Who owns iRhythm Holdings, Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of IRTC from SEC Form 13F filings across 305 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 305 institutions disclosed 35.6M shares of iRhythm Holdings, Inc. worth $4.24B — about 108.3% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
305
13F holders
$4.24B
value, 2026 filers
108.3%
of shares outstanding (35.6M sh)
48
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of IRTC's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 3.0M | $355.1M | 0.0% | 9.1% | +8.9% |
| 2 | RTW INVESTMENTS, LP | 2.2M | $259.6M | 2.2% | 6.6% | +30.8% |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | 1.9M | $227.7M | 0.0% | 5.8% | +6.5% |
| 4 | Artisan Partners Limited Partnership | 1.7M | $197.5M | 0.3% | 5% | +14.4% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | $174.0M | 0.0% | 4.4% | +1.2% |
| 6 | MILLENNIUM MANAGEMENT LLC | 1.4M | $167.3M | 0.1% | 4.3% | -12.5% |
| 7 | FMR LLC | 1.2M | $141.8M | 0.0% | 3.6% | -12.5% |
| 8 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 944,517 | $112.4M | 0.0% | 2.9% | -9.8% |
| 9 | GEODE CAPITAL MANAGEMENT, LLC | 881,899 | $104.9M | 0.0% | 2.7% | +7.9% |
| 10 | EVENTIDE ASSET MANAGEMENT, LLC | 880,338 | $104.7M | 1.4% | 2.7% | +15.7% |
| 11 | BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 866,528 | $103.1M | 0.1% | 2.6% | +13.7% |
| 12 | STATE STREET CORP | 856,517 | $101.9M | 0.0% | 2.6% | +8.7% |
| 13 | Holocene Advisors, LP | 783,636 | $93.2M | 0.2% | 2.4% | -37.2% |
| 14 | JPMORGAN CHASE & CO | 766,216 | $90.9M | 0.0% | 2.3% | +7.2% |
| 15 | Stephens Investment Management Group LLC | 693,437 | $82.5M | 0.9% | 2.1% | +23.5% |
| 16 | FULLER & THALER ASSET MANAGEMENT, INC. | 685,496 | $81.5M | 0.2% | 2.1% | +1.6% |
| 17 | BRAIDWELL LP | 654,262 | $77.8M | 2.9% | 2% | +7.2% |
| 18 | D. E. Shaw & Co., Inc. | 629,686 | $74.9M | 0.0% | 1.9% | +13.6% |
| 19 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 561,251 | $66.8M | 0.1% | 1.7% | +43.7% |
| 20 | BLAIR WILLIAM & CO/IL | 524,690 | $62.4M | 0.2% | 1.6% | -16.5% |
| 21 | BANK OF AMERICA CORP /DE/ | 465,719 | $55.4M | 0.0% | 1.4% | +7.7% |
| 22 | Polar Capital Holdings Plc | 458,089 | $54.5M | 0.1% | 1.4% | +8.7% |
| 23 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 450,865 | $53.6M | 0.0% | 1.4% | -22.6% |
| 24 | SCHRODER INVESTMENT MANAGEMENT GROUP | 448,259 | $53.1M | 0.0% | 1.4% | +80.9% |
| 25 | GOLDMAN SACHS GROUP INC | 362,346 | $43.1M | 0.0% | 1.1% | +4.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.