TRANSMEDICS GROUP INC (TMDX) Stock Institutional Trading Activity


TRANSMEDICS GROUP INC (TMDX) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Polen Capital Management, and Abrams Capital Management. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2025Renaissance Technologies LLCSell-134,90010,299$1,252,873
Q4 2025Polen Capital ManagementBuy5,13810,828$1,317,226
Q3 2025Polen Capital ManagementSell-5,6955,690$638,418
Q3 2025Renaissance Technologies LLCBuy33,400145,199$16,291,328
Q2 2025Polen Capital ManagementBuy11,38511,385$1,525,704
Q3 2024Renaissance Technologies LLCSell-20,100111,799$17,552,443
Q2 2024Renaissance Technologies LLCBuy68,100131,899$19,866,627
Q1 2024Renaissance Technologies LLCBuy52,10063,799$4,717
Q4 2023Renaissance Technologies LLCSell-13,60011,699$923
Q3 2023Renaissance Technologies LLCSell-47,50025,299$1,385
Q2 2023Renaissance Technologies LLCBuy9,60072,799$6,114
Q1 2023Renaissance Technologies LLCSell-39,80063,199$4,786
Q3 2022Renaissance Technologies LLCBuy102,999102,999$4,299
Q2 2019Abrams Capital ManagementBuy3,499,8593,499,859$87,820

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.