iRhythm Holdings, Inc.
IRTC • NASDAQ
iRhythm Holdings, Inc. is a medical - devices company in the healthcare sector on NASDAQ, led by Quentin S. Blackford, with a market cap of $5.5B. As of Q3 2025, 108% of shares are held by 328 institutional investors, with VANGUARD GROUP INC as the largest holder at 10.09%.
CEOQuentin S. Blackford
Market Cap$5.5B
Medical - Devices
Healthcare
Employees2.0K
Websiteirhythmtech.com
Country
United States of America
Overview
Overview of institutional ownership in IRTC as of Q3 2025 with a market cap of $5.5B
All Institutions
- Institutions
- 328
- Value Held
- $6.0B
- Shares Held
- 34.8M
- Avg Position
- $18.3M
- Median Position
- $1.1M
Hedge Funds
- Hedge Funds
- 51
- Value Held
- $674.4M
- Shares Held
- 3.9M
- Avg Position
- $13.2M
- Median Position
- $3.3M
Ownership Breakdown
Based on market cap of $5.5B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.
Biggest Investors
Institutions with the largest positions in IRTC as of Q3 2025
| Institution | Position Value |
|---|---|
 VANGUARD GROUP INC Institution | $557.3M 0.01% of portfolio |
 BlackRock, Inc. Institution | $494.6M 0.01% of portfolio |
 Artisan Partners Limited Partnership Long Only Manager | $441.6M 0.63% of portfolio |
 SANDS CAPITAL MANAGEMENT, LLC Long Only Manager | $384.6M 1.06% of portfolio |
 Capital Research Global Investors RIA/Wealth | $203.6M 0.04% of portfolio |
 STATE STREET CORP Institution | $145.8M 0.01% of portfolio |
 GEODE CAPITAL MANAGEMENT LLC ETF Provider | $135.9M 0.01% of portfolio |
B BLAIR WILLIAM & CO/IL Institution | $127.4M 0.34% of portfolio |
E EVENTIDE ASSET MANAGEMENT, LLC Long Only Manager | $118.9M 1.96% of portfolio |
 FMR LLC Institution | $107.3M 0.01% of portfolio |
Net Capital Flow
Institutional buying and selling activity for IRTC in Q3 2025
- Traded
- −$59.1M
- Buyers
- 173
- Sellers
- 138
- Total Bought
- +$658.1M
- Total Sold
- −$717.1M
- Avg Position
- $16.8M
Biggest Buyers
| Institution | Net Bought |
|---|---|
 ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant | +$91.6M +532.7K shares |
 Polar Capital Holdings Plc Long Only Manager | +$57.5M +334.6K shares |
 PRICE T ROWE ASSOCIATES INC /MD/ Long Only Manager | +$53.9M +313.4K shares |
 Invesco Ltd. ETF Provider | +$53.1M +308.8K shares |
FMR LLC Institution | +$35.1M +203.9K shares |
 Holocene Advisors, LP Hedge Fund•Long/Short | +$27.6M +160.2K shares |
 TUDOR INVESTMENT CORP ET AL Hedge Fund•Multi-Strategy | +$27.5M +159.6K shares |
 Jain Global LLC Hedge Fund•Multi-Strategy | +$22.5M +131.1K shares |
BlackRock, Inc. Institution | +$21.6M +125.8K shares |
 PERCEPTIVE ADVISORS LLC Hedge Fund•Long/Short | +$21.2M +123.0K shares |
Biggest Sellers
| Institution | Net Sold |
|---|---|
SANDS CAPITAL MANAGEMENT, LLC Long Only Manager | −$116.9M −679.4K shares |
Capital Research Global Investors RIA/Wealth | −$55.6M −323.1K shares |
C Champlain Investment Partners, LLC Long Only Manager | −$50.8M −295.6K shares |
 MACKENZIE FINANCIAL CORP Long Only Manager | −$47.2M −274.6K shares |
 Bank of New York Mellon Corp Institution | −$43.0M −250.2K shares |
Artisan Partners Limited Partnership Long Only Manager | −$29.8M −173.3K shares |
B BNP Paribas Investment Partners S.A. Institution | −$28.3M −164.4K shares |
 JENNISON ASSOCIATES LLC Long Only Manager | −$24.1M −140.2K shares |
F Freestone Grove Partners LP Hedge Fund•Multi-Strategy | −$23.8M −154.3K shares |
B BESSEMER GROUP INC Institution | −$23.2M −135.0K shares |
Entry and Exit Activity
Institutions that initiated new positions or completely exited IRTC in Q3 2025
- New Positions
- 27
- New Value
- $45.0M
- Exited Positions
- 29
- Exited Value
- $60.1M
New Positions
| Institution | Position Value |
|---|---|
Jain Global LLC Hedge Fund•Multi-Strategy | $22.5M 131.1K shares |
S STEADFAST CAPITAL MANAGEMENT LP Hedge Fund•Long/Short | $6.8M 39.7K shares |
G GCIC Ltd. Institution | $4.9M 28.2K shares |
O OSSIAM Institution | $4.7M 27.1K shares |
 Williamson Legacy Group, LLC RIA/Wealth | $1.3M 7.7K shares |
