iRhythm Holdings, Inc.
DE ˙ DB ˙ US4500561067
89,00 € ↑1,00 (1,14%)
2026-06-04
DEL PRIS
SecurityDE:I25 / iRhythm Holdings, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership285,086 shares
Latest Disclosed Value $ 33,645,849
Northern Trust Corp reports 2.16% increase in ownership of I25 / iRhythm Holdings, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 285,086 shares of iRhythm Holdings, Inc. (DE:I25) valued at $27,938,428 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 279,070 shares of iRhythm Holdings, Inc.. This represents a change in shares of 2.16% during the quarter. The current value of the position is $25,372,654 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F IRHYTHM HOLDINGS COM 450056106 285,086 6,016 2.16 33,646 -32.06 0.0044
2026-02-17 2025-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 279,070 -15,301 -5.20 49,518 -2.19 0.0063
2025-11-14 2025-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 294,371 5,054 1.75 50,629 13.66 0.0065
2025-08-13 2025-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 289,317 -2,692 -0.92 44,543 45.72 0.0061
2025-05-13 2025-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 292,009 4,675 1.63 30,568 17.98 0.0045
2025-02-14 2024-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 287,334 18,816 7.01 25,909 29.97 0.0037
2024-11-13 2024-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 268,518 1,807 0.68 19,935 -30.56 0.0033
2024-08-14 2024-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 266,711 -15,229 -5.40 28,709 -12.22 0.0048
2024-05-14 2024-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 281,940 -7,282 -2.52 32,705 5.64 0.0057
2024-02-13 2023-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 289,222 -7,758 -2.61 30,958 10.59 0.0056
2023-11-13 2023-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 296,980 1,715 0.58 27,993 -9.12 0.0054
2023-08-11 2023-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 295,265 10,575 3.71 30,802 -12.77 0.0059
2023-05-15 2023-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 284,690 4,511 1.61 35,310 34.55 0.0070
2023-02-13 2022-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 280,179 3,005 1.08 26,244 -24.43 0.0055
2022-11-14 2022-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 277,174 -3,407 -1.21 34,726 14.57 0.0079
2022-08-12 2022-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 280,581 -6,111 -2.13 30,311 -32.86 0.0065
2022-05-13 2022-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 286,692 -11,049 -3.71 45,145 28.83 0.0079
2022-02-08 2021-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 297,741 -7,578 -2.48 35,041 95.98 0.0057
2021-11-15 2021-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 305,319 -5,730 -1.84 17,880 -13.37 0.0032
2021-08-13 2021-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 311,049 -3,156 -1.00 20,639 -52.70 0.0036
2021-05-12 2021-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 314,205 -15,802 -4.79 43,632 -44.26 0.0081
2021-02-11 2020-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 330,007 7,107 2.20 78,280 1.81 0.0152
2020-11-16 2020-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 322,900 636 0.20 76,886 105.86 0.0169
2020-08-14 2020-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 322,264 2,788 0.87 37,348 43.71 0.0088
2020-05-14 2020-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 319,476 6,415 2.05 25,989 21.92 0.0075
2020-02-14 2019-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 313,061 -12,480 -3.83 21,316 -11.65 0.0048
2019-11-13 2019-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 325,541 21,421 7.04 24,126 0.31 0.0058
2019-08-13 2019-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 304,120 4,036 1.34 24,051 6.92 0.0057
2019-05-13 2019-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 300,084 3,493 1.18 22,495 9.17 0.0056
2019-02-12 2018-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 296,591 -2,634 -0.88 20,606 -27.25 0.0058
2018-11-14 2018-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 299,225 14,943 5.26 28,326 22.83 0.0069
2018-09-18 2018-06-30 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 284,282 93,656 49.13 23,062 92.18 0.0059
2018-08-14 2018-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 285,759 95,133 23,182
2018-05-09 2018-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 190,626 2,195 1.16 12,000 13.63 0.0031
2018-02-14 2017-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 188,431 869 0.46 10,561 8.53 0.0027
2017-11-13 2017-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 187,562 28,652 18.03 9,731 44.12 0.0025
2017-08-11 2017-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 158,910 68,477 75.72 6,752 98.59 0.0019
2017-05-12 2017-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 90,433 6,118 7.26 3,400 34.44 0.0010
2017-02-13 2016-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 84,315 84,315 2,529 0.0008
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.