iRhythm Holdings, Inc. (IRTC) — Institutional Holders, Q2 2026

334 institutional investment managers reported a IRTC position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $5.0B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← IRTC stock profile

IRTC in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

Added to

128

Trimmed

Sold out

Biggest buyers

RTW INVESTMENTSAdded · +514,131 sh+$61.2M
BANK OF AMERICAAdded · +455,180 sh+$54.1M
BARCLAYS PLCAdded · +313,453 sh+$37.3M
WESTFIELD CAPITAL MANAGEMENTNew · +288,924 sh+$34.4M
Artisan Partners Limited PartnershipAdded · +209,400 sh+$24.9M

Biggest sellers

Holocene AdvisorsTrimmed · -465,022 sh-$55.3M
MORGAN STANLEYTrimmed · -389,801 sh-$46.4M
MACKENZIE FINANCIALSold out · -371,475 sh-$44.2M
Assenagon Asset Management S.A.Trimmed · -248,060 sh-$29.5M
Capital Research Global InvestorsTrimmed · -174,381 sh-$20.7M

IRTC 13F holders ranked 1–100 of 334

Institutional investors reporting a position in iRhythm Holdings, Inc. on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 33,865,667 sh	33,865,667	$389.0M	<0.01%	-43.6%
2	RTW INVESTMENTS#2 · 2,182,631 sh	2,182,631	$259.6M	2.22%	+30.8%
3	VANGUARD PORTFOLIO MANAGEMENT#3 · 1,913,976 sh	1,913,976	$227.7M	0.01%	+6.5%
4	Artisan Partners Limited Partnership#4 · 1,660,307 sh	1,660,307	$197.5M	0.31%	+14.4%
5	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#5 · 60,244,517 sh	60,244,517	$177.4M	0.03%	+5651.5%
6	VANGUARD CAPITAL MANAGEMENT#6 · 1,463,211 sh	1,463,211	$174.0M	<0.01%	+1.2%
7	MILLENNIUM MANAGEMENT#7 · 1,406,454 sh	1,406,454	$167.3M	0.06%	-88.8%
8	FMR#8 · 8,824,982 sh	8,824,982	$150.2M	<0.01%	-2.4%
9	STATE STREET#9 · 17,716,517 sh	17,716,517	$120.5M	<0.01%	+22.2%
10	BNP Paribas Asset Management Holding S.A.#10 · 3,366,528 sh	3,366,528	$105.8M	0.11%	+3.2%
11	GEODE CAPITAL MANAGEMENT#11 · 881,899 sh	881,899	$104.9M	<0.01%	+7.9%
12	EVENTIDE ASSET MANAGEMENT#12 · 880,338 sh	880,338	$104.7M	1.40%	+15.7%
13	TENOR CAPITAL MANAGEMENT , L.P.#13 · 87,500,000 sh	87,500,000	$97.1M	1.37%	+2.9%
14	JPMORGAN CHASE#14 · 4,588,216 sh	4,588,216	$95.1M	<0.01%	-58.5%
15	Holocene Advisors#15 · 783,636 sh	783,636	$93.2M	0.21%	-37.2%
16	Stephens Investment Management Group#16 · 693,437 sh	693,437	$82.5M	0.88%	+23.5%
17	FULLER & THALER ASSET MANAGEMENT#17 · 685,496 sh	685,496	$81.5M	0.22%	+1.6%
18	BRAIDWELL#18 · 654,262 sh	654,262	$77.8M	2.88%	+7.2%
19	D. E. Shaw#19 · 629,686 sh	629,686	$74.9M	0.04%	+13.6%
20	WOLVERINE ASSET MANAGEMENT#20 · 66,375,000 sh	66,375,000	$73.2M	0.64%	+41.2%
21	MANUFACTURERS LIFE INSURANCE COMPANY, THE#21 · 561,251 sh	561,251	$66.8M	0.05%	+43.7%
22	BLAIR WILLIAM#22 · 524,690 sh	524,690	$62.4M	0.16%	-16.5%
23	BANK OF AMERICA#23 · 887,719 sh	887,719	$55.9M	<0.01%	+105.2%
