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iRhythm Holdings, Inc. hedge fund holdings

IRTCNASDAQ
$110.37-0.68 (-0.61%)as of Oct 2, 2026

Every quarter, large institutional investment managers with over $100M in U.S.-listed assets under management disclose their U.S. equity holdings through 13F filings. Read together, those filings show which businesses professional capital is moving into and out of.

Price vs funds buying and selling

IRTC · close · 13FReported Aug 14, 2026

Price vs funds buying and selling data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (-36.5%). 0 fund reports plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
DateCategoryPersonRoleActionAmountChange in holding
Funds buying · new + increased
Funds selling · reduced + closed
Net buyers vs sellers
Buying = new + increased; selling = reduced + closed. Counts exclude position changes under 5% of the fund's holding last quarter.

Price and fund activity data

Quarterly 13F fund buying and selling activity
QuarterFunds buyingFunds sellingBoughtSoldFilersReported
Q2 202512491$598M$663M277Aug 14, 2025
Q3 202512499$636M$668M313Nov 14, 2025
Q4 2025103114$817M$722M315Feb 14, 2026
Q1 2026117129$775M$820M286May 15, 2026
Q2 202612894$500M$471M282Aug 14, 2026

Quarterly action breakdown

Q2 2026
282 filers
New position
33
$89.4M+751K sh
Increased
95
$410M+3.45M sh
Reduced
65
-$382M-3.21M sh
Out / sold
29
-$88.5M-744K sh
Last 4 quarters · free
Reported Aug 14, 2026
FundActionChange in dollarValue% of portfolioReported
RTW Investments, LPAdded 30.81%+$61.2M$260M2.22%Aug 14, 2026
Holocene Advisors, LPReduce 37.24%-$55.3M$93.2M0.21%Aug 14, 2026
Westfield Capital Management Co LPNew Buy+$34.4M$34.4M0.11%Aug 12, 2026
Artisan Partners Limited PartnershipAdded 14.43%+$24.9M$197M0.31%Aug 13, 2026
Schroder Investment Management GroupAdded 80.93%+$23.7M$53.1M0.04%Aug 13, 2026
Prosight Management, LPAdded 1555.00%+$18.5M$19.7M3.39%Aug 14, 2026
Ophir Asset Management Pty LtdReduce 40.00%-$16M$24M1.97%Aug 14, 2026
Stephens Investment Management Group LLCAdded 23.49%+$15.7M$82.5M0.88%Jul 29, 2026
Eventide Asset Management, LLCAdded 15.71%+$14.2M$105M1.40%Aug 14, 2026
Perceptive Advisors LLCAdded 113.06%+$14.1M$26.6M0.40%Aug 14, 2026
USS Investment Management LtdNew Buy+$12.7M$12.7M0.05%Aug 11, 2026
BNP PARIBAS ASSET MANAGEMENT Holding S.A.Added 13.71%+$12.4M$103M0.10%Aug 13, 2026
Blair William & CoReduce 16.50%-$12.3M$62.4M0.16%Aug 11, 2026
Champlain Investment Partners, LLCNew Buy+$11.5M$11.5M0.30%Aug 12, 2026
Integral Health Asset Management, LLCNew Buy+$10.7M$10.7M0.42%Aug 14, 2026
Thrivent Financial for LutheransSell 100%-$8.87M$00.00%Aug 14, 2026
Jennison Associates LLCReduce 50.43%-$8.22M$8.08M0.00%Aug 3, 2026
