iRhythm Holdings
IRTC
304 hedge funds and large institutions have $4.24B invested in iRhythm Holdings in 2026 Q2 according to their latest regulatory filings, with 44 funds opening new positions, 121 increasing their positions, 91 reducing their positions, and 41 closing their positions.
33% more repeat investments, than reductions
Existing positions increased: 121 | Existing positions reduced: 91
7% more first-time investments, than exits
New positions opened: 44 | Existing positions closed: 41
2% more capital inflows, than outflows
Capital inflows: $519M | Capital outflows: $507M
0% more funds holding in top 10
Funds holding in top 10: 1 → 1 (0)
0% less funds holding
Funds holding: 305 → 304 (-1)
7% less call options, than puts
Call options by funds: $7.34M | Put options by funds: $7.9M
1.52% less ownership
Funds ownership: 109.94% → 108.42% (-1.5%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
RI
RTW Investments
New York
|
+$59.8M |
| 2 |
Westfield Capital Management
Boston,
Massachusetts
|
+$33.6M |
| 3 |
BlackRock
New York
|
+$28.4M |
| 4 |
Artisan Partners
Milwaukee,
Wisconsin
|
+$24.3M |
| 5 |
Schroder Investment Management Group
London,
United Kingdom
|
+$23.3M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Holocene Advisors
New York
|
-$54.1M |
| 2 |
Mackenzie Financial
Toronto Ontario,
Ontario, Canada
|
-$43.8M |
| 3 |
Point72 Asset Management
Stamford,
Connecticut
|
-$37.9M |
| 4 |
Invesco
Atlanta,
Georgia
|
-$32M |
| 5 |
Assenagon Asset Management
Senningerberg,
Luxembourg
|
-$28.8M |
IRTC Hedge Fund Activity: Q2 2026 in Review
304 of the 8,352 institutional investors tracked by Wall St. Rank reported a position in iRhythm Holdings (IRTC) for Q2 2026, worth a combined $4.24B — up 1.1% from $4.19B a quarter earlier.
Buyers outnumbered sellers: 44 funds opened new IRTC positions and 41 closed out — a net gain of 3 holders — while 121 added to existing stakes and 91 trimmed.
The largest buyer was RTW Investments, adding an estimated $59.8M. The largest seller was Holocene Advisors, cutting an estimated $54.1M.
- 304 institutional investors held iRhythm Holdings (IRTC) as of Q2 2026, down from 305 in Q1 2026.
- Funds reported $4.24B of iRhythm Holdings stock for Q2 2026, up 1.1% quarter-over-quarter.
- 44 funds opened new iRhythm Holdings positions in Q2 2026 and 41 closed out, a net change of +3 holders.
- The largest iRhythm Holdings buyer in Q2 2026 was RTW Investments, an estimated $59.8M added.
- The largest iRhythm Holdings seller in Q2 2026 was Holocene Advisors, an estimated $54.1M sold.
Based on aggregated 13F filings for Q2 2026.