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TMDX · TransMedics Group, Inc. · Shareholders & Ownership

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$74.75 +3.15 (+4.40%) At close · Oct 20
Market Cap
$2.48B
Shares
34.68M
Volume · Oct 20 1.17M Avg daily vol (3M) 835.45K

Every disclosed holder of TMDX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

Who Owns TMDX

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

No chart: the summed disclosures exceed shares outstanding, so they are not parts of one whole.

Holder group Shares % Out
Institutional (13F) 34,840,245 100.48%
Insiders (Forms 3, 4, 5) 1,001,777 2.89%
13D/G-only blocks 0 0.00%
Remaining 1,166,877 -3.37%
Registered funds (N-PORT, not summed) 19,537,063 56.34%

Shares outstanding: 34,675,145, the issuer's latest cover-page count restated onto today's split basis.

Remaining is negative: the summed disclosures exceed shares outstanding, as when filings are dated at different times or holders that do not disclose their links count the same shares. It is flagged, not clipped.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of TMDX

# Holder Shares
1
BlackRock, Inc.
13F CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
5,596,549
1.1
iShares Core S&P Small-Cap ETF
Fund S000004313 · Registered fund · Jun 30, 2026
iShares Trust, not summed
2,082,539
1.2
iShares Russell 2000 ETF
Fund S000004344 · Registered fund · Jun 30, 2026
iShares Trust, not summed
891,470
1.3
iShares Russell 2000 Growth ETF
Fund S000004343 · Registered fund · Jun 30, 2026
iShares Trust, not summed
316,810
1.4
iShares S&P Small-Cap 600 Growth ETF
Fund S000004314 · Registered fund · Jun 30, 2026
iShares Trust, not summed
310,912
1.5
iShares U.S. Medical Devices ETF
Fund S000009419 · Registered fund · Jun 30, 2026
iShares Trust, not summed
161,845
2
FMR LLC
13F CIK 315066 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
5,133,328
2.1
Fidelity Small Cap Growth Fund
Fund S000007193 · Registered fund · Jul 31, 2026
Fidelity Securities Fund, not summed
726,130
2.2
Fidelity Advisor New Insights Fund
Fund S000006036 · Registered fund · Jun 30, 2026
Fidelity Contrafund, not summed
614,300
2.3
VIP Contrafund Portfolio
Fund S000007724 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund II, not summed
589,600
2.4
VIP Mid Cap Portfolio
Fund S000007734 · Registered fund · Jun 30, 2026
Variable Insurance Products Fund III, not summed
383,700
2.5
Fidelity Small Cap Index Fund
Fund S000033638 · Registered fund · Jul 31, 2026
Fidelity Salem Street Trust, not summed
375,096
3
VANGUARD PORTFOLIO MANAGEMENT LLC
13F CIK 2100121 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,933,989
4
VANGUARD CAPITAL MANAGEMENT LLC
13F CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
1,497,600
5
STATE STREET CORP
13F CIK 93751 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
1,420,421
5.1
State Street(R) SPDR(R) Portfolio S&P 600(TM) Small Cap ETF
Fund S000041317 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
317,936
5.2
State Street(R) SPDR(R) S & P 600(TM) Small Cap Growth ETF
Fund S000006990 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
198,673
5.3
State Street(R) SPDR(R) S&P(R) Health Care Equipment ETF
Fund S000012330 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
33,230
5.4
STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO
Fund S000050332 · Registered fund · Jun 30, 2026
STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
11,900
5.5
State Street(R) SPDR(R) Portfolio S&P 1500(R) Composite Stock Market ETF
Fund S000006973 · Registered fund · Jun 30, 2026
SPDR SERIES TRUST, not summed
6,574
6
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
1,038,890
7
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.
13F CIK 921739 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
910,495
7.1
Nomura Small Cap Core Fund
Fund S000002400 · Registered fund · May 29, 2026
Delaware Group Equity Funds V, not summed
617,377
7.2
Nomura Small Cap Growth Fund
Fund S000006286 · Registered fund · Jun 30, 2026
IVY FUNDS, not summed
84,362
7.3
Optimum Small-Mid Cap Growth Fund
Fund S000002424 · Registered fund · Jun 30, 2026
Optimum Fund Trust, not summed
21,714
7.4
Nomura VIP Small Cap Growth Series
Fund S000006233 · Registered fund · Jun 30, 2026
Ivy Variable Insurance Portfolios, not summed
16,497
8
GEODE CAPITAL MANAGEMENT, LLC
13F CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
894,913
9
VANGUARD SMALL-CAP INDEX FUND
Fund S000002845 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
752,168
10
Hood River Capital Management LLC
13F CIK 1578177 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
751,133
10.1
Hood River Small-Cap Growth Fund
Fund S000012813 · Registered fund · Jun 30, 2026
Manager Directed Portfolios, not summed
365,464
10.2