PFM Health Sciences, LPNew Buy+$7.76M$7.76M0.67%Aug 14, 2026
Frontier Capital Management Co LLCAdded 93.52%+$7.62M$15.8M0.15%Aug 14, 2026
Fred Alger Management, LLCReduce 21.16%-$7.05M$26.3M0.09%Aug 14, 2026
Oberweis Asset Management Inc/Added 29.49%+$5.47M$24M0.50%Aug 14, 2026
Braidwell LPAdded 7.22%+$5.24M$77.8M2.88%Aug 14, 2026
Polar Capital Holdings PlcAdded 8.65%+$4.34M$54.5M0.13%Aug 14, 2026
First Trust Advisors LPReduce 73.24%-$4.15M$1.51M0.00%Aug 11, 2026
Atle Fund Management ABAdded 142.37%+$3.78M$6.44M1.73%Jul 24, 2026
KCM Capital IncSell 100%-$3.54M$00.00%Aug 12, 2026
Hussman Strategic Advisors, Inc.Sell 100%-$3.47M$00.00%Aug 3, 2026
Ensign Peak Advisors, IncReduce 91.84%-$3.27M$291K0.00%Aug 14, 2026
Parkman Healthcare Partners LLCAdded 67.64%+$3.23M$8M0.82%Aug 14, 2026
Castleark Management LLCSell 100%-$3.21M$00.00%Aug 14, 2026
Susquehanna Portfolio Strategies, LLCReduce 35.34%-$3.19M$5.84M0.09%Aug 14, 2026
Silvercrest Asset Management Group LLCAdded 39.15%+$2.87M$10.2M0.07%Aug 14, 2026
Loomis Sayles & Co L PReduce 5.42%-$2.37M$41.4M0.05%Aug 14, 2026
Campbell & CO Investment Adviser LLCReduce 46.04%-$2.24M$2.62M0.14%Aug 3, 2026
Next Century Growth Investors LLCAdded 10.49%+$2.11M$22.3M1.18%Aug 14, 2026
Congress Asset Management CoSell 100%-$1.94M$00.00%Jul 7, 2026
Oppenheimer & Co IncNew Buy+$1.89M$1.89M0.02%Aug 3, 2026
Jain Global LLCNew Buy+$1.58M$1.58M0.01%Aug 14, 2026
Quantinno Capital Management LPReduce 71.24%-$1.58M$637K0.00%Aug 13, 2026
Homestead Advisers CorpSell 100%-$1.57M$00.00%Aug 13, 2026
Capital Fund Management S.A.New Buy+$1.26M$1.26M0.01%Aug 13, 2026
FORA Capital, LLCNew Buy+$1.23M$1.23M0.08%Aug 13, 2026
Canada Pension Plan Investment BoardReduce 17.18%-$1.2M$5.79M0.00%Aug 14, 2026
Peregrine Capital Management LLCAdded 14.95%+$1.17M$9.01M0.29%Jul 17, 2026
Adage Capital Partners GP, L.L.C.Sell 100%-$978K$00.00%Aug 14, 2026
Rock Springs Capital Management LPAdded 3.02%+$940K$32.1M1.57%Aug 14, 2026
Segall Bryant & Hamill, LLCAdded 7.69%+$912K$12.8M0.15%Aug 12, 2026
OssiamNew Buy+$630K$630K0.01%Aug 13, 2026
Hennion & Walsh Asset Management, Inc.Reduce 55.45%-$521K$419K0.01%Jul 8, 2026
Harbour Capital Advisors, LLCNew Buy+$419K$419K0.08%Jul 15, 2026
Nomura Asset Management International Inc.Added 16.40%+$414K$2.94M0.00%Aug 14, 2026
Inceptionr LLCReduce 64.21%-$414K$231K0.06%Aug 11, 2026
Diversified Trust CoNew Buy+$400K$400K0.01%Jul 17, 2026
MRA Advisory GroupSell 100%-$379K$00.00%Jul 8, 2026
Bridgefront Capital, LLCAdded 63.68%+$371K$953K0.25%Aug 14, 2026
Blueshift Asset Management, LLCSell 100%-$361K$00.00%Aug 14, 2026
State of New Jersey Common Pension Fund DReduce 21.44%-$361K$1.32M0.00%Aug 4, 2026
ADAR1 Capital Management, LLCNew Buy+$357K$357K0.02%Aug 14, 2026
