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

13F Institutional Holders and Ownership History from Q1 2019 to Q4 2025

Type / Class
Equity / Common Stock
Symbol
TMDX on Nasdaq
Shares outstanding
33,940,151
Price per share
$121.65
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
37,127,253
Total reported value
$4,166,041,614
% of total 13F portfolios
0.01%
Share change
+297,662
Value change
-$11,137,752
Number of holders
384
Price from insider filings
$121.65
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

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% $407,605,577 +$56,022,117 5,058,396 +16% FMR LLC 31 Mar 2025
BlackRock, Inc. 15% $605,087,043 4,955,262 BlackRock, Inc. 30 Jun 2025

As of 30 Sep 2025, 384 institutional investors reported holding 37,127,253 shares of TransMedics Group, Inc. - Common Stock (TMDX). This represents 109% 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% 5,331,598 +2.1% 0.01% $598,205,291
FMR LLC 15% 5,064,370 +0.81% 0.03% $568,222,298
VANGUARD GROUP INC 11% 3,605,607 +0.27% 0.01% $404,549,105
STATE STREET CORP 3.8% 1,279,541 -0.73% 0% $143,564,500
UBS AM, A DISTINCT BUSINESS UNIT OF UBS ASSET MANAGEMENT AMERICAS LLC 3.2% 1,069,492 +12% 0.03% $119,997,002
MACQUARIE GROUP LTD 2.7% 906,268 -4.8% 0.12% $101,683,000
UBS Group AG 2.5% 856,063 +80% 0.02% $96,050,269
GEODE CAPITAL MANAGEMENT, LLC 2.4% 813,571 +1.1% 0.01% $91,295,654
Driehaus Capital Management LLC 2.2% 738,158 -14% 0.59% $82,821,328
GOLDMAN SACHS GROUP INC 2.1% 703,578 +122% 0.01% $78,941,452
Hood River Capital Management LLC 2% 678,437 -0.21% 0.9% $76,120,631
TWO SIGMA INVESTMENTS, LP 1.9% 635,394 +54% 0.11% $71,291,207
MORGAN STANLEY 1.6% 547,819 -25% 0% $61,465,531
EVENTIDE ASSET MANAGEMENT, LLC 1.6% 547,296 -0.01% 1% $61,408,364
MARSHALL WACE, LLP 1.6% 541,678 -0.93% 0.07% $60,776,271
DIMENSIONAL FUND ADVISORS LP 1.3% 450,993 +20% 0.01% $50,602,112
TWO SIGMA ADVISERS, LP 1.2% 423,300 +54% 0.1% $47,494,260
PRICE T ROWE ASSOCIATES INC /MD/ 1.2% 398,160 +189% 0% $44,675,000
JPMORGAN CHASE & CO 1.2% 392,356 -15% 0% $44,022,343
EMERALD ADVISERS, LLC 1.1% 387,588 -12% 1.4% $43,487,374
Invesco Ltd. 1.1% 385,804 -19% 0.01% $43,287,209
BRAIDWELL LP 1% 351,248 +38% 1.2% $39,410,026
NORTHERN TRUST CORP 1% 347,469 -1.5% 0% $38,986,022
WASATCH ADVISORS LP 0.96% 325,202 -3% 0.2% $36,487,664
CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.95% 320,787 +1.8% 0.01% $35,992,301

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
2025 Q4 67,224 $8,272,508 +$635,897 $121.65 13
2025 Q3 37,127,253 $4,166,041,614 -$11,137,752 $112.20 384
2025 Q2 36,786,193 $4,927,662,357 -$289,195,543 $134.01 366
2025 Q1 39,009,472 $2,625,618,615 +$165,932,751 $67.28 295
2024 Q4 36,821,387 $2,295,630,734 -$367,158,418 $62.35 307
2024 Q3 36,104,848 $5,662,501,183 +$7,042,517 $157.00 367
2024 Q2 33,573,369 $5,056,777,985 +$90,770,403 $150.62 331
2024 Q1 33,958,747 $2,510,990,201 -$66,929,197 $73.94 250
2023 Q4 31,505 $2,486,689 -$5,432,042 $78.93 3
2023 Q3 34,911,856 $1,912,122,902 +$74,652,169 $54.75 216
2023 Q2 32,516,146 $2,730,425,221 +$225,026,024 $83.98 237
2023 Q1 29,885,958 $2,263,239,080 +$69,272,163 $75.73 220
2022 Q4 28,961,939 $1,787,519,826 +$25,535,066 $61.72 195
2022 Q3 28,264,074 $1,179,961,869 +$217,785,949 $41.74 171
2022 Q2 22,873,577 $719,016,393 +$64,884,380 $31.45 129
2022 Q1 20,661,150 $556,198,812 +$24,043,989 $26.94 105
2021 Q4 18,500,979 $354,448,814 +$28,817,634 $19.16 113
2021 Q3 19,228,051 $636,265,034 +$13,188,365 $33.09 116
2021 Q2 17,279,389 $574,335,047 +$770,528 $33.18 119
2021 Q1 18,632,180 $773,032,082 -$21,024,334 $41.49 106
2020 Q4 21,299,571 $423,671,614 -$4,479,253 $19.90 67
2020 Q3 20,583,490 $283,642,555 +$4,472,554 $13.78 69
2020 Q2 19,293,359 $345,715,740 +$89,491,178 $17.92 67
2020 Q1 14,997,032 $181,158,226 -$2,352,619 $12.08 51
2019 Q4 11,783,583 $224,000,755 +$60,010,242 $19.01 57
2019 Q3 14,295,927 $336,848,808 +$5,601,560 $23.75 47
2019 Q2 13,722,902 $384,183,739 +$384,181,720 $28.99 57
2019 Q1 54 $2,000 $0 $37.04 1