Hood River New Opportunities Fund
Fund S000086255 · Registered fund · Jun 30, 2026
Manager Directed Portfolios, not summed
58,832
11
DIMENSIONAL FUND ADVISORS LP
13F CIK 354204 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
610,107
11.1
U.S. SMALL CAP PORTFOLIO
Fund S000000971 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
143,707
11.2
Dimensional U.S. Small Cap ETF
Fund S000070906 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
111,348
11.3
U.S. MICRO CAP PORTFOLIO
Fund S000000948 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
95,638
11.4
Dimensional U.S. Core Equity 2 ETF
Fund S000070903 · Registered fund · Jul 31, 2026
Dimensional ETF Trust, not summed
40,124
11.5
U.S. CORE EQUITY 1 PORTFOLIO
Fund S000000979 · Registered fund · Jul 31, 2026
DFA INVESTMENT DIMENSIONS GROUP INC, not summed
22,891
12
BRAIDWELL LP
13F CIK 1920938 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
609,715
13
GOLDMAN SACHS GROUP INC
13F CIK 886982 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
559,771
13.1
Goldman Sachs Small Cap Growth Fund
Fund S000061413 · Registered fund · May 31, 2026
Goldman Sachs Trust, not summed
24,833
13.2
Goldman Sachs Small Cap Equity Insights Fund
Fund S000009329 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
15,156
13.3
Goldman Sachs Small Cap Growth Insights Fund
Fund S000014930 · Registered fund · Jul 31, 2026
Goldman Sachs Trust, not summed
10,851
13.4
Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF
Fund S000048296 · Registered fund · May 31, 2026
Goldman Sachs ETF Trust, not summed
4,695
13.5
Goldman Sachs Variable Insurance Trust Small Cap Equity Insights Fund
Fund S000009355 · Registered fund · Jun 30, 2026
Goldman Sachs Variable Insurance Trust, not summed
3,363
14
CITADEL ADVISORS LLC
13F CIK 1423053 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
558,824
15
EVENTIDE ASSET MANAGEMENT, LLC
13F CIK 1442891 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
548,874
15.1
Eventide Gilead Fund
Fund S000022598 · Registered fund · Jun 30, 2026
MUTUAL FUND SERIES TRUST, not summed
460,684
15.2
Eventide Healthcare & Life Sciences Fund
Fund S000039514 · Registered fund · Jun 30, 2026
MUTUAL FUND SERIES TRUST, not summed
82,628
15.3
Eventide Small Cap ETF
Fund S000095403 · Registered fund · Jul 31, 2026
Strategy Shares, not summed
492
16
WELLINGTON MANAGEMENT GROUP LLP
13F CIK 902219 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
515,973
17
EMERALD ADVISERS, LLC
13F CIK 1015083 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
490,491
18
UBS Group AG
13F CIK 1610520 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
488,058
19
VANGUARD SMALL-CAP GROWTH INDEX FUND
Fund S000002846 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
434,956
20
MORGAN STANLEY
13F CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
405,112
21
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
13F CIK 861177 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
398,250
22
VANGUARD EXTENDED MARKET INDEX FUND
Fund S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
397,504
23
Invesco Ltd.
13F CIK 914208 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
394,979
23.1
Invesco S&P SmallCap Momentum ETF
Fund S000003024 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
334,085
23.2
Invesco S&P SmallCap Health Care ETF
Fund S000028299 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
23,938
23.3
Invesco S&P Smallcap 600 Pure Growth ETF
Fund S000060799 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
12,448
23.4
Invesco S&P SmallCap 600 QVM Multi-Factor ETF
Fund S000072320 · Registered fund · May 31, 2026
Invesco Exchange-Traded Fund Trust II, not summed
5,954
23.5
Invesco RAFI US 1500 Small-Mid ETF
Fund S000013120 · Registered fund · Jul 31, 2026
Invesco Exchange-Traded Fund Trust, not summed
5,338
24
CITIGROUP INC
13F CIK 831001 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
386,066
25
Capital World Investors
13F CIK 1422849 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
384,671
26
SMALLCAP World Fund Inc
Fund S000009599 · Registered fund · Jun 30, 2026
SMALLCAP World Fund Inc, not summed
374,177
27
NORTHERN TRUST CORP
13F CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
368,860
27.1
Small Cap Index Fund
Fund S000001245 · Registered fund · Jun 30, 2026
Northern Funds, not summed
17,370
27.2
Small Cap Core Fund
Fund S000001244 · Registered fund · Jun 30, 2026
Northern Funds, not summed
3,344
27.3
FlexShares Morningstar US Market Factor Tilt Index Fund
Fund S000033312 · Registered fund · Jul 31, 2026
FlexShares Trust, not summed
2,054
28
WASATCH ADVISORS LP
13F CIK 814133 · Registered investment adviser · Sep 30, 2026
333,162
28.1
Wasatch Small Cap Growth Fund
Fund S000000887 · Registered fund · Jun 30, 2026
