.9% | 01 Oct, 2024 |
| 8 | Reed N Wilcox | Director | 28,757 | 0 | 28,757 | 0.9% | 14 Nov, 2022 |
| 9 | Jonathon Gay | Director | 0 | 5,281 | 5,281 | 0.2% | 20 Jun, 2023 |
| 10 | Robert Glanzman | Chief Medical Officer | 528 | 0 | 528 | 0.0% | 18 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 |
|---|---|---|---|---|---|---|---|---|
| 16 Sep, 2026 | David J Matlin | Director | Acquired A | 434,451 | $3.28 | $1.42Mn | 912,275 | Direct |
| 16 Sep, 2026 | Alison Mosca | Director, TenPercentOwner | Acquired A | 198,171 | $3.28 | $650.00K | 478,671 | Indirect |
| 16 Sep, 2026 | Robert Dee Etherington | President Ceo | Acquired A | 15,244 | $3.28 | $50.00K | 55,393 | Direct |
| 13 Aug, 2026 | Matthew Kiernan | Director | Acquired A | 3,195 | $0.00 | $0 | 3,195 | Direct |
| 13 Aug, 2026 | Vallerie Mclaughlin | Director | Acquired A | 3,514 | $0.00 | $0 | 3,514 | Direct |
| 13 Aug, 2026 | Jonathon Gay | Director | Acquired A | 3,794 | $0.00 | $0 | 3,794 | Direct |
| 13 Aug, 2026 | Reed N Wilcox | Director | Acquired A | 3,514 | $0.00 | $0 | 3,514 | Direct |
| 13 Aug, 2026 | Arjun Jj Desai | Director | Acquired A | 3,674 | $0.00 | $0 | 3,674 | Direct |
| 13 Aug, 2026 | Alison Mosca | Director | Acquired A | 4,872 | $0.00 | $0 | 4,872 | Direct |
| 13 Aug, 2026 | David J Matlin | Director | Acquired A | 6,230 | $0.00 | $0 | 6,230 | Direct |
| 13 Aug, 2026 | Shalom Jacobovitz | Director | Acquired A | 4,752 | $0.00 | $0 | 4,752 | Direct |
| 17 Jul, 2026 | Chidozie Ugwumba | TenPercentOwner | Disposed J | 375,000 | — | — | 0 | Indirect |
| 17 Jul, 2026 | Chidozie Ugwumba | TenPercentOwner | Disposed J | 424,358 | — | — | 0 | Indirect |
| 11 Jun, 2026 | Robert Dee Etherington | President Ceo | Acquired A | 65,000 | $0.00 | $0 | 65,000 | Direct |
| 11 Jun, 2026 | Morgan R Brown | Chief Financial Officer | Acquired A | 15,000 | $0.00 | $0 | 15,000 | Direct |
| 11 Jun, 2026 | Mark Mortenson | Chief Science Officer | Acquired A | 45,000 | $0.00 | $0 | 45,000 | Direct |
| 21 May, 2026 | Shalom Jacobovitz | Director | Acquired A | 1,500 | $0.00 | $0 | 1,500 | Direct |
| 21 May, 2026 | Vallerie Mclaughlin | Director | Acquired A | 1,500 | $0.00 | $0 | 1,500 | Direct |
| 21 May, 2026 | Reed N Wilcox | Director | Acquired A | 1,500 | $0.00 | $0 | 1,500 | Direct |
| 21 May, 2026 | David J Matlin | Director | Acquired A | 1,500 | $0.00 | $0 | 1,500 | Direct |