IRHYTHM TECHNOLOGIES INC (IRTC) Institutional Shareholders
IRHYTHM TECHNOLOGIES INC (IRTC) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $4.05B in IRTC holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of IRTC tracked by InsiderSet, reporting ownership valued at approximately $323.55M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $326.46M, representing an estimated gain of +0.90% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 44% of the total disclosed IRTC value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, Rtw Investments, Lp, and several other long-term asset managers with concentrated positions in IRHYTHM TECHNOLOGIES INC (IRTC).
This page ranks the largest institutional IRTC shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
297
Total Reported Value
$4.05B
Largest Holder
Blackrock, Inc.
Largest Position
$323.55M
Insider Transactions (90d)
17
Latest Filing Quarter
Q2 2026
New Institutional Positions
52
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.01% | 2,741,505 | $323,552,391 | $326,458,415 | +$2,906,024 | +0.90% | |
| Vanguard Portfolio Management Llc | 0.01% | 1,796,372 | $212,007,823 | $213,911,978 | +$1,904,155 | +0.90% | |
| Rtw Investments, Lp | 1.96% | 1,668,500 | $196,916,370 | $198,684,980 | +$1,768,610 | +0.90% | |
| Millennium Management Llc | 0.14% | 1,608,014 | $189,777,812 | $191,482,307 | +$1,704,495 | +0.90% | |
| Artisan Partners Limited Partnership | 0.28% | 1,450,907 | $171,236,007 | $172,774,006 | +$1,537,999 | +0.90% | |
| Vanguard Capital Management Llc | 0.00% | 1,445,710 | $170,622,694 | $172,155,147 | +$1,532,453 | +0.90% | |
| Fmr Llc | 0.01% | 1,361,919 | $160,733,672 | $162,177,315 | +$1,443,643 | +0.90% | |
| Holocene Advisors, Lp | 0.36% | 1,248,658 | $147,366,617 | $148,690,195 | +$1,323,578 | +0.90% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.03% | 1,047,452 | $123,620,286 | $124,730,584 | +$1,110,298 | +0.90% | |
| Geode Capital Management, Llc | 0.01% | 817,110 | $96,452,668 | $97,301,459 | +$848,791 | +0.88% | |
| State Street Corp | 0.00% | 788,302 | $93,035,402 | $93,871,002 | +$835,600 | +0.90% | |
| Bnp Paribas Asset Management Holding S.A. | 0.10% | 762,062 | $89,938,558 | $90,746,343 | +$807,785 | +0.90% | |
| Eventide Asset Management, Llc | 1.48% | 760,825 | $89,770,578 | $90,599,041 | +$828,463 | +0.92% | |
| Stephens Investment Management Group Llc | 0.88% | 693,437 | $82,484,331 | $82,574,478 | +$90,147 | +0.11% | |
| Fuller & Thaler Asset Management, Inc. | 0.27% | 674,698 | $79,627,894 | $80,343,038 | +$715,144 | +0.90% | |
| Blair William & Co/Il | 0.21% | 628,385 | $74,161,984 | $74,828,086 | +$666,102 | +0.90% | |
| Braidwell Lp | 2.40% | 610,192 | $72,014,860 | $72,661,663 | +$646,803 | +0.90% | |
| Point72 Asset Management, L.P. | 0.12% | 599,405 | $70,741,778 | $71,377,147 | +$635,369 | +0.90% | |
| Arrowstreet Capital, Limited Partnership | 0.04% | 582,879 | $68,791,380 | $69,409,231 | +$617,851 | +0.90% | |
| D. E. Shaw & Co., Inc. | 0.05% | 554,266 | $65,414,473 | $66,001,995 | +$587,522 | +0.90% | |
| Capital Research Global Investors | 0.01% | 509,590 | $60,141,812 | $60,681,977 | +$540,165 | +0.90% | |
