TransMedics TMDX Institutional Ownership

NASDAQ TMDX

$83.45 -0.62 (-0.74%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

377 Institutions

Increased 210 55.7%

Unchanged 44 11.7%

Reduced 123 32.6%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

100.65%

▼-4.58 pp QoQ

Shares Held by Institutions

34.80Mn

of 34.58Mn outstanding

▲+0.68% QoQ

Shares Outstanding

34.58Mn

-223.77K held outside 13F filers

Institutional Investors

377

filed 13F for Jun 2026

▼-35 vs prior quarter

Net Shares Added (QoQ)

+234.90K

accumulated since last quarter

Value of Holdings

$2.90Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

TransMedics Group, Inc. (NASDAQ:TMDX) has 377 institutional investors with active 13F positions as of June 2026.

These investors held 100.6% of outstanding shares in June 2026, down from 105.2% in March 2026.
Their total shares held in TMDX increased 0.68% from the prior quarter, while the number of investors in TransMedics increased 4.14% year over year.
Of these 377 funds, 210 grew their exposure to TransMedics, 123 cut back, and 44 maintained positions.
Institutional investors collectively held 34.8Mn shares in TransMedics as of June 2026, up by 234.9K shares quarter on quarter, and down 927.57K shares year over year.
BlackRock, Inc. holds the largest position in TMDX at 5.6Mn shares as of June 30, 2026, or 16.18% of shares outstanding.
The most significant purchases of TMDX for the quarter ending June 2026 came from CITADEL ADVISORS LLC (497.22K), Sixth Street Partners Management Company, L.P. (328.67K), BlackRock, Inc. (303.22K), BRAIDWELL LP (280.32K), Tidal Investments LLC (251.2K).
The biggest sellers of TransMedics for the quarter ending June 2026 included Invesco Ltd. (643.0K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (541.27K), TWO SIGMA INVESTMENTS, LP (316.2K), Goldman Sachs Group Inc (306.51K), PRICE T ROWE ASSOCIATES INC /MD/ (300.66K).
Per Business Quant data, the top 10 holders of TransMedics for the quarter ending June 2026 are BlackRock, Inc. (5.6Mn), FMR LLC (5.13Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.93Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.5Mn), State Street Corp (1.42Mn), NOMURA ASSET MANAGEMENT INTERNATIONAL INC. (910.5K), GEODE CAPITAL MANAGEMENT, LLC (894.91K), Hood River Capital Management LLC (751.13K), DIMENSIONAL FUND ADVISORS LP (610.11K), BRAIDWELL LP (609.72K).

Form 13F Holdings

376 Institutional Holders

Report period 30 Jun, 2026

Total shares held 34.80Mn

Of outstanding 100.65%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	5,596,549	16.18%	▲303,218	+5.73%	$371.72Mn
2	FMR LLC	0000315066	5,133,328	14.84%	▲37,085	+0.73%	$340.96Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,933,989	5.59%	▲14,454	+0.75%	$128.46Mn
4	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,497,600	4.33%	▲19,448	+1.32%	$99.47Mn
5	State Street Corp	0000093751	1,420,421	4.11%	▲100,942	+7.65%	$94.34Mn
6	NOMURA ASSET MANAGEMENT INTERNATIONAL INC.	0000921739	910,495	2.63%	▲24,654	+2.78%	$60.48Mn
7	GEODE CAPITAL MANAGEMENT, LLC	0001214717	894,913	2.59%	▲55,758	+6.64%	$59.45Mn
8	Hood River Capital Management LLC	0001578177	751,133	2.17%	▲51,363	+7.34%	$49.89Mn
9	DIMENSIONAL FUND ADVISORS LP	0000354204	610,107	1.76%	▲93,428	+18.08%	$40.53Mn
10	BRAIDWELL LP	0001920938	609,715	1.76%	▲280,324	+85.10%	$40.50Mn
11	Goldman Sachs Group Inc	0000886982	559,771	1.62%	▼306,511	-35.38%	$37.18Mn
12	CITADEL ADVISORS LLC	0001423053	558,824	1.62%	▲497,223	+807.17%	$37.12Mn
13	EVENTIDE ASSET MANAGEMENT, LLC	0001442891	548,874	1.59%	▲50	+0.01%	$36.46Mn
14	WELLINGTON MANAGEMENT GROUP LLP	0000902219	515,973	1.49%	▲29,500	+6.06%	$34.27Mn
15	EMERALD ADVISERS, LLC	0001015083	490,491	1.42%	▲147,700	+43.09%	$32.58Mn
16	UBS Group AG	0001610520	488,058	1.41%	▼92,735	-15.97%	$32.42Mn
17	Morgan Stanley	0000895421	405,112	1.17%	▼289,038	-41.64%	$26.91Mn
18	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0000861177	398,250	1.15%	▼541,273	-57.61%	$26.45Mn
19	Invesco Ltd.	0000914208	394,979	1.14%	▼642,995	-61.95%	$26.23Mn
20	Citigroup Inc	0000831001	386,066	1.12%	▲28,685	+8.03%	$25.64Mn

Showing 1 to 20 of 376 holders