TMDX · TransMedics Group, Inc. · Shareholders & Ownership
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 positionsNo 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 | As of | Notes |
|---|---|---|---|---|
| 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 |
|
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 |
|
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 |
|
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 |
|
321,093 | ||
| 31 |
|
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 |
|
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.
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