| Allspring Global Investments Holdings, Llc | 0.09% | 467,113 | $55,222,099 | $55,623,816 | +$401,717 | +0.73% | |
| Bank Of America Corp | 0.00% | 432,539 | $51,048,251 | $51,506,744 | +$458,493 | +0.90% | |
| Polar Capital Holdings Plc | 0.22% | 421,612 | $49,758,648 | $50,205,557 | +$446,909 | +0.90% | |
| Manufacturers Life Insurance Company, The | 0.04% | 390,577 | $46,095,898 | $46,509,909 | +$414,011 | +0.90% | |
| Mackenzie Financial Corp | 0.05% | 371,475 | $43,841,480 | $44,235,243 | +$393,763 | +0.90% | |
| Loomis Sayles & Co L P | 0.06% | 367,894 | $43,418,850 | $43,808,818 | +$389,968 | +0.90% | |
| Goldman Sachs Group Inc | 0.01% | 348,563 | $41,137,405 | $41,506,882 | +$369,477 | +0.90% | |
| Ophir Asset Management Pty Ltd | 4.62% | 335,807 | $39,631,942 | $39,987,898 | +$355,956 | +0.90% | |
| Invesco Ltd. | 0.01% | 297,452 | $35,105,285 | $35,420,584 | +$315,299 | +0.90% | |
| Northern Trust Corp | 0.00% | 285,086 | $33,645,849 | $33,948,041 | +$302,192 | +0.90% | |
| Charles Schwab Investment Management Inc | 0.01% | 281,897 | $33,269,484 | $33,568,295 | +$298,811 | +0.90% | |
| Fred Alger Management, Llc | 0.15% | 280,040 | $33,050,321 | $33,347,163 | +$296,842 | +0.90% | |
| Rock Springs Capital Management Lp | 1.82% | 261,750 | $30,891,735 | $31,169,190 | +$277,455 | +0.90% | |
| Schroder Investment Management Group | 0.02% | 247,746 | $28,295,071 | $29,501,594 | +$1,206,523 | +4.26% | |
| Morgan Stanley | 0.00% | 237,799 | $28,065,076 | $28,317,105 | +$252,029 | +0.90% | |
| Ameriprise Financial Inc | 0.01% | 236,786 | $27,945,484 | $28,196,477 | +$250,993 | +0.90% | |
| Citigroup Inc | 0.02% | 232,123 | $27,395,157 | $27,641,207 | +$246,050 | +0.90% | |
| Qube Research & Technologies Ltd | 0.04% | 226,884 | $26,776,850 | $27,017,347 | +$240,497 | +0.90% | |
| Vanguard Fiduciary Trust Co | 0.01% | 223,699 | $26,400,956 | $26,638,077 | +$237,121 | +0.90% | |
| Deutsche Bank Ag\ | 0.01% | 215,758 | $25,463,758 | $25,692,463 | +$228,705 | +0.90% | |
| Sei Investments Co | 0.02% | 198,904 | $23,474,652 | $23,685,488 | +$210,836 | +0.90% | |
| Balyasny Asset Management L.P. | 0.05% | 194,429 | $22,946,511 | $23,152,605 | +$206,094 | +0.90% | |
| Barclays Plc | 0.01% | 188,345 | $22,228,477 | $22,428,123 | +$199,646 | +0.90% | |
| Bamco Inc | 0.07% | 183,900 | $21,703,878 | $21,898,812 | +$194,934 | +0.90% | |
| Next Century Growth Investors Llc | 1.45% | 169,306 | $19,981,494 | $20,160,958 | +$179,464 | +0.90% | |
| First Light Asset Management, Llc | 1.78% | 168,116 | $19,841,050 | $20,019,253 | +$178,203 | +0.90% | |
| Massachusetts Financial Services Co | 0.01% | 166,637 | $19,666,499 | $19,843,134 | +$176,635 | +0.90% | |
| Oberweis Asset Management Inc/ | 0.54% | 156,004 | $18,411,592 | $18,576,956 | +$165,364 | +0.90% | |
| Federated Hermes, Inc. | 0.03% | 149,459 | $17,639,152 | $17,797,578 | +$158,426 | +0.90% |
Frequently asked questions about IRTC
Who owns the most IRTC stock?
The largest holders of IRTC are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for IRHYTHM TECHNOLOGIES INC (IRTC).
Is IRTC widely held by superinvestors?
Many widely followed stocks like IRTC appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly IRTC is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.