iRhythm Holdings, Inc.
DE ˙ DB ˙ US4500561067
90,00 € ↓ -5,50 (-5,76%)
2026-06-02
DEL PRIS
SecurityDE:I25 / iRhythm Holdings, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership1,246,524 shares
Ownership 4.14%
Mackenzie Financial Corp ownership in I25 / iRhythm Holdings, Inc.

2023-01-27 - Mackenzie Financial Corp has filed an SC 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,246,524 shares of iRhythm Holdings, Inc. (DE:I25). This represents 4.14 percent ownership of the company. In their previous filing dated 2022-02-04 , Mackenzie Financial Corp had reported owning 1,685,430 shares, indicating a decrease of -26.04 percent.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date
Effective
Date
Form Prev
Shares
Latest
Shares
ΔShares
(Percent)
Ownership
(Percent)
ΔOwnership
(Percent)
2023-01-27 2023-01-27 13G/A 1,685,430 1,246,524 -26.04 4.14 -27.75
2022-02-04 2022-02-04 13G/A 1,685,430 5.73

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-13 2026-03-31 13F IRHYTHM HOLDINGS COM 450056106 371,475 24,171 6.96 43,841 -29.17 0.0526
2026-02-18 2025-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 347,304 -107,957 -23.71 61,896 -20.95 0.0733
2025-11-13 2025-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 455,261 -274,552 -37.62 78,300 -30.31 0.0948
2025-08-13 2025-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 729,813 -426,141 -36.86 112,362 -7.14 0.1456
2025-05-07 2025-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,155,954 -225,988 -16.35 121,005 -2.89 0.1721
2025-05-02 2024-12-31 13F/A-2 IRHYTHM TECHNOLOGIES COM 450056106 1,381,942 -37,892 -2.67 124,610 18.22 0.1698
2025-02-20 2024-12-31 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 1,381,942 -37,892 124,610 0.1619
2025-02-14 2024-12-31 13F iRhythm Technologies Common Stock 450056106 1,381,942 -37,892 48,155 0.0691
2024-11-13 2024-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,419,834 -8,490 -0.59 105,408 -31.44 0.1467
2024-08-14 2024-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,428,324 80,091 5.94 153,745 -1.70 0.2284
2024-05-10 2024-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,348,233 83,526 6.60 156,395 15.53 0.2254
2024-01-30 2023-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,264,707 2,528 0.20 135,374 21.49 0.2042
2023-10-25 2023-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,262,179 41,052 3.36 111,425 -12.30 0.1873
2023-08-03 2023-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,221,127 -16,301 -1.32 127,046 -17.22 0.1927
2023-04-24 2023-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,237,428 -9,096 -0.73 153,478 31.45 0.2371
2023-02-14 2022-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,246,524 36,189 2.99 116,762 -23.00 0.1950
2022-10-07 2022-09-30 13F iRhythm Technologies Common Stock 450056106 1,210,335 -3,094 -0.25 151,631 15.67 0.2608
2022-08-10 2022-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,213,429 37,587 3.20 131,087 -29.20 0.2100
2022-05-13 2022-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,175,842 -509,588 -30.23 185,160 -6.65 0.2483
2022-02-14 2021-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 1,685,430 -216,621 -11.39 198,358 78.08 0.2672
2021-11-08 2021-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,902,051 88,698 4.89 111,384 -7.42 0.1580
2021-08-11 2021-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 1,813,353 1,798,417 12,040.82 120,316 9,802.55 0.1673
2020-05-14 2020-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 14,936 -2,698 -15.30 1,215 1.17 0.0039
2020-02-13 2019-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 17,634 17,634 1,201 0.0030
2018-05-14 2018-03-31 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 0 -9,230 -100.00 0 -100.00
2018-02-13 2017-12-31 13F IRHYTHM TECHNOLOGIES COM 450056106 9,230 -11,400 -55.26 517 -51.68 0.0012
2017-11-13 2017-09-30 13F IRHYTHM TECHNOLOGIES COM 450056106 20,630 -7,870 -27.61 1,070 -11.64 0.0058
2017-08-14 2017-06-30 13F IRHYTHM TECHNOLOGIES COM 450056106 28,500 0 0.00 1,211 12.97 0.0067
2017-05-25 2017-03-31 13F/A-1 IRHYTHM TECHNOLOGIES COM 450056106 28,500 28,500 1,072 0.0063
2017-05-12 2017-03-31 13F IRHYTHM TECHNOLOGIES COM 450056106 28,500 1,072 0.0062
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.