iRhythm Holdings, Inc. 13F holders
305 funds reported a position in iRhythm Holdings, Inc. in their 13F for the quarter ended 30 June 2026, together 35.7 million shares worth $4.24 billion. Against the quarter before, 34 opened a position, 121 added, 89 trimmed and 41 sold out; together they bought a net 196,903 shares. The largest holders: BlackRock, Inc., RTW Investments, LP and Vanguard Portfolio Management LLC.
Funds holding305-1 on Q1 2026
Shares they held35.7Mworth $4.24 billion
Net bought on the quarter196,903 sharesabout $23.4 million at the funds' values
Funds buying to selling155 to 130opened or added, to cut or sold
Opened 34Added 121Held 58Trimmed 89Sold out 41
What each fund did in IRTC against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in IRTC in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
2,671 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 44 reported a position in iRhythm Holdings, Inc.: 4 opened one, 15 added, 10 trimmed and 6 sold out, a net 17,703 shares sold.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 8 reported a position in iRhythm Holdings, Inc. in a 13F for the quarter ended 30 June 2026. The largest: Millennium Management, 1.4 million shares worth $167.3 million, 0.1% of its reported book. Sold out: Two Sigma Investments. In the quarter, 1 fund added or opened a position and 7 trimmed or sold out; together they sold a net 892,901 shares, about $106.2 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Millennium Management | 1,406,454 | $167.3 million | 0.1% | -201,560 | trimmed | 30 June 2026 | 13F |
| FMR LLC | 1,191,982 | $141.8 million | 0.0% | -169,937 | trimmed | 30 June 2026 | 13F |
| Geode Capital Management | 881,899 | $104.9 million | 0.0% | +64,789 | added | 30 June 2026 | 13F |
| Capital Research Global Investors | 335,209 | $39.9 million | 0.0% | -174,381 | trimmed | 30 June 2026 | 13F |
| Point72 Asset Management | 273,162 | $32.5 million | 0.1% | -326,243 | trimmed | 30 June 2026 | 13F |
| Norges Bank | 148,072 | $17.6 million | 0.0% | held | 30 June 2026 | 13F | |
| Citadel Advisors | 95,931 | $11.4 million | 0.0% | -17,669 | trimmed | 30 June 2026 | 13F |
| Renaissance Technologies | 38,500 | $4.6 million | 0.0% | -15,300 | trimmed | 30 June 2026 | 13F |
| Two Sigma Investments | 0 | $0 | 0.0% | -52,600 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 2,985,667 | 8.37% | $355.1 million | 0.01% | +244,162 | 13F |
| RTW Investments, LP | 2,182,631 | 6.12% | $259.6 million | 2.22% | +514,131 | 13F |
| Vanguard Portfolio Management LLC | 1,913,976 | 5.37% | $227.7 million | 0.01% | +117,604 | 13F |
| Artisan Partners Limited Partnership | 1,660,307 | 4.66% | $197.5 million | 0.32% | +209,400 | 13F |
| Vanguard Capital Management LLC | 1,463,211 | 4.10% | $174.0 million | 0.00% | +17,501 | 13F |
| Millennium Management LLC | 1,406,454 | 3.94% | $167.3 million | 0.12% | -201,560 | 13F |
| FMR LLC | 1,191,982 | 3.34% | $141.8 million | 0.01% | -169,937 | 13F |
| UBS AM, a distinct business unit of UBS Asset Management Americas LLC | 944,517 | 2.65% | $112.4 million | 0.02% | -102,935 | 13F |
| Geode Capital Management, LLC | 881,899 | 2.47% | $104.9 million | 0.01% | +64,789 | 13F |
| Eventide Asset Management, LLC | 880,338 | 2.47% | $104.7 million | 1.40% | +119,513 | 13F |
| BNP Paribas Asset Management Holding S.A. | 866,528 | 2.43% | $103.1 million | 0.10% | +104,466 | 13F |
| State Street Corp. | 856,517 | 2.40% | $101.9 million | 0.00% | +68,215 | 13F |
| Holocene Advisors, LP | 783,636 | 2.20% | $93.2 million | 0.21% | -465,022 | 13F |
| JPMorgan Chase & Co. | 766,216 | 2.15% | $90.9 million | 0.01% | +51,320 | 13F |
| Stephens Investment Management Group LLC | 693,437 | 1.94% | $82.5 million | 0.88% | +131,907 | 13F |
| Fuller & Thaler Asset Management, Inc. | 685,496 | 1.92% | $81.5 million | 0.22% | +10,798 | 13F |
| Braidwell LP | 654,262 | 1.84% | $77.8 million | 2.99% | +44,070 | 13F |
| D. E. Shaw & Co., Inc. | 629,686 | 1.77% | $74.9 million | 0.05% | +75,420 | 13F |
| Manufacturers Life Insurance Company, the | 561,251 | 1.57% | $66.8 million | 0.05% | +170,674 | 13F |
| Blair William & Co. | 524,690 | 1.47% | $62.4 million | 0.16% | -103,695 | 13F |
| Bank of America Corp. | 465,719 | 1.31% | $55.4 million | 0.00% | +33,180 | 13F |
| Polar Capital Holdings Plc | 458,089 | 1.28% | $54.5 million | 0.15% | +36,477 | 13F |
| Arrowstreet Capital, Limited Partnership | 450,865 | 1.26% | $53.6 million | 0.02% | -132,014 | 13F |