24	Polar Capital Plc#24 · 458,089 sh	458,089	$54.5M	0.13%	+8.7%
25	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#25 · 450,865 sh	450,865	$53.6M	0.02%	-22.6%
26	SCHRODER INVESTMENT MANAGEMENT GROUP#26 · 448,259 sh	448,259	$53.1M	0.04%	+80.9%
27	ADVENT CAPITAL MANAGEMENT#27 · 47,419,000 sh	47,419,000	$52.5M	1.18%	New
28	LMR Partners LLP#28 · 42,500,000 sh	42,500,000	$46.8M	0.17%	+41.7%
29	CITADEL ADVISORS#29 · 31,675,931 sh	31,675,931	$46.3M	<0.01%	New
30	Opti Capital Management#30 · 41,000,000 sh	41,000,000	$45.3M	2.77%	+17.1%
31	AMERIPRISE FINANCIAL#31 · 9,192,513 sh	9,192,513	$44.6M	<0.01%	+0.6%
32	GOLDMAN SACHS GROUP#32 · 362,346 sh	362,346	$43.1M	<0.01%	-91.6%
33	DeepCurrents Investment Group#33 · 38,500,000 sh	38,500,000	$42.5M	1.29%	+11.6%
34	STEELHEAD PARTNERS#34 · 38,122,000 sh	38,122,000	$42.1M	3.00%	+5.5%
35	LOOMIS SAYLES & L P#35 · 347,959 sh	347,959	$41.4M	0.05%	-5.4%
36	Capital Research Global Investors#36 · 335,209 sh	335,209	$39.9M	<0.01%	-34.2%
37	Allspring Global Investments#37 · 300,057 sh	300,057	$37.4M	0.06%	-35.8%
38	NORTHERN#38 · 307,995 sh	307,995	$36.6M	<0.01%	+8.0%
39	MACKAY SHIELDS#39 · 32,598,000 sh	32,598,000	$35.9M	—	-0.1%
40	CHARLES SCHWAB INVESTMENT MANAGEMENT#40 · 298,301 sh	298,301	$35.5M	<0.01%	+5.8%
41	WESTFIELD CAPITAL MANAGEMENT#41 · 288,924 sh	288,924	$34.4M	0.11%	New
42	JANE STREET GROUP#42 · 275,262 sh	275,262	$32.7M	<0.01%	-81.8%
43	Point72 Asset Management, L.P.#43 · 273,162 sh	273,162	$32.5M	0.04%	-99.2%
44	Qube Research & Technologies Ltd#44 · 271,624 sh	271,624	$32.3M	0.03%	+19.7%
45	Rock Springs Capital Management#45 · 269,650 sh	269,650	$32.1M	1.57%	+3.0%
46	CITIGROUP#46 · 249,404 sh	249,404	$29.7M	<0.01%	-95.3%
47	DEUTSCHE BANK AG\#47 · 238,193 sh	238,193	$28.3M	<0.01%	+10.4%
48	VANGUARD FIDUCIARY#48 · 235,963 sh	235,963	$28.1M	<0.01%	+5.5%
49	PERCEPTIVE ADVISORS#49 · 223,766 sh	223,766	$26.6M	0.40%	+113.1%
50	FRED ALGER MANAGEMENT#50 · 220,789 sh	220,789	$26.3M	0.09%	-21.2%
51	TUDOR INVESTMENT ET AL#51 · 21,750,000 sh	21,750,000	$24.0M	0.03%	+8.8%
52	OBERWEIS ASSET MANAGEMENT#52 · 202,004 sh	202,004	$24.0M	0.50%	+29.5%
53	Ophir Asset Management Pty Ltd#53 · 201,491 sh	201,491	$24.0M	1.97%	-40.0%
54	BARCLAYS PLC#54 · 501,798 sh	501,798	$23.2M	<0.01%	+166.4%
55	NEXT CENTURY GROWTH INVESTORS#55 · 187,064 sh	187,064	$22.3M	1.18%	+10.5%
56	BAMCO#56 · 181,430 sh	181,430	$21.6M	0.03%	-1.3%
57	SEI INVESTMENTS#57 · 447,765 sh	447,765	$21.6M	0.02%	-4.3%
58	First Light Asset Management#58 · 167,092 sh	167,092	$19.9M	1.21%	-0.6%
59	MASSACHUSETTS FINANCIAL SERVICES#59 · 165,998 sh	165,998	$19.7M	<0.01%	-0.4%
60	Prosight Management#60 · 165,500 sh	165,500	$19.7M	3.39%	+1555.0%
61	Schonfeld Strategic Advisors#61 · 152,062 sh	152,062	$18.1M	0.06%	+72.5%
62	MORGAN STANLEY#62 · 159,998 sh	159,998	$17.6M	<0.01%	-70.9%
