Security Snapshot

TransMedics Group, Inc. - Common Stock (TMDX) Institutional Ownership

CUSIP: 89377M109

13F Institutional Holders and Ownership History from Q1 2019 to Q1 2026

Latest Period

Q4 2025

Institutions Reporting

427

Shares (Excl. Options)

37,185,318

Price

$121.65

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Type / Class
Equity / Common Stock
Symbol
TMDX on Nasdaq
Shares outstanding
33,940,151
Price per share
$99.41
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
37,185,318
Total reported value
$4,524,907,686
% of total 13F portfolios
0.01%
Share change
-797,348
Value change
-$83,658,461
Number of holders
427
Price from insider filings
$99.41
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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Quick Takeaways

  • TMDX - TransMedics Group, Inc. - Common Stock is tracked under CUSIP 89377M109.
  • 427 institutions reported positions in Q4 2025.
  • 2 significant owners is listed from Schedule 13D/13G reporting.

What Changed

  • Holder count moved from 427 to 24 between Q4 2025 and Q1 2026.
  • Reported value moved from $4,524,907,686 to $33,552,243.

Why This Matters

  • You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
  • 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.

Source Evidence

Source: SEC Form 13F

Latest holder context comes from 427 institutions filings for Q4 2025.

Open SEC Evidence

Investment Quick Answers

What is CUSIP 89377M109?
CUSIP 89377M109 identifies TMDX - TransMedics Group, Inc. - Common Stock in SEC 13F datasets.

Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.

Significant Owners of TransMedics Group, Inc. - Common Stock (TMDX) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
FMR LLC 15% +16% $467,547,574 +$64,260,663 5,058,396 +16% FMR LLC 31 Mar 2025
BlackRock, Inc. 15% $664,054,661 4,955,262 BlackRock, Inc. 30 Jun 2025

As of 31 Dec 2025, 427 institutional investors reported holding 37,185,318 shares of TransMedics Group, Inc. - Common Stock (TMDX). This represents 110% of the company’s total 33,940,151 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of TransMedics Group, Inc. - Common Stock (TMDX) together control 80% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.

Institution Ownership % Shares Held Share Change % Portfolio % Holdings Value
BlackRock, Inc. 16% 5,395,232 +1.2% 0.01% $656,329,974
FMR LLC 15% 5,077,036 +0.25% 0.03% $617,621,412
VANGUARD GROUP INC 11% 3,605,279 -0.01% 0.01% $438,582,190
STATE STREET CORP 3.8% 1,275,133 -0.34% 0.01% $155,119,929
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 2.9% 996,878 -6.8% 0.03% $121,270,211
GOLDMAN SACHS GROUP INC 2.8% 965,931 +37% 0.02% $117,505,506
NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 2.5% 832,241 0% 0.15% $101,242,000
GEODE CAPITAL MANAGEMENT, LLC 2.4% 816,474 +0.36% 0.01% $99,339,491
Driehaus Capital Management LLC 2.1% 712,041 -3.5% 0.59% $86,619,788
Hood River Capital Management LLC 2% 690,357 +1.8% 0.92% $83,981,929
Invesco Ltd. 2% 684,574 +77% 0.01% $83,278,427
MORGAN STANLEY 2% 667,761 +22% 0% $81,233,295
UBS Group AG 1.9% 659,296 -23% 0.02% $80,203,359
PRICE T ROWE ASSOCIATES INC /MD/ 1.7% 569,970 +43% 0.01% $69,338,000
EVENTIDE ASSET MANAGEMENT, LLC 1.6% 548,267 +0.18% 1% $66,698,201
DIMENSIONAL FUND ADVISORS LP 1.4% 489,710 +8.6% 0.01% $59,573,649
TWO SIGMA INVESTMENTS, LP 1.3% 435,969 -31% 0.08% $53,035,629
WELLINGTON MANAGEMENT GROUP LLP 1.3% 433,321 +100% 0.01% $52,713,499
JPMORGAN CHASE & CO 1.1% 375,261 -4.4% 0% $45,650,501
TWO SIGMA ADVISERS, LP 1.1% 362,300 -14% 0.09% $44,073,795
EMERALD ADVISERS, LLC 1% 351,349 -9.3% 1.3% $42,741,606
NORTHERN TRUST CORP 1% 339,216 -2.4% 0.01% $41,265,627
WASATCH ADVISORS LP 0.98% 331,848 +2% 0.24% $40,369,309
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.95% 323,026 +0.7% 0.01% $39,296,113
BAILLIE GIFFORD & CO 0.93% 316,473 +21% 0.03% $38,498,941

Institutional Holders of TransMedics Group, Inc. - Common Stock (TMDX) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2026 Q1 337,486 $33,552,243 +$1,024,123 $99.41 24
2025 Q4 37,185,318 $4,524,907,686 -$83,658,461 $121.65 427
2025 Q3 37,129,044 $4,166,232,859 -$8,088,244 $112.20 386
2025 Q2 36,786,193 $4,927,662,357 -$289,195,543 $134.01 366
2025 Q1 39,009,472 $2,625,618,476 +$165,932,691 $67.28 295
2024 Q4 36,855,938 $2,297,784,694 -$388,696,786 $62.35 308
2024 Q3 36,492,550 $5,723,369,932 +$61,413,519 $157.00 365
2024 Q2 33,743,529 $5,082,407,329 +$90,020,373 $150.62 331
2024 Q1 34,019,976 $2,515,517,054 -$71,270,565 $73.94 251
2023 Q4 34,973,168 $2,760,564,347 -$4,091,949 $78.93 244
2023 Q3 34,944,103 $1,913,888,694 +$75,708,281 $54.75 218
2023 Q2 32,524,695 $2,731,143,204 +$226,755,585 $83.98 238
2023 Q1 29,891,511 $2,263,659,591 +$69,279,751 $75.73 221
2022 Q4 28,992,696 $1,789,417,886 +$38,499,424 $61.72 196
2022 Q3 28,283,349 $1,180,766,429 +$229,245,326 $41.74 174
2022 Q2 22,873,577 $719,448,960 +$66,828,071 $31.45 129
2022 Q1 20,846,434 $561,189,812 +$24,725,042 $26.94 107
2021 Q4 20,080,660 $384,713,814 +$27,430,654 $19.16 116
2021 Q3 19,228,003 $636,263,034 +$13,347,336 $33.09 116
2021 Q2 18,779,205 $623,049,047 +$1,144,101 $33.18 117
2021 Q1 18,628,828 $772,924,082 -$21,007,487 $41.49 104
2020 Q4 21,299,571 $423,671,614 -$4,482,122 $19.90 67
2020 Q3 20,827,226 $287,000,555 +$6,185,866 $13.78 71
2020 Q2 20,159,299 $361,233,740 +$92,950,873 $17.92 68
2020 Q1 15,072,652 $182,072,226 -$2,049,598 $12.08 53
2019 Q4 14,958,642 $284,357,755 -$13,693 $19.01 59
2019 Q3 14,301,117 $336,971,808 +$4,714,704 $23.75 49
2019 Q2 11,228,228 $311,861,739 +$311,859,996 $28.99 59
2019 Q1 54 $2,000 $37.04 1

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