TransMedics Group (TMDX)
Pairs warm organ perfusion systems with end-to-end transplant procurement and logistics.
$88.07
After hours−0.04 (−0.05%)
At close$88.11(+0.94%)
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13F · 13D/G · Form 4
| Institutions | ≈ 101.48% | 35.19M shares | |
|---|---|---|---|
| 405 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 3.30% | 1.15M shares | |
| 14 holders · as of Sep 14, 2026 | |||
| Strategic holders | 4.35% | 1.51M shares | |
| 1 holder · as of Feb 12, 2021 | |||
| Adds to | 109.13% | ||
34.68M company shares as of Sep 22, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 109.13%; nothing is left for Other.
13F, as of Jun 30, 2026
405 holders · 35.19M shares · 69 new positions · 217 increased · 123 reduced · 104 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 5.60M | 16.14% | +303.2K | Aug 7, 2026 |
| FMR LLC | 5.13M | 14.80% | +37.1K | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 1.93M | 5.58% | +14.5K | Aug 13, 2026 |
| Vanguard Capital Management LLC | 1.50M | 4.32% | +19.4K | Aug 13, 2026 |
| State Street Corp | 1.42M | 4.10% | +100.9K | Aug 7, 2026 |
| Macquarie Management Holdings, Inc. | 910.5K | 2.63% | +24.7K | Aug 14, 2026 |
| Geode Capital Management, LLC | 894.9K | 2.58% | +55.8K | Aug 12, 2026 |
| Hood River Capital Management LLC | 751.1K | 2.17% | +51.4K | Aug 14, 2026 |
13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| FMR LLC | 15.00% | 5.06M | 13G | May 12, 2025 |
| BlackRock, Inc. | 14.60% | 4.96M | 13G | Jul 18, 2025 |
| Vanguard Portfolio Management | 5.68% | 1.95M | 13G | Apr 29, 2026 |
| Vanguard Capital Management | 5.06% | 1.74M | 13G | Apr 30, 2026 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 11, 2026 | David Weilldirector | Purchase | 1,336 | $81.63 | 16,392 |
| Jun 15, 2026 | Thomas J. Gundersondirector | Sale | 9,624 | $75.06 | 16,642 |
| Mar 4, 2026 | David Weilldirector | Sale | 3,571 | $146.82 | 12,134 |
| Mar 4, 2026 | Stephanie Lovelldirector | Sale | 1,193 | $149.62 | 2,866 |
| Mar 2, 2026 | Nicholas Corcoranofficer: See remarks | Sale | 2,966 | $139.12 | 29,831 |
| Mar 2, 2026 | Anil P. Ranganathofficer: See remarks | Sale | 864 | $139.12 | 13,091 |
| Mar 2, 2026 | Gerardo Hernandezofficer: Chief Financial Officer | Sale | 375 | $139.12 | 14,689 |
| Mar 4, 2026 | Gerardo Hernandezofficer: Chief Financial Officer | Sale | 5,912 | $147.21 | 14,689 |
| Dec 4, 2025 | Gerardo Hernandezofficer: Chief Financial Officer | Sale | 920 | $139.62 | 15,064 |
| Dec 3, 2025 | David Weilldirector | Sale | 5,000 | $138.64 | 12,134 |
House and Senate disclosures
Not reported.