TMDX's three largest insider shareholders as of September 29, 2026 are Waleed H Hassanein (President Ceo, 495.01K shares), Edwin Kania (Director, 263.73K shares), Waleed H Hassanein (President Ceo, 171.09K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Edwin Kania | Director | 263,732 | 0 | 263,732 | 36.9% | 22 May, 2026 |
| 2 | Waleed H Hassanein | President Ceo | 171,093 | 0 | 171,093 | 23.9% | 14 Jul, 2026 |
| 3 | Nicholas Corcoran | Officer | 41,558 | 0 | 41,558 | 5.8% | 14 Jul, 2026 |
| 4 | Tamer I Khayal | Chief Commercial Officer | 36,042 | 0 | 36,042 | 5.0% | 05 Mar, 2025 |
| 5 | Gerardo Hernandez | Chief Financial Officer | 31,935 | 0 | 31,935 | 4.5% | 14 Jul, 2026 |
| 6 | Miriam Provost | Vp, Global Regulatory Affairs | 23,348 | 0 | 23,348 | 3.3% | 15 Dec, 2023 |
| 7 | Stephen Gordon | Chief Financial Officer | 21,299 | 0 | 21,299 | 3.0% | 05 Jun, 2024 |
| 8 | Giovanni Cecere | Chief Commercial Officer | 19,057 | 0 | 19,057 | 2.7% | 20 Feb, 2026 |
| 9 | Thomas J. Gunderson | Director | 16,642 | 0 | 16,642 | 2.3% | 17 Jun, 2026 |
| 10 | David Weill | Director | 16,392 | 0 | 16,392 | 2.3% | 14 Sep, 2026 |
| 11 | Matthew S. Forsyth | Officer | 15,409 | 0 | 15,409 | 2.2% | 21 May, 2026 |
| 12 | John F Carey | Vp Of Operations | 14,499 | 0 | 14,499 | 2.0% | 03 Feb, 2023 |
| 13 | Anil P. Ranganath | Officer | 13,091 | 0 | 13,091 | 1.8% | 04 Mar, 2026 |
| 14 | James R Tobin | Director | 6,981 | 0 | 6,981 | 1.0% | 22 May, 2026 |
| 15 | Merilee Raines | Director | 6,981 | 0 | 6,981 | 1.0% | 22 May, 2026 |
| 16 | Edward M Basile | Director | 5,788 | 0 | 5,788 | 0.8% | 22 May, 2026 |
| 17 | Stephanie Lovell | Director | 5,788 | 0 | 5,788 | 0.8% | 22 May, 2026 |
| 18 | Laura Damme | Vp, Clinical Affairs | 5,685 | 0 | 5,685 | 0.8% | 22 Feb, 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Aug, 2026 | James R Tobin | Director | Disposed G | 18,000 | $0.00 | $0 | 0 | Indirect |
| 10 Jul, 2026 | Waleed H Hassanein | President Ceo | Acquired A | 49,669 | $0.00 | $0 | 171,093 | Direct |
| 10 Jul, 2026 | Gerardo Hernandez | Chief Financial Officer | Acquired A | 17,246 | $0.00 | $0 | 31,935 | Direct |
| 10 Jul, 2026 | Nicholas Corcoran | Officer | Acquired A | 11,727 | $0.00 | $0 | 41,558 | Direct |
| 10 Jul, 2026 | Gerardo Hernandez | Chief Financial Officer | Acquired A | 26,153 | $0.00 | $0 | 26,153 | Direct |
| 10 Jul, 2026 | Nicholas Corcoran | Officer | Acquired A | 17,784 | $0.00 | $0 | 17,784 | Direct |
| 10 Jul, 2026 | Waleed H Hassanein | President Ceo | Acquired A | 112,984 | $0.00 | $0 | 112,984 | Direct |
| 15 Jun, 2026 | Thomas J. Gunderson | Director | Acquired M | 19,285 | $2.21 | $42.62K | 26,266 | Direct |
| 15 Jun, 2026 | Thomas J. Gunderson | Director | Disposed S | 9,624 | $75.06 | $722.38K | 16,642 | Direct |
| 15 Jun, 2026 | Thomas J. Gunderson | Director | Disposed M | 19,285 | $0.00 | $0 | 0 | Direct |
| 20 May, 2026 | James R Tobin | Director | Acquired A | 2,922 | $0.00 | $0 | 6,981 | Direct |
| 20 May, 2026 | Stephanie Lovell | Director | Acquired A | 2,922 | $0.00 | $0 | 5,788 | Direct |
| 20 May, 2026 | Thomas J. Gunderson | Director | Acquired A | 2,922 | $0.00 | $0 | 6,981 | Direct |
| 20 May, 2026 | Edwin Kania | Director | Acquired A | 2,922 | $0.00 | $0 | 263,732 | Direct |
| 20 May, 2026 | Edward M Basile | Director | Acquired A | 2,922 | $0.00 | $0 | 5,788 | Direct |
| 20 May, 2026 | Merilee Raines | Director | Acquired A | 2,922 | $0.00 | $0 | 6,981 | Direct |
| 20 May, 2026 | David Weill | Director | Acquired A | 2,922 | $0.00 | $0 | 15,056 | Direct |
| 19 May, 2026 | Matthew S. Forsyth | Officer | Acquired A | 15,409 | $0.00 | $0 | 15,409 | Direct |
| 19 May, 2026 | Matthew S. Forsyth | Officer | Acquired A | 23,171 | $0.00 | $0 | 23,171 | Direct |
| 04 Mar, 2026 | David Weill | Director | Acquired M | 3,571 | $14.20 | $50.71K | 15,705 | Direct |