 Rhenman & Partners Asset Management AB RIA/Wealth | $1.2M 7.0K shares |
 Legato Capital Management LLC Fund of Funds | $539.2K 3.1K shares |
 Counterpoint Mutual Funds LLC ETF Provider | $498.8K 2.9K shares |
 Voleon Capital Management LP Hedge Fund•Quant | $377.0K 2.2K shares |
S State of Alaska, Department of Revenue Institution | $344.3K 2.0K shares |
Exited Positions
| Institution | Previous Position |
|---|---|
F Freestone Grove Partners LP Hedge Fund•Multi-Strategy | $23.8M 154.3K shares |
 SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $10.0M 64.7K shares |
 BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy | $6.9M 44.7K shares |
N NATIXIS Institution | $3.6M 23.5K shares |
X XTX Topco Ltd Institution | $2.5M 16.5K shares |
 KENNEDY CAPITAL MANAGEMENT, INC. Long Only Manager | $2.4M 15.8K shares |
W Winton Capital Group Ltd Institution | $2.0M 12.9K shares |
 Semanteon Capital Management, LP Hedge Fund•Long/Short | $1.5M 10.0K shares |
 Centiva Capital, LP Hedge Fund•Multi-Strategy | $1.5M 9.6K shares |
 UBS OCONNOR LLC Long Only Manager | $1.2M 8.0K shares |
Options Activity
Institutions with the largest Call and Put options positions in IRTC as of Q3 2025
- Call Positions
- 11
- Call Value
- $23.4M
- Put Positions
- 9
- Put Value
- $34.6M
Call Positions
| Institution | Position Value |
|---|---|
J JANE STREET GROUP, LLC Institution | $11.1M 644.0 contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $7.4M 433.0 contracts |
 CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $4.5M 261.0 contracts |
 Walleye Trading LLC RIA/Wealth | $240.8K 14.0 contracts |
R Raiffeisen Bank International AG Institution | $117.0K 6.8 contracts |
 Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy | $68.8K 4.0 contracts |
 Steel Peak Wealth Management LLC RIA/Wealth | - - contracts |
W WOLVERINE TRADING, LLC Institution | - - contracts |
C Cubist Systematic Strategies, LLC Institution | - - contracts |
 Point72 Asset Management, L.P. Hedge Fund•Multi-Strategy | - - contracts |
Put Positions
| Institution | Position Value |
|---|---|
J JANE STREET GROUP, LLC Institution | $16.6M 964.0 contracts |
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity | $12.7M 737.0 contracts |
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy | $4.0M 230.0 contracts |
S Squarepoint Ops LLC Hedge Fund•Quant | $1.3M 74.0 contracts |
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy | $51.6K 3.0 contracts |
 WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy | $51.6K 3.0 contracts |
Walleye Trading LLC RIA/Wealth | $17.2K 1.0 contracts |
W WOLVERINE TRADING, LLC Institution | - - contracts |
N NOMURA HOLDINGS INC Institution | - - contracts |
Most Committed Institutions
Institutions with IRTC as the highest % of their portfolio as of Q3 2025
| Institution | Portfolio Weight |
|---|---|
K Kampmann Melissa S. Institution | 3.00% $4.1M |
 First Light Asset Management, LLC Hedge Fund•Sector | 2.51% $26.7M |
 NEXT CENTURY GROWTH INVESTORS LLC Long Only Manager | 2.41% $32.5M |
 Rock Springs Capital Management LP Hedge Fund•Sector | 2.37% $40.4M |
O Ophir Asset Management Pty Ltd Long Only Manager | 2.16% $17.5M |
H HealthInvest Partners AB Institution | 2.05% $547.6K |
E EVENTIDE ASSET MANAGEMENT, LLC Long Only Manager | 1.96% $118.9M |
B BRAIDWELL LP Hedge Fund•Multi-Strategy | 1.57% $38.8M |
 Stephens Investment Management Group LLC Long Only Manager | 1.15% $89.4M |
SANDS CAPITAL MANAGEMENT, LLC Long Only Manager | 1.06% $384.6M |
Hedge Fund Spotlight
Discover hedge funds investing in IRTC
Verition Fund Management LLC
Hedge Fund • Multi-Strategy
Portfolio ManagerNicholas Matthew Maounis
- Portfolio Value
- $16.7B
- Positions
- 2,759
- Last Reported
- Q3 2025
Sector Allocation
Position in iRhythm Holdings, Inc.
- Market Value
- $4.0M
- Shares Held
- 23.5K
- Portfolio Weight
- 0.02%
- Owned Since
- 2024-Q3
| Top Holding | Sector | Market Value | Weight |
|---|---|---|---|
ETF ETF | $1.0B | 6.02% | |
Semiconductors Technology | $544.1M | 3.25% | |
ETF ETF | $281.5M | 1.68% |
