iRhythm Holdings IRTC Institutional Ownership

NASDAQ IRTC

$119.64 +6.09 (+5.36%)

At close: Oct 22, 2026 · 4:00 PM EDT

Institutions by Trading Activity

308 Institutions

Increased 166 53.9%

Unchanged 49 15.9%

Reduced 93 30.2%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

—

13F totals exceed reported shares outstanding

Shares Held by Institutions

35.57Mn

of 32.94Mn outstanding

▲+0.59% QoQ

Shares Outstanding

32.94Mn

Institutional Investors

308

filed 13F for Jun 2026

▲+7 vs prior quarter

Net Shares Added (QoQ)

+209.78K

accumulated since last quarter

Value of Holdings

$4.04Bn

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

Updated Oct 21, 2026

iRhythm Holdings, Inc. (NASDAQ:IRTC) counted 308 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

Total shares held in IRTC rose 0.59% from Q1 2026; the number of holders rose 2.67% from Q2 2025.
Among the 308 holders of iRhythm Holdings, 166 added to their positions, 93 reduced their stakes and 49 left their positions unchanged.
Institutional investors held 35.57Mn shares of iRhythm Holdings in total at the end of Q2 2026, up 209.78K from the prior quarter and up 463.53K from a year earlier.
BlackRock, Inc. held the largest position in IRTC at 2.99Mn shares as of June 30, 2026.
Holders that added the most shares of iRhythm Holdings in Q2 2026 were RTW Investments, LP (+514.13K shares), BlackRock, Inc. (+244.16K shares), Artisan Partners Limited Partnership (+209.4K shares), Schroder Investment Management Group (+200.51K shares) and Manufacturers Life Insurance Company, The (+170.67K shares).
The biggest cuts to IRTC positions during Q2 2026 came from Holocene Advisors, LP (-465.02K shares), Point72 Asset Management, L.P. (-326.24K shares), Invesco Ltd. (-275.31K shares), Assenagon Asset Management S.A. (-248.06K shares) and Millennium Management LLC (-201.56K shares).
Per Business Quant, the top 10 investors in IRTC for the quarter ended June 30, 2026 were BlackRock, Inc. (2.99Mn shares), RTW Investments, LP (2.18Mn shares), Vanguard Portfolio Management LLC (1.91Mn shares), Artisan Partners Limited Partnership (1.66Mn shares), Vanguard Capital Management LLC (1.46Mn shares), Millennium Management LLC (1.41Mn shares), FMR LLC (1.19Mn shares), UBS Asset Management Americas (944.52K shares), Geode Capital Management, LLC (881.9K shares) and Eventide Asset Management, LLC (880.34K shares).

Form 13F Holdings

309 Institutional Holders

Report period 30 Jun, 2026

Total shares held 35.57Mn

Of outstanding —

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	2,985,667	9.06%	▲244,162	+8.91%	$355.15Mn
2	RTW INVESTMENTS, LP	0001493215	2,182,631	6.63%	▲514,131	+30.81%	$259.62Mn
3	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	1,913,976	5.81%	▲117,604	+6.55%	$227.67Mn
4	Artisan Partners Limited Partnership	0001466153	1,660,307	5.04%	▲209,400	+14.43%	$197.49Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	1,463,211	4.44%	▲17,501	+1.21%	$174.05Mn
6	MILLENNIUM MANAGEMENT LLC	0001273087	1,406,454	4.27%	▼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	2.67%	▲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	2.10%	▲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	1.70%	▲170,674	+43.70%	$66.76Mn
20	BLAIR WILLIAM & CO/IL	0000902367	524,690	1.59%	▼103,695	-16.50%	$62.41Mn

Showing 1 to 20 of 309 holders