iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC) Institutional Ownership

13F Institutional Holders and Ownership History from Q4 2016 to Q4 2025

Type / Class
Equity / Common Stock, par value $0.001 per share
Symbol
IRTC on Nasdaq
Shares outstanding
32,068,774
Price per share
$148.99
All holders as of 31 Dec 2025
Q4 2025
Total 13F shares
35,162,791
Total reported value
$6,238,742,741
% of total 13F portfolios
0%
Share change
+561,845
Value change
+$103,376,004
Number of holders
331
Price from insider filings
$148.99
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
VANGUARD GROUP INC 10% $334,462,497 3,136,370 The Vanguard Group 31 Dec 2024
SANDS CAPITAL MANAGEMENT, LLC 5.3% -23% $264,192,819 -$83,388,120 1,699,645 -24% SANDS CAPITAL MANAGEMENT, LLC 31 Dec 2025
Artisan Partners Limited Partnership 4.7% $268,287,860 1,511,992 Artisan Partners Asset Management Inc. 31 Dec 2025
Capital Research Global Investors 4.7% -33% $204,843,092 -$94,581,343 1,506,864 -32% Capital Research Global Investors 30 Jun 2025

As of 31 Dec 2025, 331 institutional investors reported holding 35,162,791 shares of iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC). This represents 110% of the company’s total 32,068,774 outstanding shares.

Top 25 Institutional Shareholders

The largest institutional shareholders of iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC) together control 73% 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
VANGUARD GROUP INC 10% 3,310,519 +2.2% 0.01% $587,418,492
BlackRock, Inc. 8.8% 2,813,989 -2.1% 0.01% $499,314,164
SANDS CAPITAL MANAGEMENT, LLC 5.3% 1,699,645 -24% 0.92% $301,585,009
Artisan Partners Limited Partnership 4.7% 1,511,992 -41% 0.41% $268,287,790
Capital Research Global Investors 3.7% 1,184,746 +0.09% 0.04% $210,221,330
RTW INVESTMENTS, LP 3.7% 1,181,990 2.1% $209,732,306
GEODE CAPITAL MANAGEMENT, LLC 2.7% 858,405 +8.6% 0.01% $152,336,703
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 2.6% 829,862 +46% 0.03% $147,250,716
MILLENNIUM MANAGEMENT LLC 2.6% 826,376 +197% 0.11% $146,632,157
STATE STREET CORP 2.4% 764,839 -9.8% 0% $135,713,032
JPMORGAN CHASE & CO 2.4% 758,587 +73% 0.01% $134,603,787
BLAIR WILLIAM & CO/IL 2.2% 718,797 -3% 0.34% $127,543,319
EVENTIDE ASSET MANAGEMENT, LLC 2.2% 692,486 +0.14% 1.9% $122,880,468
Holocene Advisors, LP 2.1% 683,568 +44% 0.26% $121,292,306
FULLER & THALER ASSET MANAGEMENT, INC. 2% 639,423 +7.4% 0.38% $113,459,250
FMR LLC 2% 628,766 +0.75% 0.01% $111,568,179
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 1.9% 606,969 +12% 0.06% $107,700,579
BNP PARIBAS ASSET MANAGEMENT Holding S.A. 1.8% 583,014 +2.2% 0.12% $103,450,000
Stephens Investment Management Group LLC 1.6% 519,325 -0.12% 1.2% $92,149,028
PRICE T ROWE ASSOCIATES INC /MD/ 1.6% 502,120 +48% 0.01% $89,098,000
Invesco Ltd. 1.6% 498,385 +24% 0.01% $88,433,435
WELLINGTON MANAGEMENT GROUP LLP 1.3% 408,256 -3.4% 0.01% $72,440,944
Allspring Global Investments Holdings, LLC 1.3% 407,409 -2% 0.12% $71,386,205
LOOMIS SAYLES & CO L P 1.2% 392,077 +35% 0.08% $69,570,143
D. E. Shaw & Co., Inc. 1.1% 360,669 +7% 0.05% $63,997,107

Institutional Holders of iRhythm Holdings, Inc. - Common Stock, par value $0.001 per share (IRTC) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q4 35,162,791 $6,238,742,741 +$103,376,004 $177.44 331
2025 Q3 34,675,630 $5,961,418,750 -$102,787,901 $171.99 335
2025 Q2 35,390,889 $5,441,652,911 -$82,751,717 $153.96 301
2025 Q1 35,983,114 $3,768,006,864 +$183,883,851 $104.68 254
2024 Q4 34,327,817 $3,094,792,701 +$24,985,709 $90.17 226
2024 Q3 34,300,712 $2,546,184,989 -$113,241,307 $74.24 240
2024 Q2 35,528,920 $3,823,722,858 +$145,294,737 $107.64 227
2024 Q1 34,502,287 $4,002,590,157 +$189,963,417 $116.00 251
2023 Q4 32,945,986 $3,526,898,502 -$20,629,057 $107.04 222
2023 Q3 33,182,374 $3,120,212,405 -$15,033,608 $94.26 223
2023 Q2 33,299,268 $3,474,118,901 -$48,486,102 $104.32 201
2023 Q1 33,708,853 $4,180,854,132 +$324,314,586 $124.03 208
2022 Q4 31,151,995 $2,917,984,399 -$5,898,665 $93.67 204
2022 Q3 30,401,944 $3,801,930,092 +$14,889,346 $125.28 228
2022 Q2 30,387,197 $3,283,148,343 +$4,234,235 $108.03 234
2022 Q1 30,296,272 $4,768,481,076 +$216,728,151 $157.47 215
2021 Q4 29,128,389 $3,428,231,271 +$107,786,048 $117.69 208
2021 Q3 28,055,658 $1,643,173,747 -$57,734,125 $58.56 180
2021 Q2 29,024,558 $1,925,764,915 -$499,916,095 $66.35 174
2021 Q1 31,071,273 $4,314,496,144 -$544,239,396 $138.86 207
2020 Q4 33,270,792 $7,891,976,678 +$487,856,041 $237.21 227
2020 Q3 31,198,367 $7,423,363,500 +$109,682,337 $238.11 230
2020 Q2 30,796,747 $3,570,869,382 -$118,374,619 $115.89 191
2020 Q1 32,167,984 $2,614,776,733 -$40,915,934 $81.35 163
2019 Q4 32,792,937 $2,232,625,135 +$79,015,792 $68.09 166
2019 Q3 31,381,095 $2,324,687,781 +$169,769,739 $74.11 164
2019 Q2 29,027,393 $2,291,930,032 +$175,287,111 $79.08 167
2019 Q1 27,606,512 $2,068,176,987 +$103,726,376 $74.96 173
2018 Q4 25,626,800 $1,780,395,960 +$69,521,673 $69.48 157
2018 Q3 24,484,484 $2,317,685,444 -$12,892,572 $94.66 156
2018 Q2 24,692,685 $2,003,316,162 +$56,732,861 $81.13 140
2018 Q1 24,070,462 $1,515,219,109 +$112,098,945 $62.95 140
2017 Q4 23,147,057 $1,297,363,838 +$39,438,043 $56.05 116
2017 Q3 22,474,419 $1,165,964,085 +$71,946,533 $51.88 104
2017 Q2 21,196,604 $900,386,225 +$354,806,954 $42.49 99
2017 Q1 13,123,148 $493,429,902 +$123,331,655 $37.60 64
2016 Q4 10,566,406 $316,969,000 +$316,647,000 $30.00 66