iRhythm Holdings
IRTC
256 hedge funds and large institutions have $3.77B invested in iRhythm Holdings in 2025 Q1 according to their latest regulatory filings, with 53 funds opening new positions, 80 increasing their positions, 84 reducing their positions, and 22 closing their positions.
141% more first-time investments, than exits
New positions opened: 53 | Existing positions closed: 22
50% more funds holding in top 10
Funds holding in top 10: 2 → 3 (+1)
22% more capital invested
Capital invested by funds: $3.09B → $3.77B (+$673M)
13% more funds holding
Funds holding: 227 → 256 (+29)
4.88% more ownership
Funds ownership: 109.68% → 114.56% (+4.9%)
5% less repeat investments, than reductions
Existing positions increased: 80 | Existing positions reduced: 84
40% less call options, than puts
Call options by funds: $14.4M | Put options by funds: $24M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
UBS AM
Chicago,
Illinois
|
+$60.2M |
| 2 |
Capital Research Global Investors
Los Angeles,
California
|
+$59.9M |
| 3 |
Fuller & Thaler Asset Management
San Mateo,
California
|
+$54.9M |
| 4 |
Point72 Asset Management
Stamford,
Connecticut
|
+$44.5M |
| 5 |
Millennium Management
New York
|
+$36M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Citadel Advisors
Miami,
Florida
|
-$31.8M |
| 2 |
Alyeska Investment Group
Chicago,
Illinois
|
-$31.7M |
| 3 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
-$23.9M |
| 4 |
Sands Capital Management
Arlington,
Virginia
|
-$17M |
| 5 |
B
Braidwell
Stamford,
Connecticut
|
-$15.8M |
IRTC Hedge Fund Activity: Q1 2025 in Review
256 of the 7,457 institutional investors tracked by Wall St. Rank reported a position in iRhythm Holdings (IRTC) for Q1 2025, worth a combined $3.77B — up 22% from $3.09B a quarter earlier.
Buyers outnumbered sellers: 53 funds opened new IRTC positions and 22 closed out — a net gain of 31 holders — while 80 added to existing stakes and 84 trimmed.
The largest buyer was UBS AM, adding an estimated $60.2M. The largest seller was Citadel Advisors, cutting an estimated $31.8M.
- 256 institutional investors held iRhythm Holdings (IRTC) as of Q1 2025, up from 227 in Q4 2024.
- Funds reported $3.77B of iRhythm Holdings stock for Q1 2025, up 22% quarter-over-quarter.
- 53 funds opened new iRhythm Holdings positions in Q1 2025 and 22 closed out, a net change of +31 holders.
- The largest iRhythm Holdings buyer in Q1 2025 was UBS AM, an estimated $60.2M added.
- The largest iRhythm Holdings seller in Q1 2025 was Citadel Advisors, an estimated $31.8M sold.
Based on aggregated 13F filings for Q1 2025.