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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 55 funds opening new positions, 80 increasing their positions, 82 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
255
Holders Change
+30
Holders Change %
+13.33%
% 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
55
Increased
80
Reduced
82
Closed
22
Calls
$14.4M
Puts
$24M
Net Calls
-$9.56M
Net Calls Change
+$4.76M

Top Buyers

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

Top Sellers

1
Alyeska Investment Group
Alyeska Investment Group
Illinois
$0
2
Citadel Advisors
Citadel Advisors
Florida
$325K
3
Mackenzie Financial
Mackenzie Financial
Ontario, Canada
$121M
4
Sands Capital Management
Sands Capital Management
Virginia
$316M
5
B
Braidwell
Connecticut
$58.2M
Name Holding Trade Value Shares
Change 		Shares
Change %
WWM
251
Wolff Wiese Magana
California
$524 – – –
MCM
252
MV Capital Management
Maryland
$315 +$105 +1 +50%
AWM
253
Activest Wealth Management
Florida
$314 +$314 +3 New
DFA
254
DHJJ Financial Advisors
Illinois
$210 – – –
SS
255
SBI Securities
Japan
$105 – – –
Alyeska Investment Group
256
Alyeska Investment Group
Illinois
– -$31.7M -351,745 Closed
DM
257
Deerfield Management
New York
– -$14.1M -156,012 Closed
PA
258
Perceptive Advisors
New York
– -$5.87M -65,153 Closed
Axa
259
Axa
France
– -$2.93M -32,473 Closed
BPC
260
Bryce Point Capital
New York
– -$1.27M -14,093 Closed
MCM
261
Monimus Capital Management
New Jersey
– -$1.05M -11,659 Closed
PAMP
262
Polar Asset Management Partners
Ontario, Canada
– -$992K -11,000 Closed
Simplex Trading
263
Simplex Trading
Illinois
– -$643K -7,139 Closed
Qube Research & Technologies (QRT)
264
Qube Research & Technologies (QRT)
United Kingdom
– -$555K -6,159 Closed
Nomura Holdings
265
Nomura Holdings
Japan
– -$488K -5,413 Closed
FC
266
Farringdon Capital
United Kingdom
– -$426K -4,721 Closed
BA
267
Bridgewater Associates
Connecticut
– -$303K -3,364 Closed
Brown Advisory
268
Brown Advisory
Maryland
– -$296K -3,280 Closed
VI
269
Versor Investments
New York
– -$251K -2,780 Closed
RAM
270
Ramirez Asset Management
New York
– -$72.1K -800 Closed
RS
271
R Squared
Hong Kong
– -$45.1K -500 Closed
EC
272
Elequin Capital
New York
– -$9.56K -106 Closed
AAP
273
Arax Advisory Partners
Colorado
– -$2.26K -25 Closed
AWM
274
Avior Wealth Management
Nebraska
– -$2.07K -23 Closed
ACM
275
Aster Capital Management
United Arab Emirates
– -$180 -2 Closed
8 9 10
11
12