iRhythm Holdings IRTC Institutional Ownership

NASDAQ IRTC

$120.66 -1.58 (-1.29%)

As of: Sep 9, 2026 · 11:23 AM EDT

Institutions by Trading Activity

308 Institutions

Increased 166 53.9%

Unchanged 50 16.2%

Reduced 92 29.9%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

109.04%

▲+0.20 pp QoQ

Shares Held by Institutions

35.87Mn

of 32.90Mn outstanding

▲+3.94% QoQ

Shares Outstanding

32.90Mn

-2.97Mn held outside 13F filers

Institutional Investors

308

filed 13F for Jun 2026

▲+8 vs prior quarter

Net Shares Added (QoQ)

+1.36Mn

accumulated since last quarter

Value of Holdings

$4.41Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

iRhythm Holdings, Inc. (NASDAQ:IRTC) has 308 institutional investors with active 13F positions as of June 2026.

These investors held 109.0% of outstanding shares in June 2026, up from 108.8% in March 2026.
They increased total shares held in iRhythm Holdings by 3.94% from the prior quarter, while the number of investors in IRTC increased 1.65% year over year.
During the quarter, 166 of these 308 funds increased positions in IRTC, 92 reduced exposure, and 50 held steady.
In total, institutional investors held 35.87Mn shares in iRhythm Holdings as of June 2026, up by 1.36Mn shares quarter on quarter, and down 109.46K shares year over year.
As of June 30, 2026, the biggest holder of iRhythm Holdings is BlackRock, Inc. at 2.99Mn shares, representing 9.08% of shares outstanding.
Top purchasers of IRTC stock for the quarter ending June 2026 included RTW INVESTMENTS, LP (514.13K), Sixth Street Partners Management Company, L.P. (298.3K), WESTFIELD CAPITAL MANAGEMENT CO LP (288.92K), BlackRock, Inc. (244.16K), Artisan Partners Limited Partnership (209.4K).
The largest sellers of iRhythm Holdings for the quarter ending June 2026 were Holocene Advisors, LP (465.02K), Point72 Asset Management, L.P. (326.24K), Invesco Ltd. (275.31K), Assenagon Asset Management S.A. (248.06K), MILLENNIUM MANAGEMENT LLC (201.56K).
Business Quant data shows the 10 biggest positions in iRhythm Holdings as of June 2026 are held by BlackRock, Inc. (2.99Mn), RTW INVESTMENTS, LP (2.18Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (1.91Mn), Artisan Partners Limited Partnership (1.66Mn), VANGUARD CAPITAL MANAGEMENT LLC (1.46Mn), MILLENNIUM MANAGEMENT LLC (1.41Mn), FMR LLC (1.19Mn), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (944.52K), GEODE CAPITAL MANAGEMENT, LLC (881.9K), EVENTIDE ASSET MANAGEMENT, LLC (880.34K).

Form 13F Holdings

308 Institutional Holders

Report period 30 Jun, 2026

Total shares held 35.87Mn

Of outstanding 109.04%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	2,985,667	9.08%	▲244,162	+8.91%	$355.15Mn
2	RTW INVESTMENTS, LP	0001493215	2,182,631	6.64%	▲514,131	+30.81%	$259.62Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,913,976	5.82%	▲117,604	+6.55%	$227.67Mn
4	Artisan Partners Limited Partnership	0001466153	1,660,307	5.05%	▲209,400	+14.43%	$197.49Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,463,211	4.45%	▲17,501	+1.21%	$174.05Mn
6	MILLENNIUM MANAGEMENT LLC	0001273087	1,406,454	4.28%	▼201,560	-12.53%	$167.30Mn
7	FMR LLC	0000315066	1,191,982	3.62%	▼169,937	-12.48%	$141.79Mn
8	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0000861177	944,517	2.87%	▼102,935	-9.83%	$112.35Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	881,899	2.68%	▲64,789	+7.93%	$104.92Mn
10	EVENTIDE ASSET MANAGEMENT, LLC	0001442891	880,338	2.68%	▲119,513	+15.71%	$104.71Mn
11	BNP Paribas Asset Management Holding S.A.	0001520354	866,528	2.63%	▲104,466	+13.71%	$103.07Mn
12	State Street Corp	0000093751	856,517	2.60%	▲68,215	+8.65%	$101.88Mn
13	Holocene Advisors, LP	0001700574	783,636	2.38%	▼465,022	-37.24%	$93.21Mn
14	Jpmorgan Chase & Co	0000019617	766,216	2.33%	▲51,320	+7.18%	$90.92Mn
15	Stephens Investment Management Group LLC	0001314440	693,437	2.11%	▲131,907	+23.49%	$82.48Mn
16	FULLER & THALER ASSET MANAGEMENT, INC.	0001082327	685,496	2.08%	▲10,798	+1.60%	$81.54Mn
17	BRAIDWELL LP	0001920938	654,262	1.99%	▲44,070	+7.22%	$77.82Mn
18	D. E. Shaw & Co., Inc.	0001009207	629,686	1.91%	▲75,420	+13.61%	$74.90Mn
19	MANUFACTURERS LIFE INSURANCE COMPANY, THE	0000928047	561,251	1.71%	▲170,674	+43.70%	$66.76Mn
20	BLAIR WILLIAM & CO/IL	0000902367	524,690	1.60%	▼103,695	-16.50%	$62.41Mn

Showing 1 to 20 of 308 holders