Atkore Inc.
US ˙ NYSE ˙ US0476491081

SecurityATKR / Atkore Inc.
InstitutionMan Group plc
Latest Disclosed Ownership150,330 shares
Latest Disclosed Value $ 8,855,940
Man Group plc reports 146.35% increase in ownership of ATKR / Atkore Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 150,330 shares of Atkore Inc. (US:ATKR) valued at $8,855,940 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 61,024 shares of Atkore Inc.. This represents a change in shares of 146.35% during the quarter. The current value of the position is $12,781,057 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)
2026-05-15 2026-03-31 13F ATKORE COM 047649108 150,330 89,306 146.35 8,856 129.46 0.0161
2026-02-17 2025-12-31 13F ATKORE COM 047649108 61,024 35,692 140.90 3,860 142.86 0.0066
2025-11-14 2025-09-30 13F ATKORE COM 047649108 25,332 16,295 180.31 1,589 149.45 0.0028
2025-08-14 2025-06-30 13F ATKORE COM 047649108 9,037 9,037 638 0.0012
2025-05-15 2025-03-31 13F ATKORE COM 047649108 0 -87,482 -100.00 0 -100.00
2025-02-14 2024-12-31 13F ATKORE COM 047649108 87,482 64,019 272.85 7,300 267.20 0.0192
2024-11-14 2024-09-30 13F ATKORE COM 047649108 23,463 1,627 7.45 1,988 -32.52 0.0052
2024-08-14 2024-06-30 13F ATKORE COM 047649108 21,836 -7,498 -25.56 2,946 -47.24 0.0074
2024-05-15 2024-03-31 13F ATKORE COM 047649108 29,334 -45,986 -61.05 5,584 -53.66 0.0141
2024-02-14 2023-12-31 13F ATKORE COM 047649108 75,320 12,051 -22.73 0.0336
2023-11-14 2023-09-30 13F ATKORE COM 047649108 15,596 -49.66 0.0483
2023-08-14 2023-06-30 13F ATKORE COM 047649108 198,658 30,979 36.92 0.0956
2023-05-15 2023-03-31 13F ATKORE COM 047649108 22,625 48.00 0.0805
2023-02-14 2022-12-31 13F ATKORE COM 047649108 134,790 1,231 0.92 15,288 47.10 0.0548
2022-11-14 2022-09-30 13F ATKORE COM 047649108 133,559 10,392 44.94 0.0482
2022-08-15 2022-06-30 13F ATKORE COM 047649108 7,170 38.74 0.0304
2022-05-16 2022-03-31 13F ATKORE COM 047649108 52,489 -153,026 -74.46 5,168 -77.38 0.0180
2022-02-14 2021-12-31 13F ATKORE COM 047649108 205,515 -5,264 -2.50 22,851 24.73 0.0735
2021-11-15 2021-09-30 13F ATKORE COM 047649108 210,779 146,415 227.48 18,320 300.96 0.0643
2021-08-16 2021-06-30 13F ATKORE COM 047649108 64,364 5,667 9.65 4,569 8.27 0.0161
2021-05-17 2021-03-31 13F ATKORE COM 047649108 58,697 -377,692 -86.55 4,220 -76.48 0.0186
2021-02-16 2020-12-31 13F ATKORE INTL GROUP COM 047649108 436,389 -199,054 -31.33 17,941 24.21 0.0788
2020-11-16 2020-09-30 13F ATKORE INTL GROUP COM 047649108 635,443 142,370 28.87 14,444 7.10 0.0568
2020-08-14 2020-06-30 13F ATKORE INTL GROUP COM 047649108 493,073 -91,351 -15.63 13,486 9.52 0.0680
2020-05-15 2020-03-31 13F ATKORE INTL GROUP COM 047649108 584,424 -47,713 -7.55 12,314 -51.86 0.0798
2020-02-18 2019-12-31 13F ATKORE INTL GROUP COM 047649108 632,137 167,010 35.91 25,577 81.19 0.0841
2019-11-14 2019-09-30 13F ATKORE INTL GROUP COM 047649108 465,127 -333,764 -41.78 14,116 -31.70 0.0524
2019-08-14 2019-06-30 13F ATKORE INTL GROUP COM 047649108 798,891 -227,577 -22.17 20,668 -6.48 0.0747
2019-05-15 2019-03-31 13F ATKORE INTL GROUP COM 047649108 1,026,468 -196,040 -16.04 22,100 -8.88 0.0838
2019-02-14 2018-12-31 13F ATKORE INTL GROUP COM 047649108 1,222,508 27,611 2.31 24,255 -23.49 0.1079
2018-11-14 2018-09-30 13F ATKORE INTL GROUP COM 047649108 1,194,897 -134,141 -10.09 31,701 14.84 0.1158
2018-08-14 2018-06-30 13F ATKORE INTL GROUP COM 047649108 1,329,038 -39,200 -2.86 27,604 1.63 0.1136
2018-05-15 2018-03-31 13F ATKORE INTL GROUP COM 047649108 1,368,238 1,368,238 27,160 0.1243
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.