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iRhythm Holdings

302 hedge funds and large institutions have $4.19B invested in iRhythm Holdings in 2026 Q1 according to their latest regulatory filings, with 45 funds opening new positions, 111 increasing their positions, 104 reducing their positions, and 70 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more ownership

Funds ownership:

less funds holding

Funds holding:

33% less capital invested

Capital invested by funds: $6.24B → $4.19B (-$2.05B)

36% less first-time investments, than exits

New positions opened: 45 | Existing positions closed: 70

50% less funds holding in top 10

Funds holding in top 10: 21 (-1)

Holders
302
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
1
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$12M
Puts
$8.98M
Net Calls
Net Calls Change

Top Buyers

1 +$113M
2 +$106M
3 +$81.5M
4
RI
RTW Investments
New York
+$70.2M
5
B
Braidwell
Connecticut
+$56.7M
Name Holding Trade Value Shares
Change
Change in
Stake
PCM
76
Peregrine Capital Management
Minnesota
$7.77M
Swiss National Bank
77
Swiss National Bank
Switzerland
$7.52M
SAM
78
Silvercrest Asset Management
New York
$7.28M
Canada Pension Plan Investment Board
79
Canada Pension Plan Investment Board
Ontario, Canada
$6.94M
AllianceBernstein
80
AllianceBernstein
Tennessee
$6.44M
Renaissance Technologies
81
Renaissance Technologies
New York
$6.35M
Principal Financial Group
82
Principal Financial Group
Iowa
$6.31M
HP
83
HealthInvest Partners
Sweden
$6.26M
Two Sigma Investments
84
Two Sigma Investments
New York
$6.21M
Legal & General Group
85
Legal & General Group
United Kingdom
$6.09M
Amundi
86
Amundi
France
$5.85M
EGM
87
Engineers Gate Manager
New York
$5.81M
State of Wisconsin Investment Board
88
State of Wisconsin Investment Board
Wisconsin
$5.67M
First Trust Advisors
89
First Trust Advisors
Illinois
$5.62M
JF
90
Jump Financial
Illinois
$5.31M
Connor, Clark & Lunn Investment Management (CC&L)
91
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$5M
CCIA
92
Campbell & Co Investment Adviser
Maryland
$4.82M
PHP
93
Parkman Healthcare Partners
Connecticut
$4.74M
RhumbLine Advisers
94
RhumbLine Advisers
Massachusetts
$4.65M
California State Teachers Retirement System (CalSTRS)
95
California State Teachers Retirement System (CalSTRS)
California
$4.4M
T. Rowe Price Associates
96
T. Rowe Price Associates
Maryland
$4.21M
HIM
97
Hillsdale Investment Management
Ontario, Canada
$4.12M
SCM
98
Sirios Capital Management
Massachusetts
$4.1M
AQR Capital Management
99
AQR Capital Management
Connecticut
$4.08M
Verition Fund Management
100
Verition Fund Management
Connecticut
$4.08M