We are live on ! Find out more
IRTC icon

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
Bank of America
26
Bank of America
North Carolina
$38.9M +$12.7M +119,452 +47%
SPC
27
Slate Path Capital
New York
$38.3M -$15.4M -145,100 -28%
Bank of New York Mellon
28
Bank of New York Mellon
New York
$37.4M -$14.2M -133,984 -27%
FLAM
29
First Light Asset Management
Minnesota
$34M -$11.2M -105,454 -24%
Schroder Investment Management Group
30
Schroder Investment Management Group
United Kingdom
$33M +$673K +6,352 +2%
SEI Investments
31
SEI Investments
Pennsylvania
$32.7M -$624K -5,891 -2%
Northern Trust
32
Northern Trust
Illinois
$30.6M +$495K +4,675 +2%
Jennison Associates
33
Jennison Associates
New York
$29.3M +$29.7M +280,187 New
Lord, Abbett & Co
34
Lord, Abbett & Co
New Jersey
$27.1M +$27.4M +258,628 New
Charles Schwab
35
Charles Schwab
California
$26.6M -$521K -4,915 -2%
RSCM
36
Rock Springs Capital Management
Maryland
$26.6M -$15.2M -143,200 -36%
FAM
37
Fred Alger Management
New York
$26.1M -$2.44M -23,059 -8%
Morgan Stanley
38
Morgan Stanley
New York
$24.4M -$2.02M -19,095 -8%
FCM
39
Frontier Capital Management
Massachusetts
$23.5M -$13.8M -130,237 -37%
NCGI
40
Next Century Growth Investors
Minnesota
$21.8M +$22.1M +208,220 New
Deutsche Bank
41
Deutsche Bank
Germany
$21.5M -$3.18K -30 -0%
Barclays
42
Barclays
United Kingdom
$21M -$1.59M -15,029 -7%
Manulife (Manufacturers Life Insurance)
43
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$20.6M +$46.5K +439 +0.2%
Citigroup
44
Citigroup
New York
$19.4M -$536K -5,056 -3%
UBS Group
45
UBS Group
Switzerland
$19.2M +$1.33M +12,511 +7%
Verition Fund Management
46
Verition Fund Management
Connecticut
$17.4M +$17.6M +166,472 New
Wellington Management Group
47
Wellington Management Group
Massachusetts
$17.3M -$7.22M -68,198 -29%
New York State Common Retirement Fund
48
New York State Common Retirement Fund
New York
$16.8M +$3.53M +33,307 +26%
AIMCA
49
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$15.2M – – –
WCM Investment Management
50
WCM Investment Management
California
$14.5M +$24.9K +235 +0.2%
1
2
3 4 5

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.