iRhythm Holdings, Inc. (IRTC) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

32,575,000Shares Outstanding

464,166Shares held by institutions

$68,845,101Value of institutional holdings

103.23%Institutional ownership %

3.09%Shares Changed QoQ

318No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 318 institutional investors hold a position in iRhythm Holdings, Inc. (NASDAQ:IRTC).

These investors collectively held 103.2% of the company's total shares outstanding in December 2025, down from 168.5% in September 2025.
On a quarter-over-quarter basis, institutional holdings shifted by 3.09%, with a year-over-year an increase of 41.33% in the count of filers.
Among the 318 institutional holders of iRhythm Holdings, 146 added to their stakes while 117 trimmed their positions and 55 held steady.
Collectively, institutional investors increased their stake in iRhythm Holdings to 33.63Mn shares as of December 2025, a change that is up by 1.01Mn shares quarter on quarter and down 909.75K shares year over year.
With 3.31Mn shares, VANGUARD GROUP INC commands the largest institutional position in iRhythm Holdings as of December 31, 2025, equating to 10.16% of the company.
Among the most significant buyers of iRhythm Holdings during December 2025 were RTW INVESTMENTS, LP (1.18Mn), MILLENNIUM MANAGEMENT LLC (548.52K), JPMORGAN CHASE & CO (319.15K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (259.80K), Holocene Advisors, LP (210.29K).
Leading sellers of iRhythm Holdings stock in December 2025 included Artisan Partners Limited Partnership (1.06Mn), SANDS CAPITAL MANAGEMENT, LLC (536.47K), Man Group plc (150.22K), Point72 Asset Management, L.P. (128.64K), ROYAL BANK OF CANADA (125.90K).
The top 10 institutional holders of iRhythm Holdings for the quarter ending December 2025 included VANGUARD GROUP INC (3.31Mn), BlackRock, Inc. (2.81Mn), SANDS CAPITAL MANAGEMENT, LLC (1.70Mn), Artisan Partners Limited Partnership (1.51Mn), Capital Research Global Investors (1.18Mn), RTW INVESTMENTS, LP (1.18Mn), GEODE CAPITAL MANAGEMENT, LLC (858.40K), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (829.86K), MILLENNIUM MANAGEMENT LLC (826.38K), STATE STREET CORP (764.84K).

318 Institutional Holders

464,166 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
VANGUARD GROUP INC	31 Dec, 2025	3,310,519	70,420	2.17%	$587,418,492.00
BlackRock, Inc.	31 Dec, 2025	2,813,989	-61,487	-2.14%	$499,314,164.00
SANDS CAPITAL MANAGEMENT, LLC	31 Dec, 2025	1,699,645	-536,465	-23.99%	$301,585,009.00
Artisan Partners Limited Partnership	31 Dec, 2025	1,511,992	-1,055,521	-41.11%	$268,287,790.00
Capital Research Global Investors	31 Dec, 2025	1,184,746	1,010	0.09%	$210,221,330.00
RTW INVESTMENTS, LP	31 Dec, 2025	1,181,990	1,181,990	0.00%	$209,732,306.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	858,405	68,301	8.64%	$152,336,703.00
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	31 Dec, 2025	829,862	259,800	45.57%	$147,250,716.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	826,376	548,519	197.41%	$146,632,157.00
STATE STREET CORP	31 Dec, 2025	764,839	-83,039	-9.79%	$135,713,032.00
JPMORGAN CHASE & CO	31 Dec, 2025	758,587	319,149	72.63%	$134,603,787.00
BLAIR WILLIAM & CO/IL	31 Dec, 2025	718,797	-21,924	-2.96%	$127,543,319.00
EVENTIDE ASSET MANAGEMENT, LLC	31 Dec, 2025	692,486	974	0.14%	$122,880,468.00
Holocene Advisors, LP	31 Dec, 2025	683,568	210,288	44.43%	$121,292,306.00
FULLER & THALER ASSET MANAGEMENT, INC.	31 Dec, 2025	639,423	44,175	7.42%	$113,459,250.00
FMR LLC	31 Dec, 2025	628,766	4,671	0.75%	$111,568,179.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	606,969	65,930	12.19%	$107,700,579.00
BNP Paribas Asset Management Holding S.A.	31 Dec, 2025	583,014	12,760	2.24%	$103,450.00
Stephens Investment Management Group LLC	31 Dec, 2025	519,325	-633	-0.12%	$92,149,028.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	408,256	-14,406	-3.41%	$72,440,944.00

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