Atkore Inc.
US ˙ NYSE ˙ US0476491081

SecurityATKR / Atkore Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,227,991 shares
Latest Disclosed Value $ 72,340,574
Dimensional Fund Advisors Lp reports 8.63% increase in ownership of ATKR / Atkore Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,227,991 shares of Atkore Inc. (US:ATKR) valued at $72,340,950 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,130,477 shares of Atkore Inc.. This represents a change in shares of 8.63% during the quarter. The current value of the position is $98,988,355 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)
2026-05-07 2026-03-31 13F ATKORE COM 047649108 1,227,991 97,514 8.63 72,341 1.17 0.0032
2026-02-12 2025-12-31 13F ATKORE COM 047649108 1,130,477 94,398 9.11 71,503 10.01 0.0150
2025-11-12 2025-09-30 13F ATKORE COM 047649108 1,036,079 18,951 1.86 64,998 -9.43 0.0139
2025-08-12 2025-06-30 13F ATKORE COM 047649108 1,017,128 -9,221 -0.90 71,762 16.55 0.0166
2025-05-13 2025-03-31 13F ATKORE COM 047649108 1,026,349 -64,468 -5.91 61,570 -32.36 0.0153
2025-02-13 2024-12-31 13F ATKORE COM 047649108 1,090,817 6,234 0.57 91,028 -0.96 0.0219
2024-11-07 2024-09-30 13F ATKORE COM 047649108 1,084,583 132,358 13.90 91,909 -28.46 0.0223
2024-08-09 2024-06-30 13F ATKORE COM 047649108 952,225 -51,482 -5.13 128,479 -32.76 0.0336
2024-05-10 2024-03-31 13F ATKORE COM 047649108 1,003,707 -63,455 -5.95 191,066 11.90 0.0517
2024-02-07 2023-12-31 13F ATKORE COM 047649108 1,067,162 3,568 0.34 170,753 7.60 0.0499
2023-11-09 2023-09-30 13F ATKORE COM 047649108 1,063,594 9,235 0.88 158,688 -3.49 0.0520
2023-08-09 2023-06-30 13F ATKORE COM 047649108 1,054,359 10,449 1.00 164,418 12.12 0.0524
2023-05-12 2023-03-31 13F ATKORE COM 047649108 1,043,910 33,552 3.32 146,646 128,535.96 0.0494
2023-02-09 2022-12-31 13F ATKORE COM 047649108 1,010,358 9,367 0.94 115 -99.85 0.0339
2022-11-10 2022-09-30 13F ATKORE COM 047649108 1,000,991 25,060 2.57 77,886 -3.85 0.0299
2022-08-12 2022-06-30 13F ATKORE COM 047649108 975,931 -138,677 -12.44 81,008 -26.17 0.0291
2022-05-13 2022-03-31 13F ATKORE COM 047649108 1,114,608 -51,829 -4.44 109,727 -15.39 0.0338
2022-02-09 2021-12-31 13F ATKORE COM 047649108 1,166,437 -27,014 -2.26 129,690 25.00 0.0392
2021-11-12 2021-09-30 13F ATKORE COM 047649108 1,193,451 -8,654 -0.72 103,751 21.56 0.0334
2021-08-12 2021-06-30 13F ATKORE COM 047649108 1,202,105 -81,105 -6.32 85,348 -7.49 0.0270
2021-05-14 2021-03-31 13F ATKORE COM 047649108 1,283,210 -34,687 -2.63 92,260 70.29 0.0305
2021-03-08 2020-12-31 13F/A-2 ATKORE INTL GROUP COM 047649108 1,317,897 -1,735 -0.13 54,179 80.63 0.0196
2021-02-11 2020-12-31 13F ATKORE INTL GROUP COM 047649108 1,317,897 -1,735 54,179 19,566.5750
2020-11-12 2020-09-30 13F ATKORE INTL GROUP COM 047649108 1,319,632 -29,249 -2.17 29,995 -18.69 0.0127
2020-08-13 2020-06-30 13F ATKORE INTL GROUP COM 047649108 1,348,881 18,131 1.36 36,890 31.57 0.0162
2020-05-14 2020-03-31 13F ATKORE INTL GROUP COM 047649108 1,330,750 23,557 1.80 28,038 -46.99 0.0146
2020-02-14 2019-12-31 13F ATKORE INTL GROUP COM 047649108 1,307,193 -12,914 -0.98 52,890 32.01 0.0193
2019-11-12 2019-09-30 13F ATKORE INTL GROUP COM 047649108 1,320,107 -24,421 -1.82 40,065 15.19 0.0156
2019-08-13 2019-06-30 13F ATKORE INTL GROUP COM 047649108 1,344,528 -18,790 -1.38 34,783 18.50 0.0135
2019-08-12 2019-03-31 13F/A-2 ATKORE INTL GROUP COM 047649108 1,363,318 20,800 1.55 29,352 10.20 0.0117
2019-05-10 2019-03-31 13F ATKORE INTL GROUP COM 047649108 1,363,318 20,800 29,352
2019-02-26 2018-12-31 13F/A-1 ATKORE INTL GROUP COM 047649108 1,342,518 41,883 3.22 26,636 -22.81 0.0121
2019-02-13 2018-12-31 13F ATKORE INTL GROUP COM 047649108 1,342,518 41,883 26,636
2018-11-13 2018-09-30 13F ATKORE INTL GROUP COM 047649108 1,300,635 71,522 5.82 34,505 35.16 0.0131
2018-08-10 2018-06-30 13F ATKORE INTL GROUP COM 047649108 1,229,113 457,055 59.20 25,529 66.58 0.0102
2018-05-11 2018-03-31 13F ATKORE INTL GROUP COM 047649108 772,058 379,629 96.74 15,325 82.05 0.0064
2018-02-12 2017-12-31 13F ATKORE INTL GROUP COM 047649108 392,429 257,310 190.43 8,418 219.35 0.0035
2017-11-13 2017-09-30 13F ATKORE INTL GROUP COM 047649108 135,119 135,119 2,636 0.0012
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.