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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.

New
Increased
Maintained
Reduced
Closed

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

Holders
256
Holders Change
+29
Holders Change %
+12.78%
% of All Funds
3.43%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.04%
New
53
Increased
80
Reduced
84
Closed
22
Calls
$14.4M
Puts
$24M
Net Calls
-$9.56M
Net Calls Change
+$4.76M

Top Buyers

1
UBS AM
UBS AM
Illinois
+$60.2M
2
Capital Research Global Investors
Capital Research Global Investors
California
+$59.9M
3
Fuller & Thaler Asset Management
Fuller & Thaler Asset Management
California
+$54.9M
4
Point72 Asset Management
Point72 Asset Management
Connecticut
+$44.5M
5
Millennium Management
Millennium Management
New York
+$36M

Top Sellers

1
Citadel Advisors
Citadel Advisors
Florida
-$31.8M
2
Alyeska Investment Group
Alyeska Investment Group
Illinois
-$31.7M
3
Mackenzie Financial
Mackenzie Financial
Ontario, Canada
-$23.9M
4
Sands Capital Management
Sands Capital Management
Virginia
-$17M
5
B
Braidwell
Connecticut
-$15.8M
Name Holding Trade Value Shares
Change 		Change in
Stake
Prudential Financial
176
Prudential Financial
New Jersey
$238K +$241K +2,275 New
BPCE
177
Bank Pictet & Cie (Europe)
Germany
$229K -$117K -1,101 -33%
SI
178
Stephens Inc
Arkansas
$222K +$225K +2,122 New
VPIM
179
Vanguard Personalized Indexing Management
California
$222K +$224K +2,117 New
FRA
180
Frank Rimerman Advisors
California
$214K +$217K +2,045 New
RA
181
RiverPark Advisors
New York
$214K +$216K +2,040 New
SWM
182
SeaCrest Wealth Management
New York
$213K +$215K +2,030 New
QCG
183
Quadrant Capital Group
Ohio
$203K +$198K +1,865 +2,487%
Osaic Holdings
184
Osaic Holdings
Arizona
$160K -$16.8K -159 -9%
SO
185
STRS Ohio
Ohio
$147K +$127K +1,200 +600%
KBC Group
186
KBC Group
Belgium
$140K +$1.91K +18 +1%
AF
187
Avanza Fonder
Sweden
$123K +$120K +1,137 New
AB
188
Amalgamated Bank
New York
$114K +$424 +4 +0.4%
Nisa Investment Advisors
189
Nisa Investment Advisors
Missouri
$109K +$741 +7 +0.7%
RMP
190
Richards, Merrill & Peterson
Washington
$107K – – –
US Bancorp
191
US Bancorp
Minnesota
$102K +$39.6K +374 +62%
TRCT
192
Tower Research Capital (TRC)
New York
$101K -$278K -2,627 -73%
RBI
193
Raiffeisen Bank International
Austria
$71.2K – – –
WSFS
194
Wilmington Savings Fund Society
Delaware
$62.8K -$42.4K -400 -40%
VanEck Associates
195
VanEck Associates
New York
$58K – – –
Carson Wealth (CWM LLC)
196
Carson Wealth (CWM LLC)
Nebraska
$54K +$19.3K +182 +54%
BAMF
197
BI Asset Management Fondsmaeglerselskab
Denmark
$50K +$50.4K +476 New
Canada Pension Plan Investment Board
198
Canada Pension Plan Investment Board
Ontario, Canada
$31.4K +$31.8K +300 New
A
199
AlphaQuest
New York
$29.6K +$30K +283 New
FDCDDQ
200
Federation des caisses Desjardins du Quebec
Quebec, Canada
$29.4K – – –
6 7
8
9 10

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.