As of the latest Form 4 filed Jun 17, 2026.
What TransMedics Group Inc insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 12 most recent filings for TMDX.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-06-17 | 2026-06-15 | Gunderson Thomas J. Director | SSale | −9.62K | $75.06 | $722K | No | Form 4 ↗ |
| 2026-06-17 | 2026-06-15 | Gunderson Thomas J., Director | MExercise | +19.3K | $2.21 | $42.6K | No | Form 4 ↗ |
| 2025-12-05 | 2025-12-04 | Hernandez Gerardo Chief Financial Officer | SSale | −920.00 | $139.62 | $128K | No | Form 4 ↗ |
| 2025-12-05 | 2025-12-03 | Weill David Director | SSale | −5.00K | $138.64 | $693K | No | Form 4 ↗ |
| 2025-12-05 | 2025-12-03 | Weill David, Director | MExercise | +5.00K | $14.20 | $71.0K | No | Form 4 ↗ |
| 2025-11-26 | 2025-11-25 | Ranganath Anil P. See remarks | SSale | −3.00K | $145.22 | $436K | No | Form 4 ↗ |
| 2025-11-26 | 2025-11-25 | Ranganath Anil P., See remarks | MExercise | +3.00K | $93.88 | $282K | No | Form 4 ↗ |
| 2025-10-31 | 2025-10-29 | Basile Edward M Director | SSale | −4.14K | $130.45 | $540K | Yes (planned) | Form 4 ↗ |
| 2025-10-31 | 2025-10-29 | Basile Edward M, Director | MExercise | +4.14K | $0.70 | $2.90K | Yes (planned) | Form 4 ↗ |
| 2025-08-08 | 2025-08-07 | Hassanein Waleed H President & CEO | PPurchase | +1.86K | $116.85 | $217K | No | Form 4 ↗ |
| 2025-08-08 | 2025-08-07 | Hassanein Waleed H, President & CEO | PPurchase | +6.62K | $116.08 | $768K | No | Form 4 ↗ |
| 2025-08-08 | 2025-08-06 | Hassanein Waleed H, President & CEO | PPurchase | +8.40K | $118.68 | $997K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also TMDX’s full analysis or the market-wide insider trading feed. The tabs above jump to TMDX’s other SEC data.
Source: SEC Form 4 filings for TMDX, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
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