ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
Position in IRTC — iRhythm Holdings, Inc.
CIK 1164508
BOSTON, MA
Position in IRTC
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$68,791,379
-$38,909,200 QoQ
Shares Held
582,879
-4.0% QoQ
Ownership
1.77%
of shares outstanding
% of Portfolio
0.04%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Jun 2025
4 quarters on record
Voting authority
Sole 99.60798038701.ToString("F0")%
Shared 0.ToString("F0")%
None 0.3920196129900031.ToString("F0")%
Common Shares in IRTC Over Time
Shares Held
Position Value (USD)
Position in Medical Devices
Healthcare · as of Mar 31, 2026ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $3,649,670,055 across 35 Medical Devices names. IRTC ranks #13 (1.9% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | BSX |
Boston Scientific Corp
|
13,891,668 | $871,702,167 | |
| 2 | ABT |
Abbott Laboratories
|
5,522,222 | $566,966,532 | |
| 3 | SYK |
Stryker Corp
|
1,555,638 | $511,167,090 | |
| 4 | MDT |
Medtronic plc
|
4,659,425 | $403,739,176 | |
| 5 | PODD |
Insulet Corp
|
1,229,928 | $258,088,091 | |
| 6 | DXCM |
Dexcom Inc
|
2,545,103 | $159,832,468 | |
| 7 | EW |
Edwards Lifesciences Corp
|
1,890,859 | $151,419,988 | |
| 8 | PEN |
Penumbra Inc
|
400,160 | $131,400,539 |
All Filings in IRTC
Export CSV
4 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $68,791,379 | 582,879 | Shares | Defined | 2026-05-14 | |
| 2025-12-31 | $107,700,579 | 606,969 | Shares | Defined | 2026-02-13 | |
| 2025-09-30 | $93,053,297 | 541,039 | Shares | Defined | 2025-11-13 | |
| 2025-06-30 | $1,278,483 | 8,304 | Shares | Defined | 2025-08-13 | |
| No filing history on record for this holder in this stock. | ||||||