iRhythm Holdings, Inc.
DE ˙ DB ˙ US4500561067
89,00 € ↑1,00 (1,14%)
2026-06-04
DEL PRIS
SecurityDE:I25 / iRhythm Holdings, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership39,422 shares
Latest Disclosed Value $ 4,652,570
Rhumbline Advisers reports 2.93% decrease in ownership of I25 / iRhythm Holdings, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 39,422 shares of iRhythm Holdings, Inc. (DE:I25) valued at $3,863,356 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 40,610 shares of iRhythm Holdings, Inc.. This represents a change in shares of -2.93% during the quarter. The current value of the position is $3,508,558 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)
2026-05-12 2026-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 39,422 -1,188 -2.93 4,653 -35.43 0.0040
2026-02-13 2025-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 40,610 -6,969 -14.65 7,206 -11.95 0.0058
2025-11-06 2025-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 47,579 -898 -1.85 8,183 9.65 0.0066
2025-08-12 2025-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 48,477 2,531 5.51 7,464 55.19 0.0064
2025-05-29 2025-03-31 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 45,946 2,995 6.97 4,810 24.20 0.0045
2025-04-08 2025-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 45,946 2,995 4,810 0.0045
2025-05-29 2024-12-31 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 42,951 -519 -1.19 3,873 19.99 0.0035
2025-01-30 2024-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 42,951 -519 3,873 0.0035
2024-11-12 2024-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 43,470 -2,211 -4.84 3,227 -34.37 0.0029
2024-08-01 2024-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 45,681 2,209 5.08 4,917 -2.48 0.0046
2024-05-09 2024-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 43,472 620 1.45 5,043 9.94 0.0048
2024-02-08 2023-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 42,852 -215 -0.50 4,587 12.98 0.0048
2023-11-09 2023-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 43,067 716 1.69 4,059 -8.13 0.0047
2023-08-08 2023-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 42,351 1,308 3.19 4,418 88,260.00 0.0049
2023-05-11 2023-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 41,043 666 1.65 5 -99.87 0.0063
2023-02-14 2022-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 40,377 1,063 2.70 3,782 -23.21 0.0051
2022-11-10 2022-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 39,314 3,474 9.69 4,925 27.20 0.0073
2022-08-11 2022-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 35,840 4,768 15.35 3,872 -20.87 0.0057
2022-05-12 2022-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 31,072 -631 -1.99 4,893 31.14 0.0063
2022-02-10 2021-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 31,703 -408 -1.27 3,731 98.46 0.0046
2021-11-12 2021-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 32,111 92 0.29 1,880 -11.49 0.0025
2021-08-05 2021-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 32,019 -3,736 -10.45 2,124 -57.22 0.0028
2021-05-06 2021-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 35,755 -6,001 -14.37 4,965 -49.87 0.0067
2021-02-10 2020-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 41,756 1,511 3.75 9,905 3.36 0.0137
2020-11-12 2020-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 40,245 -8,188 -16.91 9,583 70.73 0.0150
2020-08-13 2020-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 48,433 4,536 10.33 5,613 57.18 0.0094
2020-05-06 2020-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 43,897 -12,459 -22.11 3,571 -6.93 0.0075
2020-02-05 2019-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 56,356 4,629 8.95 3,837 0.10 0.0064
2019-10-23 2019-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 51,727 -7,045 -11.99 3,833 -17.53 0.0070
2019-08-14 2019-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 58,772 18,047 44.31 4,648 52.24 0.0087
2019-05-01 2019-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 40,725 6,891 20.37 3,053 29.86 0.0059
2019-01-31 2018-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 33,834 12,128 55.87 2,351 14.40 0.0051
2018-11-07 2018-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 21,706 -1,293 -5.62 2,055 10.13 0.0040
2018-08-06 2018-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 22,999 9,331 68.27 1,866 116.98 0.0038
2018-05-02 2018-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 13,668 122 0.90 860 13.31 0.0018
2018-02-09 2017-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 13,546 -2,393 -15.01 759 -8.22 0.0015
2017-11-06 2017-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 15,939 190 1.21 827 23.62 0.0018
2017-08-02 2017-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 15,749 9,683 159.63 669 193.42 0.0015
2017-05-02 2017-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 6,066 6,066 228 0.0005
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.