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iRhythm Technologies
IRTC

Overview Fund Activity

300 hedge funds and large institutions have $5.44B invested in iRhythm Technologies in 2025 Q2 according to their latest regulatory filings, with 69 funds opening new positions, 101 increasing their positions, 93 reducing their positions, and 22 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
300
Holders Change
+45
Holders Change %
+17.65%
% of All Funds
4.02%
Holding in Top 10
5
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+66.67%
% of All Funds
0.07%
New
69
Increased
101
Reduced
93
Closed
22
Calls
$27.3M
Puts
$37.6M
Net Calls
-$10.3M
Net Calls Change
-$787K

Top Buyers

1
Holocene Advisors
Holocene Advisors
New York
$48.2M
2
Man Group
Man Group
United Kingdom
$41.2M
3
Loomis, Sayles & Company
Loomis, Sayles & Company
Massachusetts
$39.3M
4
D.E. Shaw & Co
D.E. Shaw & Co
New York
$38.2M
5
Wellington Management Group
Wellington Management Group
Massachusetts
$60.9M

Top Sellers

1
Capital Research Global Investors
Capital Research Global Investors
California
$232M
2
Mackenzie Financial
Mackenzie Financial
Ontario, Canada
$112M
3
Westfield Capital Management
Westfield Capital Management
Massachusetts
$44.7M
4
UBS AM
UBS AM
Illinois
$93.6M
5
B
Braidwell
Connecticut
$46.2M
Name Holding Trade Value Shares
Change 		Shares
Change %
Vanguard Group
1
Vanguard Group
Pennsylvania
$498M +$19.6M +127,466 +4%
Sands Capital Management
2
Sands Capital Management
Virginia
$449M -$15.5M -100,680 -3%
BlackRock
3
BlackRock
New York
$423M +$7.13M +46,290 +2%
Artisan Partners
4
Artisan Partners
Wisconsin
$422M -$11.3M -73,439 -3%
Capital Research Global Investors
5
Capital Research Global Investors
California
$232M -$107M -695,758 -32%
State Street
6
State Street
Massachusetts
$134M -$7.57M -49,163 -5%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$118M +$2.61M +16,967 +2%
William Blair & Company
8
William Blair & Company
Illinois
$114M -$7.8M -50,668 -6%
BNP Paribas Asset Management
9
BNP Paribas Asset Management
France
$113M -$22.4M -145,192 -17%
Mackenzie Financial
10
Mackenzie Financial
Ontario, Canada
$112M -$65.6M -426,141 -37%
EAM
11
Eventide Asset Management
Massachusetts
$106M -$7.47M -48,489 -7%
CIP
12
Champlain Investment Partners
Vermont
$102M -$24.9M -161,559 -20%
UBS AM
13
UBS AM
Illinois
$93.6M -$45.5M -295,432 -33%
Fuller & Thaler Asset Management
14
Fuller & Thaler Asset Management
California
$90.3M +$10.5M +68,238 +13%
Bessemer Group
15
Bessemer Group
New Jersey
$87.6M -$748K -4,857 -0.8%
JPMorgan Chase & Co
16
JPMorgan Chase & Co
New York
$86.7M +$106K +687 +0.1%
SIMG
17
Stephens Investment Management Group
Texas
$85.1M +$4.98M +32,334 +6%
Fidelity Investments
18
Fidelity Investments
Massachusetts
$64.7M -$6.62M -43,022 -9%
Allspring Global Investments
19
Allspring Global Investments
North Carolina
$63.4M -$12.3M -84,275 -16%
Wellington Management Group
20
Wellington Management Group
Massachusetts
$60.9M +$35.4M +229,674 +139%
Goldman Sachs
21
Goldman Sachs
New York
$60.8M -$6.03M -39,167 -9%
Bank of New York Mellon
22
Bank of New York Mellon
New York
$53.8M -$1.26M -8,163 -2%
Bank of America
23
Bank of America
North Carolina
$53.5M -$3.74M -24,288 -7%
Millennium Management
24
Millennium Management
New York
$51.8M -$9.77M -63,439 -16%
FAM
25
Fred Alger Management
New York
$50.1M +$11.7M +75,829 +30%
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