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iRhythm Holdings
IRTC

337 hedge funds and large institutions have $5.96B invested in iRhythm Holdings in 2025 Q3 according to their latest regulatory filings, with 63 funds opening new positions, 110 increasing their positions, 114 reducing their positions, and 28 closing their positions.

New
Increased
Maintained
Reduced
Closed

125% more first-time investments, than exits

New positions opened: 63 | Existing positions closed: 28

11% more funds holding

Funds holding: 303 → 337 (+34)

10% more capital invested

Capital invested by funds: $5.44B → $5.96B (+$520M)

4% less repeat investments, than reductions

Existing positions increased: 110 | Existing positions reduced: 114

2.83% less ownership

Funds ownership: 110.86% → 108.02% (-2.8%)

44% less call options, than puts

Call options by funds: $24.5M | Put options by funds: $44.1M

60% less funds holding in top 10

Funds holding in top 10: 5 → 2 (-3)

Holders
337
Holders Change
+34
Holders Change %
+11.22%
% of All Funds
4.42%
Holding in Top 10
2
Holding in Top 10 Change
-3
Holding in Top 10 Change %
-60%
% of All Funds
0.03%
New
63
Increased
110
Reduced
114
Closed
28
Calls
$24.5M
Puts
$44.1M
Net Calls
-$19.6M
Net Calls Change
-$9.27M

Top Buyers

1
Arrowstreet Capital
Arrowstreet Capital
Massachusetts
+$84.7M
2
PCH
Polar Capital Holdings
United Kingdom
+$53.2M
3
T. Rowe Price Associates
T. Rowe Price Associates
Maryland
+$49.8M
4
Invesco
Invesco
Georgia
+$49.1M
5
Fidelity Investments
Fidelity Investments
Massachusetts
+$32.4M

Top Sellers

1
Sands Capital Management
Sands Capital Management
Virginia
-$108M
2
Capital Research Global Investors
Capital Research Global Investors
California
-$51.4M
3
CIP
Champlain Investment Partners
Vermont
-$47M
4
Mackenzie Financial
Mackenzie Financial
Ontario, Canada
-$43.6M
5
Bank of New York Mellon
Bank of New York Mellon
New York
-$39.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
RS
351
R Squared
Hong Kong
– -$404K -2,621 Closed
CC
352
Corton Capital
Ontario, Canada
– -$342K -2,223 Closed
PTC
353
Petrus Trust Company
Texas
– -$276K -1,792 Closed
AIM
354
Aigen Investment Management
New York
– -$260K -1,686 Closed
MNBTD
355
Moody National Bank Trust Division
Texas
– -$247K -1,602 Closed
BPCE
356
Bank Pictet & Cie (Europe)
Germany
– -$237K -1,542 Closed
AI
357
Atria Investments
North Carolina
– -$200K -1,300 Closed
RBI
358
Raiffeisen Bank International
Austria
– -$108K -680 Closed
BIG
359
Brooklyn Investment Group
New York
– -$15.4K -100 Closed
KIM
360
Kestra Investment Management
Texas
– -$3.62K -28 Closed
GWM
361
Geneos Wealth Management
Colorado
– -$3.69K -24 Closed
Toronto Dominion Bank
362
Toronto Dominion Bank
Ontario, Canada
– -$3.08K -20 Closed
SC
363
SouthState Corp
Florida
– -$2.16K -14 Closed
PWA
364
Physician Wealth Advisors
Utah
– -$462 -3 Closed
TPWA
365
Twin Peaks Wealth Advisors
California
– -$325 -2 Closed
11 12 13 14
15

IRTC Hedge Fund Activity: Q3 2025 in Review

337 of the 7,619 institutional investors tracked by Wall St. Rank reported a position in iRhythm Holdings (IRTC) for Q3 2025, worth a combined $5.96B — up 9.6% from $5.44B a quarter earlier.

Buyers outnumbered sellers: 63 funds opened new IRTC positions and 28 closed out — a net gain of 35 holders — while 110 added to existing stakes and 114 trimmed.

The largest buyer was Arrowstreet Capital, adding an estimated $84.7M. The largest seller was Sands Capital Management, cutting an estimated $108M.

  • 337 institutional investors held iRhythm Holdings (IRTC) as of Q3 2025, up from 303 in Q2 2025.
  • Funds reported $5.96B of iRhythm Holdings stock for Q3 2025, up 9.6% quarter-over-quarter.
  • 63 funds opened new iRhythm Holdings positions in Q3 2025 and 28 closed out, a net change of +35 holders.
  • The largest iRhythm Holdings buyer in Q3 2025 was Arrowstreet Capital, an estimated $84.7M added.
  • The largest iRhythm Holdings seller in Q3 2025 was Sands Capital Management, an estimated $108M sold.

Based on aggregated 13F filings for Q3 2025.