Banque Pictet & Cie SAReduce 11.98%-$354K$2.6M0.02%Jul 24, 2026
Fox Run Management, L.L.C.Added 45.67%+$313K$999K0.17%Aug 4, 2026
Vise Technologies, Inc.Sell 100%-$306K$00.00%Aug 11, 2026
Praxis Investment Management IncSell 100%-$306K$00.00%Aug 4, 2026
Bamco IncReduce 1.34%-$294K$21.6M0.03%Aug 14, 2026
Wellington Management Group LLPReduce 2.44%-$262K$10.5M0.00%Aug 14, 2026
Virtus Advisers, LLCSell 100%-$260K$00.00%Aug 11, 2026
Axq Capital, LPSell 100%-$256K$00.00%Aug 6, 2026
Persistent Asset Partners LtdNew Buy+$253K$253K0.08%Aug 7, 2026
Vontobel Holding Ltd.New Buy+$252K$252K0.00%Aug 3, 2026
Bessemer Group IncReduce 85.73%-$252K$42K0.00%Aug 12, 2026
Bayforest Capital LtdReduce 73.77%-$251K$89.2K0.08%Aug 5, 2026
Frank, Rimerman Advisors LLCSell 100%-$241K$00.00%Jul 27, 2026
Keybank National AssociationSell 100%-$218K$00.00%Jul 28, 2026
SeaCrest Wealth Management, LLCSell 100%-$216K$00.00%Jul 9, 2026
Mitsubishi UFJ Asset Management Co., Ltd.Added 64.55%+$215K$548K0.00%Aug 7, 2026
Handelsbanken Fonder ABAdded 17.24%+$214K$1.46M0.00%Jul 10, 2026
Trillium Asset Management, LLCAdded 10.28%+$204K$2.19M0.07%Aug 11, 2026
VANGUARD ASSET MANAGEMENT, LtdAdded 5.85%+$199K$3.61M0.00%Aug 13, 2026
Harbor Capital Advisors, Inc.Added 9.60%+$179K$2.04M0.14%Aug 7, 2026
WoodTrust Financial CorpAdded 14.26%+$178K$1.43M0.17%Jul 27, 2026
Exchange Traded Concepts, LLCAdded 20.96%+$171K$989K0.00%Aug 11, 2026
Van Eck Associates CorpSell 100%-$166K$00.00%Aug 14, 2026
Abn Amro Investment SolutionsAdded 13.42%+$162K$1.37M0.01%Jul 23, 2026
Freestone Grove Partners LPNew Buy+$161K$161K0.00%Aug 14, 2026
Corient IA LPNew Buy+$159K$159K0.15%Aug 12, 2026
WCM Investment Management, LLCReduce 1.00%-$128K$12.7M0.02%Aug 13, 2026
First Light Asset Management, LLCReduce 0.61%-$122K$19.9M1.21%Aug 14, 2026
Kampmann Melissa S.Reduce 4.53%-$119K$2.5M1.89%Jul 29, 2026
Tokio Marine Asset Management Co LtdNew Buy+$106K$106K0.00%Jul 30, 2026
Massachusetts Financial Services CoReduce 0.38%-$76K$19.7M0.01%Aug 3, 2026
EFG International AGReduce 1.86%-$65.1K$3.44M0.06%Aug 14, 2026
Ascent Group, LLCReduce 5.75%-$63.6K$1.04M0.03%Aug 3, 2026
Cinctive Capital Management LPReduce 6.16%-$58.3K$888K0.03%Aug 14, 2026
Kemnay Advisory Services Inc.Added 60.85%+$54.7K$145K0.02%Aug 14, 2026
Vanguard Investments Australia, Ltd.Added 5.26%+$50K$1M0.00%Aug 13, 2026
Harbor Investment Advisory, LLCNew Buy+$50K$50K0.00%Jul 7, 2026
Spire Wealth ManagementNew Buy+$49.8K$49.8K0.00%Jul 15, 2026
Assetmark, IncAdded 40.19%+$39.3K$137K0.00%Jul 30, 2026
Sirios Capital Management L PReduce 0.83%-$34.4K$4.1M0.50%Aug 14, 2026
Vident Advisory, LLCReduce 7.78%-$32.7K$388K0.00%Aug 12, 2026
Xponance LLCAdded 9.13%+$32.6K$390K0.00%Aug 10, 2026

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