TRANSMEDICS GROUP INC (TMDX) Institutional Ownership Changes & 13F Activity

TRANSMEDICS GROUP INC (TMDX). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Citadel Advisors Llc, Invesco Ltd., Two Sigma Investments, Lp, Goldman Sachs Group Inc, and Price T Rowe Associates Inc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Anchor Investment Management, LlcBuy+7575$4.98KQ2 2026Sep 15, 2026
Manufacturers Life Insurance Company, TheBuy+1,925+12.6%17,159$1.14MQ2 2026Sep 09, 2026
M&T Bank CorpSell-2,929-100.0%0$0.00Q2 2026Sep 04, 2026
Parkside Financial Bank & TrustSell-57-60.6%37$2.46KQ2 2026Sep 04, 2026
Citadel Advisors LlcBuy+497,223+807.2%558,824$37.12MQ2 2026Sep 02, 2026
Corient Private Wealth LlcBuy+10,644+123.2%19,285$1.28MQ2 2026Aug 27, 2026
Optimize Financial IncSell-11-0.3%3,408$226.36KQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+2,010+5.3%39,850$2.65MQ2 2026Aug 24, 2026
Fulcrum Asset Management LlpBuy+150150$10.09KQ2 2026Aug 18, 2026
Empowered Funds, LlcBuy+48,15448,154$3.20MQ2 2026Aug 17, 2026
Capstone Investment Advisors, LlcBuy+9,6529,652$641.09KQ2 2026Aug 17, 2026
Invesco Ltd.Buy+394,979394,979$26.23MQ2 2026Aug 14, 2026
Two Sigma Investments, LpSell-316,195-97.2%8,945$594.13KQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-306,511-35.4%559,771$37.18MQ2 2026Aug 14, 2026
Price T Rowe Associates IncSell-300,655-86.7%46,028$3.06MQ2 2026Aug 14, 2026
Braidwell LpBuy+280,324+85.1%609,715$40.50MQ2 2026Aug 14, 2026
Point72 Asset Management, L.P.Buy+192,594192,594$12.79MQ2 2026Aug 14, 2026
Frontier Capital Management Co LlcSell-170,309-53.1%150,162$9.97MQ2 2026Aug 14, 2026
Davidson Kempner Capital Management LpBuy+166,900166,900$11.09MQ2 2026Aug 14, 2026
Man Group PlcSell-147,082-92.8%11,327$752.34KQ2 2026Aug 14, 2026
Hrt Financial LpBuy+132,004+398.8%165,106$10.97MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+121,523+90.8%255,398$16.96MQ2 2026Aug 14, 2026
Exoduspoint Capital Management, LpSell-106,792-92.6%8,553$568.09KQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+79,94879,948$5.31MQ2 2026Aug 14, 2026
Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am MainBuy+75,09075,090$4.99MQ2 2026Aug 14, 2026
Portolan Capital Management, LlcBuy+71,666+670.5%82,354$5.47MQ2 2026Aug 14, 2026
Millennium Management LlcSell-57,768-18.9%248,312$16.49MQ2 2026Aug 14, 2026
Hood River Capital Management LlcBuy+51,363+7.3%751,133$49.89MQ2 2026Aug 14, 2026
Osaic Holdings, Inc.Buy+47,048+673.3%54,036$3.59MQ2 2026Aug 14, 2026
Barclays PlcBuy+47,037+24.7%237,615$15.78MQ2 2026Aug 14, 2026
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Frequently asked questions about TMDX activity

  • Which institutional owners are buying TMDX?

    Institutional owners buying TMDX include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in TMDX activity?

    "Buy" means an investor increased their reported position in TMDX compared to the prior reporting period. This reflects growing exposure to TRANSMEDICS GROUP INC (TMDX) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in TMDX increasing?

    Institutional interest in TMDX can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.