TMDX TransMedics Group, Inc.
TransMedics Group, Inc. (TMDX) Institutional Ownership
What the institutions did with TMDX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 5.6M | 16.1% |
| FMR LLC | 5.1M | 14.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9M | 5.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | 4.3% |
| STATE STREET CORP | 1.4M | 4.1% |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 910.5K | 2.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 894.9K | 2.6% |
| Hood River Capital Management LLC | 751.1K | 2.2% |
| DIMENSIONAL FUND ADVISORS LP | 610.1K | 1.8% |
| BRAIDWELL LP | 609.7K | 1.8% |
| GOLDMAN SACHS GROUP INC | 559.8K | 1.6% |
| CITADEL ADVISORS LLC | 558.8K | 1.6% |
| EVENTIDE ASSET MANAGEMENT, LLC | 548.9K | 1.6% |
| WELLINGTON MANAGEMENT GROUP LLP | 516.0K | 1.5% |
| EMERALD ADVISERS, LLC | 490.5K | 1.4% |
| UBS Group AG | 488.1K | 1.4% |
| MORGAN STANLEY | 405.1K | 1.2% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 398.3K | 1.1% |
| Invesco Ltd. | 395.0K | 1.1% |
| CITIGROUP INC | 386.1K | 1.1% |
| Capital World Investors | 384.7K | 1.1% |
| NORTHERN TRUST CORP | 368.9K | 1.1% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 328.7K | 0.9% |
| WASATCH ADVISORS LP | 308.4K | 0.9% |
| ZEVENBERGEN CAPITAL INVESTMENTS LLC | 308.4K | 0.9% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Invesco Ltd. | Reduced | 1.0M | 395.0K | -643.0K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 939.5K | 398.3K | -541.3K |
| CITADEL ADVISORS LLC | Increased | 61.6K | 558.8K | +497.2K |
| TWO SIGMA INVESTMENTS, LP | Reduced | 325.1K | 8.9K | -316.2K |
| GOLDMAN SACHS GROUP INC | Reduced | 866.3K | 559.8K | -306.5K |
| BlackRock, Inc. | Increased | 5.3M | 5.6M | +303.2K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 346.7K | 46.0K | -300.7K |
| MORGAN STANLEY | Reduced | 694.2K | 405.1K | -289.0K |
| BRAIDWELL LP | Increased | 329.4K | 609.7K | +280.3K |
| Tidal Investments LLC | New | 0 | 251.2K | +251.2K |
| ROYCE & ASSOCIATES LP | Sold Out | 244.4K | 0 | -244.4K |
| CONGRESS ASSET MANAGEMENT CO | New | 0 | 227.8K | +227.8K |
| LORD, ABBETT & CO. LLC | Sold Out | 214.0K | 0 | -214.0K |
| Point72 Asset Management, L.P. | New | 0 | 192.6K | +192.6K |
| FRONTIER CAPITAL MANAGEMENT CO LLC | Reduced | 320.5K | 150.2K | -170.3K |
| Candriam S.C.A. | Sold Out | 158.8K | 0 | -158.8K |
| BLAIR WILLIAM & CO/IL | Reduced | 174.0K | 18.9K | -155.2K |
| EMERALD ADVISERS, LLC | Increased | 342.8K | 490.5K | +147.7K |
| Man Group plc | Reduced | 158.4K | 11.3K | -147.1K |
| ArrowMark Colorado Holdings LLC | Reduced | 171.1K | 30.2K | -140.9K |
| HRT FINANCIAL LP | Increased | 33.1K | 165.1K | +132.0K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 133.9K | 255.4K | +121.5K |
| JPMORGAN CHASE & CO | Reduced | 308.3K | 192.3K | -116.1K |
| ExodusPoint Capital Management, LP | Reduced | 115.3K | 8.6K | -106.8K |
| STATE STREET CORP | Increased | 1.3M | 1.4M | +100.9K |
| NEXT CENTURY GROWTH INVESTORS LLC | Sold Out | 96.4K | 0 | -96.4K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 516.7K | 610.1K | +93.4K |
| UBS Group AG | Reduced | 580.8K | 488.1K | -92.7K |
| Montanaro Asset Management Ltd | Sold Out | 78.7K | 0 | -78.7K |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | New | 0 | 75.1K | +75.1K |
| EMERALD MUTUAL FUND ADVISERS TRUST | Increased | 229.3K | 302.1K | +72.7K |
| Portolan Capital Management, LLC | Increased | 10.7K | 82.4K | +71.7K |
| Longaeva Partners L.P. | Sold Out | 69.1K | 0 | -69.1K |
| FirstWave Capital Management LLC | Increased | 124.3K | 191.2K | +67.0K |
| ENVESTNET ASSET MANAGEMENT INC | Reduced | 116.5K | 52.8K | -63.7K |
| IMC-Chicago, LLC | Increased | 27.7K | 90.5K | +62.8K |
| Militia Capital Management LLC | Sold Out | 58.6K | 0 | -58.6K |
| MILLENNIUM MANAGEMENT LLC | Reduced | 306.1K | 248.3K | -57.8K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 839.2K | 894.9K | +55.8K |
| Engineers Gate Manager LP | Sold Out | 52.6K | 0 | -52.6K |
| FEDERATED HERMES, INC. | Sold Out | 51.4K | 0 | -51.4K |
| Hood River Capital Management LLC | Increased | 699.8K | 751.1K | +51.4K |
| RAYMOND JAMES FINANCIAL INC | Reduced | 115.0K | 64.5K | -50.6K |
| BNP PARIBAS FINANCIAL MARKETS | Reduced | 144.5K | 96.3K | -48.2K |
| Empowered Funds, LLC | New | 0 | 48.2K | +48.2K |
| Integrated Advisors Network LLC | Sold Out | 47.6K | 0 | -47.6K |
| OSAIC HOLDINGS, INC. | Increased | 7.0K | 54.0K | +47.0K |
| BARCLAYS PLC | Increased | 190.6K | 237.6K | +47.0K |
| CREDIT AGRICOLE S A | Reduced | 87.4K | 42.6K | -44.7K |
| TUDOR INVESTMENT CORP ET AL | Sold Out | 40.2K | 0 | -40.2K |
| Driehaus Capital Management LLC | Sold Out | 40.1K | 0 | -40.1K |
| BANK OF AMERICA CORP /DE/ | Reduced | 295.2K | 257.0K | -38.2K |
| Gotham Asset Management, LLC | Sold Out | 37.8K | 0 | -37.8K |
| WASATCH ADVISORS LP | Reduced | 346.1K | 308.4K | -37.7K |
| BAILLIE GIFFORD & CO | Reduced | 305.2K | 267.9K | -37.3K |
| FMR LLC | Increased | 5.1M | 5.1M | +37.1K |
| Atom Investors LP | New | 0 | 36.5K | +36.5K |
| Holocene Advisors, LP | New | 0 | 33.8K | +33.8K |
| Mitsubishi UFJ Asset Management Co., Ltd. | Reduced | 32.9K | 109 | -32.8K |
| ALGERT GLOBAL LLC | Increased | 25.4K | 57.2K | +31.7K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.