TransMedics Group, Inc.

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TMDX·89377M109·US·Common Stock·Healthcare - Medical Devices-13D/G

TMDX (TransMedics Group, Inc.) is held by 163 institutional investors as of Q2 2026. Largest holders: BlackRock, Inc. ($371.7M), FMR LLC ($341M), VANGUARD PORTFOLIO MANAGEMENT LLC ($128.5M). Net institutional sentiment: Mixed.

163

Holders

(14 Elite)

$2B

Total Value

47% (185)

Consensus

87 buying - 98 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)42

Insider (Form 4)53

Activist (13D/13G)61

Congressional (STOCK Act)26

Holder Quality

44

★★★★★

Elite

34

★★★★

Strong

52

★★★

Solid

10

★★

Below

19

★

Weak

Held by 163 funds

14 elite

Who's Trading

Source dates: Price Aug 27, 2026 · Insiders Aug 17, 2026 · Activists Apr 30, 2026 · Congress none

InsiderTRTOBIN JAMES RGift 18K shAug 17, 2026

ActivistVAVanguard Capital Management5.1%Apr 30, 2026

ActivistVPVanguard Portfolio Management5.7%Apr 29, 2026

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Top Holders

Top Holders (163)History

AllNewIncreasedHeldDecreasedExited

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	5.6M(+5.7%)	$371.7M	0.0%	+50.18%	33
FMR LLC	Increased	5.1M(+0.7%)	$341M	0.0%	+47.80%	31
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	1.9M(+0.8%)	$128.5M	0.0%	-37.43%	30
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	1.5M(+1.3%)	$99.5M	0.0%	-37.24%	30
STATE STREET CORP	Increased	1.4M(+7.7%)	$94.3M	0.0%	-12.48%	32
NANOMURA ASSET MANAGEMENT INTERNATIONAL INC.	Increased	910,495(+2.8%)	$60.5M	0.1%	-24.38%	30
GEODE CAPITAL MANAGEMENT, LLC	Increased	894,913(+6.6%)	$59.5M	0.0%	+87.44%	31
Hood River Capital Management LLC	Increased	751,133(+7.3%)	$49.9M	0.4%	+31.23%	38
DIMENSIONAL FUND ADVISORS LP	Increased	610,107(+18.1%)	$40.5M	0.0%	+9.72%	34
GOLDMAN SACHS GROUP INC	Decreased	559,771(-35.4%)	$37.2M	0.0%	-6.05%	0
CITADEL ADVISORS LLC	Increased	558,824(+807.2%)	$37.1M	0.0%	+37.50%	47
WELLINGTON MANAGEMENT GROUP LLP	Increased	515,973(+6.1%)	$34.3M	0.0%	-22.20%	31
UBS Group AG	Decreased	488,058(-16.0%)	$32.4M	0.0%	+7.01%	0
MORGAN STANLEY	Decreased	405,112(-41.6%)	$26.9M	0.0%	-29.12%	0
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	Decreased	398,250(-57.6%)	$26.5M	0.0%	+17.32%	0
Invesco Ltd.	Decreased	394,979(-62.0%)	$26.2M	0.0%	-19.70%	0
CITIGROUP INC	Increased	386,066(+8.0%)	$25.6M	0.0%	-28.93%	31
Capital World Investors	Increased	384,671(+2.8%)	$25.5M	0.0%	-6.68%	29
NORTHERN TRUST CORP	Increased	368,860(+9.1%)	$24.5M	0.0%	+101.11%	31
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	328,666(+3.0%)	$21.8M	0.0%	+107.67%	29

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TMDXTransMedics Group, Inc.

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High Conviction Moves-Smart Money Convergence-Fund Consensus-Double-Down Detection

Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer