Transmedics Group
TMDX · NASDAQ
$74.75+$3.15 (+4.40%)TodayMarket closed ·
Prev close $71.60
Who owns TMDX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 54.3% of TMDX’s shares.
- BlackRock Institutional Trust Company, N.A.14.5%
- Fidelity Management & Research Company LLC14.3%
- Vanguard Portfolio Management, LLC5.6%
- Vanguard Capital Management, LLC4.3%
- Next 6 largest institutions15.6%
- All other shareholders45.7%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 5.02M | 14.51% |
| Fidelity Management & Research Company LLC | 4.94M | 14.29% |
| Vanguard Portfolio Management, LLC | 1.93M | 5.60% |
| Vanguard Capital Management, LLC | 1.50M | 4.33% |
| State Street Investment Management (US) | 1.42M | 4.11% |
| Nomura Investment Management Business Trust | 910.50K | 2.63% |
| Geode Capital Management, L.L.C. | 894.91K | 2.59% |
| Emerald Advisers LLC | 792.57K | 2.29% |
| Hood River Capital Management LLC | 751.13K | 2.17% |
| Hassanein (Waleed H) | 614.00K | 1.78% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Small-Cap ETF | 2.11M | 6.09% |
| Vanguard Total Stock Market Index Fund | 1.04M | 3.02% |
| iShares Russell 2000 ETF | 887.61K | 2.57% |
| Vanguard Small-Cap Index Fund | 754.81K | 2.18% |
| Fidelity Small Cap Growth Fund | 726.13K | 2.10% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $109.06K (1 trade) of TMDX on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Weill David | Buy | 1.34K | $109.06K |
| TOBIN JAMES R | Gift | 18.00K | — |
| Corcoran Nicholas | Award | 17.78K | — |
| Corcoran Nicholas | Award | 11.73K | — |
| Hernandez Gerardo | Award | 26.15K | — |
| Hernandez Gerardo | Award | 17.25K | — |
| Hassanein Waleed H | Award | 112.98K | — |
| Hassanein Waleed H | Award | 49.67K | — |
| Lovell Stephanie | Award | 2.92K | — |
| Weill David | Award | 2.92K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 8.55M
- Days to cover
- 13.07
- % of shares outstanding
- 24.74%
- Average daily volume
- 654.56K
- Change since last report
- +7.2%
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