阿特科雷公司
MX ˙ BMV ˙ US0476491081
SecurityMX:ATKR / Atkore Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership17,312 shares
Latest Disclosed Value $ 1,018,552
Janus Henderson Group Plc reports 22.97% increase in ownership of ATKR / Atkore Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 17,312 shares of Atkore Inc. (MX:ATKR) valued at $1,018,552 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 14,078 shares of Atkore Inc.. This represents a change in shares of 22.97% during the quarter.

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)
2026-05-18 2026-03-31 13F/A-1 ATKORE COM 047649108 17,312 3,234 22.97 1,019 14.51 0.0002
2026-05-15 2026-03-31 13F ATKORE COM 047649108 17,312 3,234 1,019 0.0002
2026-02-17 2025-12-31 13F ATKORE COM 047649108 14,078 0 0.00 890 0.79 0.0004
2025-11-14 2025-09-30 13F ATKORE COM 047649108 14,078 -165,374 -92.16 883 -93.03 0.0004
2025-08-14 2025-06-30 13F ATKORE COM 047649108 179,452 115,807 181.96 12,661 228.40 0.0062
2025-05-15 2025-03-31 13F ATKORE COM 047649108 63,645 -6,583 -9.37 3,856 -34.20 0.0021
2025-02-14 2024-12-31 13F ATKORE COM 047649108 70,228 39,996 132.30 5,860 128.60 0.0030
2024-11-14 2024-09-30 13F ATKORE COM 047649108 30,232 -236 -0.77 2,564 -37.69 0.0013
2024-08-14 2024-06-30 13F ATKORE COM 047649108 30,468 433 1.44 4,113 -28.06 0.0022
2024-05-15 2024-03-31 13F ATKORE COM 047649108 30,035 -500 -1.64 5,717 17.03 0.0031
2024-02-14 2023-12-31 13F ATKORE COM 047649108 30,535 585 1.95 4,886 9.31 0.0029
2023-11-14 2023-09-30 13F ATKORE COM 047649108 29,950 2,454 8.92 4,469 4.27 0.0029
2023-08-14 2023-06-30 13F ATKORE COM 047649108 27,496 3,825 16.16 4,287 28.94 0.0027
2023-05-15 2023-03-31 13F ATKORE COM 047649108 23,671 10,008 73.25 3,325 114.59 0.0022
2023-02-14 2022-12-31 13F ATKORE COM 047649108 13,663 -9,095 -39.96 1,550 -12.54 0.0011
2023-01-13 2022-09-30 13F/A-1 ATKORE COM 047649108 22,758 -1,828 -7.44 1,771 -13.23 0.0013
2022-11-14 2022-09-30 13F ATKORE COM 047649108 22,758 -1,828 1,771 0.0013
2022-08-15 2022-06-30 13F ATKORE COM 047649108 24,586 -4,111 -14.33 2,041 -27.75 0.0014
2022-05-16 2022-03-31 13F ATKORE COM 047649108 28,697 -4,138 -12.60 2,825 -22.62 0.0014
2022-02-14 2021-12-31 13F ATKORE COM 047649108 32,835 11,454 53.57 3,651 96.50 0.0015
2021-11-16 2021-09-30 13F ATKORE COM 047649108 21,381 -633 -2.88 1,858 18.87 0.0008
2021-08-16 2021-06-30 13F ATKORE COM 047649108 22,014 1,516 7.40 1,563 6.04 0.0007
2021-05-17 2021-03-31 13F ATKORE COM 047649108 20,498 10,616 107.43 1,474 263.05 0.0007
2021-02-16 2020-12-31 13F ATKORE INTL GROUP COM 047649108 9,882 -2,795 -22.05 406 40.97 0.0002
2020-11-16 2020-09-30 13F ATKORE INTL GROUP COM 047649108 12,677 -4,790 -27.42 288 -39.75 0.0002
2020-08-14 2020-06-30 13F ATKORE INTL GROUP COM 047649108 17,467 3,056 21.21 478 57.24 0.0003
2020-05-14 2020-03-31 13F ATKORE INTL GROUP COM 047649108 14,411 4,338 43.07 304 -25.49 0.0002
2020-02-18 2019-12-31 13F ATKORE INTL GROUP COM 047649108 10,073 827 8.94 408 45.20 0.0002
2019-11-14 2019-09-30 13F ATKORE INTL GROUP COM 047649108 9,246 318 3.56 281 21.65 0.0002
2019-07-31 2019-06-30 13F ATKORE INTL GROUP COM 047649108 8,928 8,928 231 0.0001
2016-10-24 2016-09-30 13F ATKORE INTL GROUP COM 047649108 0 -13,961 -100.00 0 -100.00
2016-07-29 2016-06-30 13F ATKORE INTL GROUP COM 047649108 13,961 13,961 223 0.0019
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.