63	NORGES BANK#63 · 148,072 sh	148,072	$17.6M	<0.01%	—
64	TimesSquare Capital Management#64 · 137,311 sh	137,311	$16.3M	0.24%	+51.5%
65	RAYMOND JAMES FINANCIAL#65 · 135,265 sh	135,265	$16.1M	<0.01%	-6.8%
66	FRONTIER CAPITAL MANAGEMENT#66 · 132,475 sh	132,475	$15.8M	0.15%	+93.5%
67	Universal- Beteiligungs- und Servicegesellschaft mbH#67 · 12,633,803 sh	12,633,803	$15.6M	0.02%	New
68	Bank of New York Mellon#68 · 318,768 sh	318,768	$14.3M	<0.01%	+3.6%
69	Nuveen#69 · 113,918 sh	113,918	$13.6M	<0.01%	+2.0%
70	Mirabaud Asset Management (France) SAS#70 · 11,660,000 sh	11,660,000	$12.9M	5.79%	New
71	SEGALL BRYANT & HAMILL#71 · 107,467 sh	107,467	$12.8M	0.15%	New
72	USS Investment Management Ltd#72 · 106,957 sh	106,957	$12.7M	0.05%	New
73	WCM INVESTMENT MANAGEMENT#73 · 107,000 sh	107,000	$12.7M	0.02%	-1.0%
74	Champlain Investment Partners#74 · 97,015 sh	97,015	$11.5M	0.30%	New
75	Trexquant Investment#75 · 96,268 sh	96,268	$11.5M	0.07%	-13.5%
76	FEDERATED HERMES#76 · 95,871 sh	95,871	$11.4M	0.02%	-35.9%
77	NEW YORK STATE COMMON RETIREMENT FUND#77 · 92,993 sh	92,993	$11.1M	0.01%	-9.4%
78	Integral Health Asset Management#78 · 90,000 sh	90,000	$10.7M	0.42%	New
79	WELLINGTON MANAGEMENT GROUP LLP#79 · 88,257 sh	88,257	$10.5M	<0.01%	-2.4%
80	PenderFund Capital Management Ltd.#80 · 9,260,000 sh	9,260,000	$10.2M	1.31%	New
81	SILVERCREST ASSET MANAGEMENT GROUP#81 · 85,830 sh	85,830	$10.2M	0.07%	+39.2%
82	Granahan Investment Management#82 · 83,903 sh	83,903	$10.0M	0.36%	-12.6%
83	STATE OF WISCONSIN INVESTMENT BOARD#83 · 4,044,699 sh	4,044,699	$9.7M	0.02%	+32.7%
84	C WorldWide Group Holding A/S#84 · 80,000 sh	80,000	$9.5M	0.23%	0.0%
85	UBS Group AG#85 · 113,665 sh	113,665	$9.3M	<0.01%	+4.4%
86	PEREGRINE CAPITAL MANAGEMENT#86 · 75,724 sh	75,724	$9.0M	0.29%	+15.0%
87	Squarepoint Ops#87 · 71,862 sh	71,862	$8.5M	<0.01%	+1065.8%
88	JENNISON ASSOCIATES#88 · 67,924 sh	67,924	$8.1M	<0.01%	-50.4%
89	Parkman Healthcare Partners#89 · 67,267 sh	67,267	$8.0M	0.82%	+67.6%
90	Legal & General Group Plc#90 · 65,304 sh	65,304	$7.8M	<0.01%	+26.6%
91	PFM Health Sciences#91 · 65,196 sh	65,196	$7.8M	0.67%	New
92	Swiss National Bank#92 · 64,800 sh	64,800	$7.7M	<0.01%	+1.7%
93	Neuberger Berman Group#93 · 63,343 sh	63,343	$7.5M	<0.01%	+3342.6%
94	Man Group plc#94 · 1,918,362 sh	1,918,362	$7.2M	0.01%	+22.7%
95	PRINCIPAL FINANCIAL GROUP#95 · 59,733 sh	59,733	$7.1M	<0.01%	+11.7%
96	Amundi#96 · 56,534 sh	56,534	$6.7M	<0.01%	+14.0%
97	Verition Fund Management#97 · 55,987 sh	55,987	$6.7M	<0.01%	+62.0%
98	Lombard Odier Asset Management (Europe) Ltd#98 · 5,828,000 sh	5,828,000	$6.5M	0.28%	0.0%
99	HealthInvest Partners AB#99 · 54,102 sh	54,102	$6.4M	1.73%	+142.4%
100	WELLS FARGO & COMPANY#100 · 647,903 sh	647,903	$6.4M	<0.01%	+2.2%

