TransMedics Group Inc
Ownership
Ownership Structure
Who owns TransMedics Group Inc (TMDX)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 96.8% of the shares are freely tradable; institutional investors hold 108.9%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 16.14 | 5,596,549 | +5.7 | 06/30/2026 |
| FMR Inc | 14.80 | 5,133,328 | +0.7 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 5.58 | 1,933,989 | +0.8 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.32 | 1,497,600 | +1.3 | 06/30/2026 |
| State Street Corp | 4.10 | 1,420,421 | +7.7 | 06/30/2026 |
| Delaware Management Holdings Inc | 2.63 | 910,495 | +2.8 | 06/30/2026 |
| Geode Capital Management, LLC | 2.58 | 894,913 | +6.6 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 5.95 | 2,064,603 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.01 | 1,044,828 | +0.3 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.55 | 885,083 | -1.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Hassanein Waleed H | President & CEO | 171,093 | 11,411,903 $ | Jul 10, 2026 | direct |
| Corcoran Nicholas | See remarks | 41,558 | 2,771,919 $ | Jul 10, 2026 | direct |
| Hernandez Gerardo | Chief Financial Officer | 31,935 | 2,130,065 $ | Jul 10, 2026 | direct |
| Araujo Fernando N. | See Remarks | 22,969 | 1,532,032 $ | Oct 28, 2026 | direct |
| Weill David | Director | 16,392 | 1,093,346 $ | Sep 11, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 28, 2026 | Araujo Fernando N. | See Remarks | Other | 22,969 | 0.00 | – |
| Sep 11, 2026 | Weill David | Director | Buy | 1,336 | 81.63 | 109,058 |
| Aug 17, 2026 | Tobin James R | Director | Other | 18,000 | 0.00 | – |
| Jul 10, 2026 | Corcoran Nicholas | See remarks | Other | 11,727 | 0.00 | – |
| Jul 10, 2026 | Hernandez Gerardo | Chief Financial Officer | Other | 17,246 | 0.00 | – |
| Jul 10, 2026 | Hassanein Waleed H | President & CEO | Other | 49,669 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.