Stock Ownership/TMDX

TRANSMEDICS GROUP INC (TMDX): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in TMDX · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
18
13F filers
Aggregate Value
$109.3M
Across holders
Last Price
$93.60
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity10 increased8 reduced5 exited
Full exits: MARSHALL WACE, LLP, TUDOR INVESTMENT CORP ET AL, Squarepoint Ops LLC, SHAW D E & CO INC, Gotham Asset Management, LLC
Institutional Holders of TMDX
↗
18 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund559K$37.1M34.0%0.0%Added+$24.4MQ2 2026
BAILLIE GIFFORD & CO
CIK 0001088875
Institutional Manager268K$17.8M16.3%0.0%Reduced$-5.9MQ2 2026
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund248K$16.5M15.1%0.0%Reduced+$16.1MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund193K$12.8M11.7%0.0%Added+$12.3MQ2 2026
Davidson Kempner Capital Management LP
CIK 0001595082
Hedge Fund167K$11.1M10.1%0.1%Added+$1.4MQ2 2026
Holocene Advisors, LP
CIK 0001700574
Hedge Fund34K$2.2M2.1%0.0%Added—Q2 2026
ArrowMark Colorado Holdings LLC
CIK 0001483859
Hedge Fund30K$2.0M1.8%0.1%Reduced$-9.4MQ2 2026
Brevan Howard Capital Management LP
CIK 0001512857
Hedge Fund29K$1.9M1.8%0.0%Added—Q2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund28K$1.9M1.7%0.0%Added+$1.9MQ2 2026
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
Hedge Fund27K$1.8M1.6%0.0%Reduced$-217KQ2 2026
CITADEL ADVISORS LLCAdded
Hedge Fund
$37.1M· 34.0% of total· 0.0% port· 559K sh· +$24.4M QoQ· Q2 2026
BAILLIE GIFFORD & COReduced
Institutional Manager
$17.8M· 16.3% of total· 0.0% port· 268K sh· $-5.9M QoQ· Q2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$16.5M· 15.1% of total· 0.0% port· 248K sh· +$16.1M QoQ· Q2 2026
Point72 Asset Management, L.P.Added
Hedge Fund
$12.8M· 11.7% of total· 0.0% port· 193K sh· +$12.3M QoQ· Q2 2026
Davidson Kempner Capital Management LPAdded
Hedge Fund
$11.1M· 10.1% of total· 0.1% port· 167K sh· +$1.4M QoQ· Q2 2026
Holocene Advisors, LPAdded
Hedge Fund
$2.2M· 2.1% of total· 0.0% port· 34K sh· — QoQ· Q2 2026
ArrowMark Colorado Holdings LLCReduced
Hedge Fund
$2.0M· 1.8% of total· 0.1% port· 30K sh· $-9.4M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$1.9M· 1.8% of total· 0.0% port· 29K sh· — QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$1.9M· 1.7% of total· 0.0% port· 28K sh· +$1.9M QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCReduced
Hedge Fund
$1.8M· 1.6% of total· 0.0% port· 27K sh· $-217K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$1.5M· 1.4% of total· 0.0% port· 23K sh· — QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$752K· 0.7% of total· 0.0% port· 11K sh· $-6.9M QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$641K· 0.6% of total· 0.0% port· 10K sh· — QoQ· Q2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$594K· 0.5% of total· 0.0% port· 9K sh· $-21.0M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$568K· 0.5% of total· 0.0% port· 9K sh· — QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$103K· 0.1% of total· 0.0% port· 2K sh· $-142K QoQ· Q2 2026
Walleye Capital LLCReduced
Hedge Fund
$18K· 0.0% of total· 0.0% port· 264 sh· $-69K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$10K· 0.0% of total· 0.0% port· 150 sh· — QoQ· Q2 2026
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