Stock Ownership/IRTC

IRHYTHM HOLDINGS INC (IRTC): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in IRTC · Health Care. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
20
13F filers
Aggregate Value
$541.0M
Across holders
Last Price
$125.25
2026-08-24
Sector
Health Care
GICS
Quarterly fund activity9 increased10 reduced2 exited
Full exits: ADAGE CAPITAL PARTNERS GP, L.L.C., TWO SIGMA INVESTMENTS, LP
Institutional Holders of IRTC
↗
20 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
MILLENNIUM MANAGEMENT LLC
CIK 0001273087
Hedge Fund1.41M$167.3M30.9%0.1%Reduced$-24.0MQ2 2026
Holocene Advisors, LP
CIK 0001700574
Hedge Fund784K$93.2M17.2%0.2%Reduced$-55.3MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund630K$74.9M13.8%0.0%Added+$73.7MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund451K$53.6M9.9%0.0%Reduced$-15.7MQ2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund273K$32.5M6.0%0.0%Reduced+$29.9MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund272K$32.3M6.0%0.0%Added+$5.3MQ2 2026
FRED ALGER MANAGEMENT, LLC
CIK 0000003520
Hedge Fund221K$26.3M4.9%0.1%Reduced$-2.7MQ2 2026
Schonfeld Strategic Advisors LLC
CIK 0001665241
Hedge Fund152K$18.1M3.3%0.1%Added+$7.6MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund96K$11.4M2.1%0.0%Reduced+$8.5MQ2 2026
Squarepoint Ops LLC
CIK 0001642575
Hedge Fund72K$8.5M1.6%0.0%Added+$7.8MQ2 2026
MILLENNIUM MANAGEMENT LLCReduced
Hedge Fund
$167.3M· 30.9% of total· 0.1% port· 1.41M sh· $-24.0M QoQ· Q2 2026
Holocene Advisors, LPReduced
Hedge Fund
$93.2M· 17.2% of total· 0.2% port· 784K sh· $-55.3M QoQ· Q2 2026
SHAW D E & CO INCAdded
Hedge Fund
$74.9M· 13.8% of total· 0.0% port· 630K sh· +$73.7M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPReduced
Hedge Fund
$53.6M· 9.9% of total· 0.0% port· 451K sh· $-15.7M QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$32.5M· 6.0% of total· 0.0% port· 273K sh· +$29.9M QoQ· Q2 2026
Qube Research & Technologies LtdAdded
Hedge Fund
$32.3M· 6.0% of total· 0.0% port· 272K sh· +$5.3M QoQ· Q2 2026
FRED ALGER MANAGEMENT, LLCReduced
Hedge Fund
$26.3M· 4.9% of total· 0.1% port· 221K sh· $-2.7M QoQ· Q2 2026
Schonfeld Strategic Advisors LLCAdded
Hedge Fund
$18.1M· 3.3% of total· 0.1% port· 152K sh· +$7.6M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$11.4M· 2.1% of total· 0.0% port· 96K sh· +$8.5M QoQ· Q2 2026
Squarepoint Ops LLCAdded
Hedge Fund
$8.5M· 1.6% of total· 0.0% port· 72K sh· +$7.8M QoQ· Q2 2026
Verition Fund Management LLCAdded
Hedge Fund
$6.7M· 1.2% of total· 0.0% port· 56K sh· +$2.5M QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$5.2M· 1.0% of total· 0.0% port· 43K sh· $-5.3M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCReduced
Hedge Fund
$4.6M· 0.8% of total· 0.0% port· 39K sh· $-1.8M QoQ· Q2 2026
Brevan Howard Capital Management LPAdded
Hedge Fund
$2.8M· 0.5% of total· 0.0% port· 24K sh· +$840K QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCReduced
Hedge Fund
$2.1M· 0.4% of total· 0.0% port· 18K sh· +$2.1M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCReduced
Hedge Fund
$662K· 0.1% of total· 0.0% port· 6K sh· $-22.5M QoQ· Q2 2026
Ancora Advisors, LLCUnchanged
Hedge Fund
$384K· 0.1% of total· 0.0% port· 3K sh· +$0 QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCAdded
Hedge Fund
$304K· 0.1% of total· 0.0% port· 3K sh· +$3K QoQ· Q2 2026
Rockefeller Capital Management L.P.Added
Hedge Fund
$196K· 0.0% of total· 0.0% port· 2K sh· $-72K QoQ· Q2 2026
Walleye Capital LLCAdded
Hedge Fund
$11K· 0.0% of total· 0.0% port· 92 sh· — QoQ· Q2 2026
1–10 of 20
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