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iRhythm Technologies
IRTC

Overview Fund Activity

255 hedge funds and large institutions have $3.77B invested in iRhythm Technologies in 2025 Q1 according to their latest regulatory filings, with 56 funds opening new positions, 79 increasing their positions, 82 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
255
Holders Change
+31
Holders Change %
+13.84%
% of All Funds
3.46%
Holding in Top 10
3
Holding in Top 10 Change
+1
Holding in Top 10 Change %
+50%
% of All Funds
0.04%
New
56
Increased
79
Reduced
82
Closed
22
Calls
$14.4M
Puts
$24M
Net Calls
-$9.56M
Net Calls Change
+$4.76M

Top Buyers

1
UBS AM
1
UBS AM
Illinois
$94.5M
2
Capital Research Global Investors
2
Capital Research Global Investors
California
$231M
3
Fuller & Thaler Asset Management
3
Fuller & Thaler Asset Management
California
$54.2M
4
Point72 Asset Management
4
Point72 Asset Management
Connecticut
$44M
5
Millennium Management
5
Millennium Management
New York
$41.8M

Top Sellers

1
Alyeska Investment Group
1
Alyeska Investment Group
Illinois
$0
2
Citadel Advisors
2
Citadel Advisors
Florida
$325K
3
Mackenzie Financial
3
Mackenzie Financial
Ontario, Canada
$121M
4
Sands Capital Management
4
Sands Capital Management
Virginia
$316M
5
B
5
Braidwell
Connecticut
$58.2M
Name Holding Trade Value Shares
Change 		Shares
Change %
FGP
51
Freestone Grove Partners
California
$14.3M +$12.6M +120,260 +720%
SBH
52
Segall Bryant & Hamill
Illinois
$13.7M -$905K -8,643 -6%
Raymond James Financial
53
Raymond James Financial
Florida
$11.5M +$904K +8,639 +9%
Adage Capital Partners
54
Adage Capital Partners
Massachusetts
$10.5M – – –
Amundi
55
Amundi
France
$10.2M -$747K -7,054 -7%
SAM
56
Silvercrest Asset Management
New York
$9.93M -$26K -248 -0.3%
NL
57
Nuveen LLC
North Carolina
$9.71M +$9.71M +92,729 New
PCM
58
Peregrine Capital Management
Minnesota
$8.69M -$1.69M -16,098 -16%
CWG
59
C WorldWide Group
Denmark
$8.37M – – –
State of Wisconsin Investment Board
60
State of Wisconsin Investment Board
Wisconsin
$7.86M +$65.3K +624 +0.8%
PD
61
Point72 (DIFC)
United Arab Emirates
$7.55M +$7.55M +72,129 New
Ameriprise
62
Ameriprise
Minnesota
$7.19M -$270K -2,577 -4%
Comerica Bank
63
Comerica Bank
Texas
$6.51M -$1.25M -11,982 -16%
Swiss National Bank
64
Swiss National Bank
Switzerland
$6.35M -$73.3K -700 -1%
RG
65
Redmile Group
California
$5.95M +$5.95M +56,844 New
Susquehanna International Group
66
Susquehanna International Group
Pennsylvania
$5.77M +$3.02M +28,886 +110%
Macquarie Group
67
Macquarie Group
Australia
$5.75M +$2.57M +24,520 +81%
EGM
68
Engineers Gate Manager
New York
$5.71M -$771K -7,368 -12%
HCA
69
Harbor Capital Advisors
Illinois
$5.68M -$3.22M -30,714 -36%
Principal Financial Group
70
Principal Financial Group
Iowa
$5.28M +$5M +47,785 +1,794%
PCH
71
Polar Capital Holdings
United Kingdom
$5.21M – – –
CM
72
Castleark Management
Illinois
$5.05M +$5.05M +48,290 New
BPC
73
Banque Pictet & Cie
Switzerland
$4.87M -$1.33M -12,719 -21%
RhumbLine Advisers
74
RhumbLine Advisers
Massachusetts
$4.81M +$314K +2,995 +7%
Jane Street
75
Jane Street
New York
$4.79M +$1.71M +16,309 +55%
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3
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