Funds that sold out of IRTC in Q2 2026 (44)

Held IRTC at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held IRTC in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
MACKENZIE FINANCIAL371,475 sh	371,475	$43.8M
Alberta Investment Management20,000,000 sh	20,000,000	$22.0M
HEALTHCARE OF ONTARIO PENSION PLAN FUND13,000,000 sh	13,000,000	$14.2M
READYSTATE ASSET MANAGEMENT10,000,000 sh	10,000,000	$11.0M
M&G Plc85,062 sh	85,062	$10.0M
THRIVENT FINANCIAL FOR LUTHERANS75,162 sh	75,162	$8.9M
TWO SIGMA INVESTMENTS52,600 sh	52,600	$6.2M
Jump Financial44,984 sh	44,984	$5.3M
LINDEN ADVISORS4,086,000 sh	4,086,000	$4.5M
Hillsdale Investment Management34,950 sh	34,950	$4.1M
KCM Capital30,000 sh	30,000	$3.5M
HUSSMAN STRATEGIC ADVISORS29,400 sh	29,400	$3.5M
CASTLEARK MANAGEMENT27,193 sh	27,193	$3.2M
Warberg Asset Management2,000,000 sh	2,000,000	$2.2M
CONGRESS ASSET MANAGEMENT16,461 sh	16,461	$1.9M
Corient Private Wealth15,344 sh	15,344	$1.8M
RE ADVISERS13,300 sh	13,300	$1.6M
OAKTREE CAPITAL MANAGEMENT1,350,000 sh	1,350,000	$1.5M
ADAGE CAPITAL PARTNERS GP, L.L.C.8,289 sh	8,289	$978.3K
MRA Advisory Group3,210 sh	3,210	$378.9K
Blueshift Asset Management3,063 sh	3,063	$361.5K
TRUIST FINANCIAL2,709 sh	2,709	$319.7K
Vise Technologies1,727 sh	1,727	$306.4K
PRAXIS INVESTMENT MANAGEMENT2,590 sh	2,590	$306.0K
ACADIAN ASSET MANAGEMENT2,407 sh	2,407	$284.0K
AXQ CAPITAL2,172 sh	2,172	$256.3K
Frank, Rimerman Advisors2,045 sh	2,045	$241.4K
KEYBANK NATIONAL ASSOCIATION1,847 sh	1,847	$218.0K
SeaCrest Wealth Management1,830 sh	1,830	$216.0K
DRW Securities1,755 sh	1,755	$207.1K
VAN ECK ASSOCIATES1,407 sh	1,407	$166.0K
Walleye Trading821 sh	821	$96.9K
ANTIPODES PARTNERS Ltd655 sh	655	$77.3K
Root Financial Partners182 sh	182	$21.5K
Balboa Wealth Partners11,000 sh	11,000	$12.0K
NORTHWESTERN MUTUAL WEALTH MANAGEMENT72 sh	72	$8.5K
MAI Capital Management18 sh	18	$2.1K
FIRST HORIZON NATIONAL14 sh	14	$1.7K
TWIN PEAKS WEALTH ADVISORS8 sh	8	$944.00
Physician Wealth Advisors4 sh	4	$473.00
CENTRAL4 sh	4	$473.00
Godfrey Financial Associates3 sh	3	$354.00
Ronald Blue2 sh	2	$236.00
Elequin Securities25 sh	25	—

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.