TransMedics Group, Inc.
TMDX- Exchange
- Nasdaq
- Industry
- Electromedical & Electrotherapeutic Apparatus
- SEC CIK
- 0001756262
In the last 90 days, TransMedics Group, Inc. insiders filed 1 open-market purchase and 0 sales; 375 institutions reported holding it in 13F filings for Q2 2026, worth $2.31B in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in TransMedics Group, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 416
- −3 vs. Q4 2025
- Shares held
- 36.5M
- +2.95M (+8.8%) vs. Q4 2025
- Total value
- $3.63B
- −$453.7M (−11.1%) vs. Q4 2025
- New holders
- 67
- 149 more added
- Sold out
- 70
- 137 more reduced
10 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting TMDX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 375 | $2.31B |
| Q1 2026 | 416 | $3.63B |
| Q4 2025 | 429 | $4.53B |
| Q3 2025 | 388 | $4.17B |
| Q2 2025 | 368 | $4.93B |
| Q1 2025 | 298 | $2.63B |
| Q4 2024 | 315 | $2.30B |
| Q3 2024 | 374 | $5.74B |
| Q2 2024 | 340 | $5.09B |
| Q1 2024 | 262 | $2.52B |
| Q4 2023 | 249 | $2.76B |
| Q3 2023 | 222 | $1.91B |
| Q2 2023 | 240 | $2.73B |
| Q1 2023 | 225 | $2.26B |
| Q4 2022 | 200 | $1.79B |
| Q3 2022 | 178 | $1.18B |
| Q2 2022 | 135 | $719.7M |
| Q1 2022 | 110 | $561.4M |
| Q4 2021 | 121 | $384.7M |
| Q3 2021 | 120 | $636.5M |
| Q2 2021 | 124 | $623.5M |
| Q1 2021 | 107 | $773.0M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding TransMedics Group, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Wellington Management Group LLP | 486,473 | $48.4M | 0.01% | +53,152+12.3% | Added |
| Dimensional Fund Advisors LP | 516,679 | $51.4M | 0.01% | +26,969+5.5% | Added |
| Eventide Asset Management, LLC | 548,824 | $54.5M | 0.90% | +557+0.1% | Added |
| UBS Group AG | 580,793 | $57.7M | 0.01% | −78,503−11.9% | Reduced |
| Morgan Stanley | 694,150 | $69.0M | 0.00% | +26,389+4.0% | Added |
| Hood River Capital Management LLC | 699,770 | $69.6M | 0.70% | +9,413+1.4% | Added |
| Geode Capital Management, LLC | 839,155 | $83.4M | 0.01% | +22,681+2.8% | Added |
| Goldman Sachs Group Inc | 866,282 | $86.1M | 0.01% | −99,649−10.3% | Reduced |
| Nomura Asset Management International Inc. | 885,841 | $88.1M | 0.15% | +53,600+6.4% | Added |
| UBS Asset Management Americas Inc | 939,523 | $93.4M | 0.02% | −57,355−5.8% | Reduced |
| Invesco Ltd. | 1,037,974 | $103.2M | 0.01% | +353,400+51.6% | Added |
| State Street Corp | 1,319,479 | $131.2M | 0.00% | +44,346+3.5% | Added |
| Vanguard Capital Management LLC | 1,478,152 | $146.9M | 0.00% | +1,478,152 | New |
| Vanguard Portfolio Management LLC | 1,919,535 | $190.8M | 0.01% | +1,919,535 | New |
| FMR LLC | 5,096,243 | $506.6M | 0.03% | +19,207+0.4% | Added |
| BlackRock, Inc. | 5,293,331 | $526.2M | 0.01% | −101,901−1.9% | Reduced |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −362,300−100.0% | Sold out |
| State of Michigan Retirement System | 0 | $0 | 0.00% | −108,000−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −91,065−100.0% | Sold out |
| Lisanti Capital Growth, LLC | 0 | $0 | 0.00% | −56,751−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −45,174−100.0% | Sold out |
| Meridiem Capital Partners LP | 0 | $0 | 0.00% | −36,668−100.0% | Sold out |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −25,492−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −17,888−100.0% | Sold out |
| Verition Fund Management LLC | 0 | $0 | 0.00% | −17,100−100.0% | Sold out |
| Legato Capital Management LLC | 0 | $0 | 0.00% | −15,735−100.0% | Sold out |
| Weiss Asset Management LP | 0 | $0 | 0.00% | −15,264−100.0% | Sold out |
| Fieldview Capital Management, LLC | 0 | $0 | 0.00% | −11,045−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −10,588−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −10,299−100.0% | Sold out |
| Concurrent Investment Advisors, LLC | 0 | $0 | 0.00% | −9,344−100.0% | Sold out |
| Mariner, LLC | 0 | $0 | 0.00% | −9,022−100.0% | Sold out |
| Wakefield Asset Management LLLP | 0 | $0 | 0.00% | −8,801−100.0% | Sold out |
| VGI Partners Ltd | 0 | $0 | 0.00% | −8,600−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −7,761−100.0% | Sold out |
