iRhythm Holdings
IRTC
303 hedge funds and large institutions have $5.44B invested in iRhythm Holdings in 2025 Q2 according to their latest regulatory filings, with 71 funds opening new positions, 100 increasing their positions, 92 reducing their positions, and 22 closing their positions.
223% more first-time investments, than exits
New positions opened: 71 | Existing positions closed: 22
67% more funds holding in top 10
Funds holding in top 10: 3 → 5 (+2)
44% more capital invested
Capital invested by funds: $3.77B → $5.44B (+$1.67B)
18% more funds holding
Funds holding: 256 → 303 (+47)
9% more repeat investments, than reductions
Existing positions increased: 100 | Existing positions reduced: 92
3.7% less ownership
Funds ownership: 114.56% → 110.86% (-3.7%)
28% less call options, than puts
Call options by funds: $27.3M | Put options by funds: $37.6M
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Holocene Advisors
New York
|
+$38.6M |
| 2 |
Man Group
London,
United Kingdom
|
+$34.6M |
| 3 |
Loomis, Sayles & Company
Boston,
Massachusetts
|
+$33M |
| 4 |
D.E. Shaw & Co
New York
|
+$32M |
| 5 |
Wellington Management Group
Boston,
Massachusetts
|
+$29.7M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Capital Research Global Investors
Los Angeles,
California
|
-$89.9M |
| 2 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
-$55.1M |
| 3 |
Westfield Capital Management
Boston,
Massachusetts
|
-$42.2M |
| 4 |
SPC
Slate Path Capital
New York
|
-$38.3M |
| 5 |
UBS AM
Chicago,
Illinois
|
-$38.2M |
IRTC Hedge Fund Activity: Q2 2025 in Review
303 of the 7,613 institutional investors tracked by Wall St. Rank reported a position in iRhythm Holdings (IRTC) for Q2 2025, worth a combined $5.44B — up 44% from $3.77B a quarter earlier.
Buyers outnumbered sellers: 71 funds opened new IRTC positions and 22 closed out — a net gain of 49 holders — while 100 added to existing stakes and 92 trimmed.
The largest buyer was Holocene Advisors, adding an estimated $38.6M. The largest seller was Capital Research Global Investors, cutting an estimated $89.9M.
- 303 institutional investors held iRhythm Holdings (IRTC) as of Q2 2025, up from 256 in Q1 2025.
- Funds reported $5.44B of iRhythm Holdings stock for Q2 2025, up 44% quarter-over-quarter.
- 71 funds opened new iRhythm Holdings positions in Q2 2025 and 22 closed out, a net change of +49 holders.
- The largest iRhythm Holdings buyer in Q2 2025 was Holocene Advisors, an estimated $38.6M added.
- The largest iRhythm Holdings seller in Q2 2025 was Capital Research Global Investors, an estimated $89.9M sold.
Based on aggregated 13F filings for Q2 2025.