| Schroder Investment Management Group | 448,259 | 1.26% | $53.1 million | 0.04% | +200,513 | 13F |
| Goldman Sachs Group Inc. | 362,346 | 1.02% | $43.1 million | 0.01% | +13,783 | 13F |
| Loomis Sayles & Co. L P | 347,959 | 0.98% | $41.4 million | 0.05% | -19,935 | 13F |
| Capital Research Global Investors | 335,209 | 0.94% | $39.9 million | 0.01% | -174,381 | 13F |
| Allspring Global Investments Holdings, LLC | 300,057 | 0.84% | $37.4 million | 0.06% | -167,056 | 13F |
| Northern Trust Corp. | 307,995 | 0.86% | $36.6 million | 0.00% | +22,909 | 13F |
| Charles Schwab Investment Management Inc. | 298,301 | 0.84% | $35.5 million | 0.01% | +16,404 | 13F |
| Ameriprise Financial Inc. | 292,513 | 0.82% | $34.8 million | 0.01% | +55,727 | 13F |
| Westfield Capital Management Co. LP | 288,924 | 0.81% | $34.4 million | 0.11% | new | 13F |
| Jane Street Group, LLC | 275,262 | 0.77% | $32.7 million | 0.02% | +162,398 | 13F |
| Point72 Asset Management, L.P. | 273,162 | 0.77% | $32.5 million | 0.05% | -326,243 | 13F |
| Qube Research & Technologies Ltd | 271,624 | 0.76% | $32.3 million | 0.04% | +44,740 | 13F |
| Rock Springs Capital Management LP | 269,650 | 0.76% | $32.1 million | 1.57% | +7,900 | 13F |
| Citigroup Inc. | 249,404 | 0.70% | $29.7 million | 0.01% | +17,281 | 13F |
| Deutsche Bank AG | 238,193 | 0.67% | $28.3 million | 0.01% | +22,435 | 13F |
| Vanguard Fiduciary Trust Co. | 235,963 | 0.66% | $28.1 million | 0.01% | +12,264 | 13F |
| Perceptive Advisors LLC | 223,766 | 0.63% | $26.6 million | 0.41% | +118,740 | 13F |
| Fred Alger Management, LLC | 220,789 | 0.62% | $26.3 million | 0.09% | -59,251 | 13F |
| Oberweis Asset Management Inc. | 202,004 | 0.57% | $24.0 million | 0.50% | +46,000 | 13F |
| Ophir Asset Management Pty Ltd | 201,491 | 0.57% | $24.0 million | 1.97% | -134,316 | 13F |
| Barclays PLC | 191,798 | 0.54% | $22.8 million | 0.01% | +3,453 | 13F |
| Next Century Growth Investors LLC | 187,064 | 0.52% | $22.3 million | 1.18% | +17,758 | 13F |
| Bamco Inc. | 181,430 | 0.51% | $21.6 million | 0.03% | -2,470 | 13F |
| Sei Investments Co. | 178,765 | 0.50% | $21.3 million | 0.02% | -20,139 | 13F |
| First Light Asset Management, LLC | 167,092 | 0.47% | $19.9 million | 1.21% | -1,024 | 13F |
| Massachusetts Financial Services Co. | 165,998 | 0.47% | $19.7 million | 0.01% | -639 | 13F |
| Prosight Management, LP | 165,500 | 0.46% | $19.7 million | 3.39% | +155,500 | 13F |
The 50 largest of the 305 funds that reported a position in IRTC in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on IRTC
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 24,500 | $2.9 million | 30 June 2026 | 13F |
| Citadel Advisors | Calls | 16,800 | $2.0 million | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 13 October 2026 | 13G/A | Millennium Management LLC and 5 others | 349,087 | 1.1% | 30 September 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 14 August 2026 | 13G/A | RTW Investments, LP and 3 others | 2.2 million | 6.6% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 13 August 2026 | 13G | Artisan Partners Asset Management Inc. and 7 others | 1.7 million | 5.1% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 May 2026 | 13G | RTW Investments, LP and 3 others | 1.7 million | 5.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 8 May 2026 | 13G/A | Sands Capital Management, LLC and 3 others | 0 | 0.0% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 28 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 1.8 million | 5.6% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 April 2026 | 13G | Vanguard Capital Management and 1 other | 1.7 million | 5.2% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 23 March 2026 | 13G | Millennium Management LLC and 5 others | 1.7 million | 5.1% | 16 March 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 13 February 2026 | 13G/A | Sands Capital Management, LLC and 3 others | 1.7 million | 5.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 3 February 2026 | 13G/A | Artisan Partners Asset Management Inc. and 7 others | 1.5 million | 4.7% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 13 November 2025 | 13G/A | Sands Capital Management, LLC and 3 others | 2.2 million | 6.9% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 18 September 2026 | 72 | $111.75 | SEC |
| 16 September 2026 | 31 | $111.88 | SEC |
| 10 September 2026 | 186 | $119.57 | SEC |
| 21 August 2026 | 1,114 | $127.98 | SEC |
| 20 August 2026 | 1,057 | $124.75 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.