| Clough Capital Partners L P | 0 | $0 | 0.00% | −7,119−100.0% | Sold out |
| Vestmark Advisory Solutions, Inc. | 0 | $0 | 0.00% | −5,036−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −4,202−100.0% | Sold out |
| Entropy Technologies, LP | 0 | $0 | 0.00% | −3,742−100.0% | Sold out |
| Versor Investments LP | 0 | $0 | 0.00% | −3,712−100.0% | Sold out |
| Headlands Technologies LLC | 0 | $0 | 0.00% | −3,537−100.0% | Sold out |
| Eddie Patel Inc | 0 | $0 | 0.00% | −3,406−100.0% | Sold out |
| Summit Global Investments | 0 | $0 | 0.00% | −3,260−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −2,943−100.0% | Sold out |
| Catalytic Wealth RIA, LLC | 0 | $0 | 0.00% | −2,771−100.0% | Sold out |
| Wealth Enhancement Advisory Services, LLC | 0 | $0 | 0.00% | −2,502−100.0% | Sold out |
| Occudo Quantitative Strategies LP | 0 | $0 | 0.00% | −2,577−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −2,552−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −2,472−100.0% | Sold out |
| Spire Wealth Management | 0 | $0 | 0.00% | −2,236−100.0% | Sold out |
| O'Shaughnessy Asset Management, LLC | 0 | $0 | 0.00% | −2,207−100.0% | Sold out |
| Guidance Capital, Inc | 0 | $0 | 0.00% | −1,906−100.0% | Sold out |
| Two Sigma Securities, LLC | 0 | $0 | 0.00% | −2,123−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −2,086−100.0% | Sold out |
| Venturi Wealth Management, LLC | 0 | $0 | 0.00% | −1,973−100.0% | Sold out |
| Indivisible Partners | 0 | $0 | 0.00% | −1,891−100.0% | Sold out |
| Opal Capital LLC | 0 | $0 | 0.00% | −1,677−100.0% | Sold out |
| Merit Financial Group, LLC | 0 | $0 | 0.00% | −1,767−100.0% | Sold out |
| Mangrove Partners | 0 | $0 | 0.00% | −1,764−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −1,747−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −1,744−100.0% | Sold out |
| EP Wealth Advisors, LLC | 0 | $0 | 0.00% | −1,728−100.0% | Sold out |
| Brookstone Capital Management | 0 | $0 | 0.00% | −1,718−100.0% | Sold out |
| Sanctuary Advisors, LLC | 0 | $0 | 0.00% | −1,694−100.0% | Sold out |
| Meridian Wealth Management, LLC | 0 | $0 | 0.00% | −1,679−100.0% | Sold out |
| 49 Wealth Management, LLC | 0 | $0 | 0.00% | −1,677−100.0% | Sold out |
| Walleye Trading LLC | 0 | $0 | 0.00% | −1,200−100.0% | Sold out |
| Flagship Harbor Advisors, LLC | 0 | $0 | 0.00% | −504−100.0% | Sold out |
| Harvest Fund Management Co., Ltd | 0 | $0 | 0.00% | −255−100.0% | Sold out |
| Atlantic Union Bankshares Corp | 0 | $0 | 0.00% | −164−100.0% | Sold out |
| Maseco LLP | 0 | $0 | 0.00% | −141−100.0% | Sold out |
| CoreCap Advisors, LLC | 0 | $0 | 0.00% | −125−100.0% | Sold out |
| Danske Bank A/S | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Greenline Wealth Management LLC | 0 | $0 | 0.00% | −99−100.0% | Sold out |
| Quarry LP | 0 | $0 | 0.00% | −98−100.0% | Sold out |
| CWM Advisors, LLC | 0 | $0 | 0.00% | −79−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −57−100.0% | Sold out |
| SageView Advisory Group, LLC | 0 | $0 | 0.00% | −31−100.0% | Sold out |
| South State Corp. | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| International Assets Investment Management, LLC | 0 | $0 | 0.00% | −10−100.0% | Sold out |
| Basecamp Wealth Advisors LLC | 0 | $0 | 0.00% | −9−100.0% | Sold out |
| Westside Investment Management, Inc. | 0 | $0 | 0.00% | −6−100.0% | Sold out |
| ROSS\JOHNSON & Associates LLC | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| DV Trading LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Concord Wealth Partners | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Dunhill Financial, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |
| Militia Capital Partners, LP | – | – | – | – | Not filed |
| Prosperity Wealth Management, Inc. | – | – | – | – | Not filed |
| CIBC World Markets Corp | – | – | – | – | Not filed |
| Global Retirement Partners, LLC | – | – | – | – | Not filed |
| ORG Partners LLC | – | – | – | – | Not filed |
| Trust Co of Vermont | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |