As of September 29, 2026, Immunome's top three insider holders are Michael Rapp (Director, 1.07Mn shares), Clay B Siegall (President And Ceo, 870.70K shares), Philip Wagenheim (Director, 341.15K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Michael Rapp | Director | 1,071,172 | 0 | 1,071,172 | 35.9% | 03 Oct, 2023 |
| 2 | Clay B Siegall | President And Ceo | 870,704 | 0 | 870,704 | 29.2% | 27 Jul, 2026 |
| 3 | Philip Wagenheim | Director | 341,147 | 0 | 341,147 | 11.4% | 23 Mar, 2026 |
| 4 | Max Rosett | Chief Financial Officer | 101,287 | 0 | 101,287 | 3.4% | 27 Jul, 2026 |
| 5 | Isaac Barchas | Director | 92,211 | 0 | 92,211 | 3.1% | 12 Aug, 2026 |
| 6 | Philip Tsai | Chief Technical Officer | 81,550 | 0 | 81,550 | 2.7% | 27 Jul, 2026 |
| 7 | Robert Lechleider | Chief Medical Officer | 69,805 | 0 | 69,805 | 2.3% | 27 Jul, 2026 |
| 8 | John L Lamattina | Director | 66,953 | 0 | 66,953 | 2.2% | 17 Jan, 2023 |
| 9 | Franklyn G Prendergast | Director | 60,840 | 0 | 60,840 | 2.0% | 02 Oct, 2023 |
| 10 | Jack Higgins | Chief Scientific Officer | 56,250 | 0 | 56,250 | 1.9% | 15 Sep, 2026 |
| 11 | Sandra G. Stoneman | Chief Legal Officer Gc | 43,805 | 0 | 43,805 | 1.5% | 27 Jul, 2026 |
| 12 | Jean Jacques Bienaime | Director | 43,415 | 0 | 43,415 | 1.5% | 09 Jun, 2026 |
| 13 | Bruce Turner | Chief Strategy Officer | 42,300 | 0 | 42,300 | 1.4% | 02 Oct, 2023 |
| 14 | Michael Lefenfeld | Director | 40,747 | 0 | 40,747 | 1.4% | 17 Jan, 2023 |
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 |
|---|---|---|---|---|---|---|---|---|
| 10 Aug, 2026 | Isaac Barchas | Director | Disposed S | 10,125 | $26.07 | $263.96K | 62,291 | Indirect |
| 11 Aug, 2026 | Isaac Barchas | Director | Disposed S | 62,291 | $26.23 | $1.63Mn | 0 | Indirect |
| 12 Aug, 2026 | Isaac Barchas | Director | Disposed S | 11,048 | $27.25 | $301.06K | 92,211 | Direct |
| 06 Aug, 2026 | Isaac Barchas | Director | Disposed S | 20,840 | $26.06 | $543.09K | 87,664 | Indirect |
| 07 Aug, 2026 | Isaac Barchas | Director | Disposed S | 15,248 | $26.06 | $397.36K | 72,416 | Indirect |
| 04 Aug, 2026 | Kinney Horn | Chief Business Officer | Acquired M | 50,366 | $12.92 | $650.73K | 50,366 | Direct |
| 04 Aug, 2026 | Kinney Horn | Chief Business Officer | Acquired M | 40,250 | $10.60 | $426.65K | 90,616 | Direct |
| 04 Aug, 2026 | Kinney Horn | Chief Business Officer | Disposed S | 90,616 | $25.09 | $2.27Mn | 0 | Direct |
| 04 Aug, 2026 | Kinney Horn | Chief Business Officer | Disposed M | 50,366 | $0.00 | $0 | 78,542 | Direct |
| 04 Aug, 2026 | Kinney Horn | Chief Business Officer | Disposed M | 40,250 | $0.00 | $0 | 120,750 | Direct |
| 23 Jul, 2026 | Robert Lechleider | Chief Medical Officer | Acquired A | 54,000 | $0.00 | $0 | 69,805 | Direct |
| 23 Jul, 2026 | Kinney Horn | Chief Business Officer | Acquired A | 31,250 | $0.00 | $0 | 31,250 | Direct |
| 23 Jul, 2026 | Clay B Siegall | President And Ceo | Acquired A | 180,000 | $0.00 | $0 | 870,704 | Direct |
| 23 Jul, 2026 | Philip Tsai | Chief Technical Officer | Acquired A | 38,250 | $0.00 | $0 | 81,550 | Direct |
| 23 Jul, 2026 | Sandra G. Stoneman | Chief Legal Officer Gc | Acquired A | 38,250 | $0.00 | $0 | 43,805 | Direct |
| 23 Jul, 2026 | Jack Higgins | Chief Scientific Officer | Acquired A | 38,250 | $0.00 | $0 | 60,250 | Direct |
| 23 Jul, 2026 | Max Rosett | Chief Financial Officer | Acquired A | 47,250 | $0.00 | $0 | 101,287 | Direct |
| 23 Jul, 2026 | Kinney Horn | Chief Business Officer | Acquired A | 62,500 | $0.00 | $0 | 62,500 | Direct |
| 23 Jul, 2026 | Clay B Siegall | President And Ceo | Acquired A | 360,000 | $0.00 | $0 | 360,000 | Direct |
| 23 Jul, 2026 | Max Rosett | Chief Financial Officer | Acquired A | 94,500 | $0.00 | $0 | 94,500 | Direct |