WASATCH FUNDS TRUST, not summed
112,586
28.2
Wasatch Ultra Growth Fund
Fund S000000879 · Registered fund · Jun 30, 2026
WASATCH FUNDS TRUST, not summed
68,538
29
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
13F CIK 884546 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
328,666
29.1
Schwab U.S. Small-Cap ETF
Fund S000026636 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
164,969
29.2
Schwab Small-Cap Index Fund
Fund S000005912 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
83,444
29.3
Schwab Total Stock Market Index Fund
Fund S000005913 · Registered fund · Jul 31, 2026
SCHWAB CAPITAL TRUST, not summed
23,296
29.4
Schwab U.S. Broad Market ETF
Fund S000026631 · Registered fund · May 31, 2026
SCHWAB STRATEGIC TRUST, not summed
19,368
30
Hassanein Waleed H
Insider CIK 1430466 · Jul 10, 2026
Director, President & CEO, issuer-wide
321,093
31
KANIA EDWIN M JR
Insider CIK 1255927 · May 20, 2026
Director, issuer-wide
309,874
32
EMERALD MUTUAL FUND ADVISERS TRUST
13F CIK 1352895 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
302,074
32.1
Emerald Growth Fund
Fund S000036390 · Registered fund · Apr 30, 2026
FINANCIAL INVESTORS TRUST, not summed
74,920
32.2
Emerald Insights Fund
Fund S000046191 · Registered fund · Jul 31, 2025
FINANCIAL INVESTORS TRUST, not summed
1,757
33
BAILLIE GIFFORD & CO
13F CIK 1088875 · Investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
267,935
34
ZEVENBERGEN CAPITAL INVESTMENTS LLC
13F CIK 1276918 · Registered investment adviser · Sep 30, 2026
267,282
34.1
Zevenbergen Growth Fund
Fund S000082968 · Registered fund · Jun 30, 2026
Advisor Managed Portfolios, not summed
22,200
35
WELLS FARGO & COMPANY/MN
13F CIK 72971 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
260,218
36
BANK OF AMERICA CORP /DE/
13F CIK 70858 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
257,001
37
SUSQUEHANNA INTERNATIONAL GROUP, LLP
13F CIK 1446194 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
255,398
38
CONGRESS ASSET MANAGEMENT CO
13F CIK 897378 · Registered investment adviser · Sep 30, 2026
252,952
38.1
Congress SMid Growth ETF
Fund S000081384 · Registered fund · Jul 31, 2026
Professionally Managed Portfolios, not summed
95,152
39
Tidal Investments LLC
13F CIK 1600064 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
251,196
39.1
YieldMax(R) Ultra Option Income Strategy ETF
Fund S000084078 · Registered fund · Jul 31, 2026
Tidal Trust II, not summed
250,000
39.2
Intech S&P Small-Mid Cap Diversified Alpha ETF
Fund S000090661 · Registered fund · Jul 31, 2026
Tidal Trust III, not summed
1,196
40
MILLENNIUM MANAGEMENT LLC
13F CIK 1273087 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
248,312
41
VANGUARD FIDUCIARY TRUST CO
13F CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
245,680
42
PRINCIPAL FINANCIAL GROUP INC
13F CIK 1126328 · Insurance company · Jun 30, 2026
carried, not yet filed for the newest quarter
240,867
42.1
SmallCap Growth Fund I
Fund S000007175 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
121,141
42.2
Principal U.S. Small-Cap ETF
Fund S000055159 · Registered fund · Jun 30, 2026
Principal Exchange-Traded Funds, not summed
71,124
42.3
SmallCap S&P 600 Index Fund
Fund S000007203 · Registered fund · Jul 31, 2026
Principal Funds, Inc, not summed
25,463
43
BARCLAYS PLC
13F CIK 312069 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
237,615
44
American Beacon Small Cap Value Fund
Fund S000001818 · Registered fund · Jul 31, 2026
AMERICAN BEACON FUNDS, not summed
228,909
45
DEUTSCHE BANK AG\
13F CIK 948046 · Non-US institution · Jun 30, 2026
carried, not yet filed for the newest quarter
217,031
45.1
DWS Small Cap Index VIP
Fund S000006223 · Registered fund · Jun 30, 2026
DEUTSCHE DWS INVESTMENTS VIT FUNDS, not summed
5,322
46
VANGUARD TAX-MANAGED SMALL-CAP FUND
Fund S000004387 · Registered fund · Jun 30, 2026
VANGUARD TAX-MANAGED FUNDS, not summed
215,800
47
Bank of New York Mellon Corp
13F CIK 1390777 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
193,752
47.1
BNY Mellon Innovators ETF
Fund S000080183 · Registered fund · Aug 29, 2025
BNY Mellon ETF Trust, not summed
1,377
47.2
BNY Mellon US Small Cap Core Equity ETF
Fund S000067262 · Registered fund · Jul 31, 2026
BNY Mellon ETF Trust, not summed
1,234
48
Point72 Asset Management, L.P.
13F CIK 1603466 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
192,594
49
JPMORGAN CHASE & CO
13F CIK 19617 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
192,269
50
FirstWave Capital Management LLC
13F CIK 2093108 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
191,240

71 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 535 holders

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Key facts CIK 1756262 CUSIP 89377M109 13F (30d) 53 filings 53 filers Visit website Investor relations