주식회사 앳코레
US ˙ NYSE ˙ US0476491081

SecurityATKR / Atkore Inc.
InstitutionState Street Corp
Latest Disclosed Ownership835,156 shares
Latest Disclosed Value $ 49,199,040
State Street Corp reports 0.92% increase in ownership of ATKR / Atkore Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 835,156 shares of Atkore Inc. (US:ATKR) valued at $49,199,040 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 827,521 shares of Atkore Inc.. This represents a change in shares of 0.92% during the quarter. The current value of the position is $70,929,799 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 835,156 7,635 0.92 49,199 -6.00 0.0017
2026-02-13 2025-12-31 13F ATKORE COM 047649108 827,521 -7,456 -0.89 52,341 -0.09 0.0018
2025-11-14 2025-09-30 13F ATKORE COM 047649108 834,977 -38,550 -4.41 52,386 -15.00 0.0018
2025-08-14 2025-06-30 13F ATKORE COM 047649108 873,527 23,583 2.77 61,627 20.87 0.0023
2025-05-15 2025-03-31 13F ATKORE COM 047649108 849,944 -41,019 -4.60 50,988 -31.42 0.0021
2025-02-14 2024-12-31 13F ATKORE COM 047649108 890,963 10,572 1.20 74,351 -0.34 0.0029
2024-11-14 2024-09-30 13F ATKORE COM 047649108 880,391 -13,524 -1.51 74,604 -38.15 0.0030
2024-08-14 2024-06-30 13F ATKORE COM 047649108 893,915 -4,868 -0.54 120,616 -29.50 0.0053
2024-05-15 2024-03-31 13F ATKORE COM 047649108 898,783 5,183 0.58 171,092 19.66 0.0076
2024-02-14 2023-12-31 13F ATKORE COM 047649108 893,600 24,643 2.84 142,976 10.29 0.0070
2023-11-14 2023-09-30 13F ATKORE COM 047649108 868,957 -5,940 -0.68 129,640 -4.98 0.0072
2023-08-14 2023-06-30 13F ATKORE COM 047649108 874,897 -14,616 -1.64 136,431 9.18 0.0072
2023-05-15 2023-03-31 13F ATKORE COM 047649108 889,513 -1,681 -0.19 124,959 23.62 0.0071
2023-05-15 2022-12-31 13F/A-99 ATKORE COM 047649108 891,194 -17,115 -1.88 101,079 43.02 0.0059
2023-05-15 2022-12-31 13F ATKORE COM 047649108 891,194 -17,115 101,079 0.0059
2022-11-15 2022-09-30 13F ATKORE COM 047649108 908,309 -7,629 -0.83 70,676 -7.04 0.0045
2022-08-15 2022-06-30 13F ATKORE COM 047649108 915,938 -34,306 -3.61 76,032 -18.72 0.0046
2022-05-16 2022-03-31 13F ATKORE COM 047649108 950,244 20,685 2.23 93,542 -9.50 0.0046
2022-02-14 2021-12-31 13F ATKORE COM 047649108 929,559 11,532 1.26 103,358 29.53 0.0049
2021-11-15 2021-09-30 13F ATKORE COM 047649108 918,027 -27,687 -2.93 79,795 18.84 0.0042
2021-08-16 2021-06-30 13F ATKORE COM 047649108 945,714 14,514 1.56 67,146 0.29 0.0035
2021-07-09 2021-03-31 13F/A-1 ATKORE COM 047649108 931,200 -46,090 -4.72 66,953 66.65 0.0038
2021-05-17 2021-03-31 13F ATKORE COM 047649108 931,200 -46,090 66,953 0.0038
2021-02-16 2020-12-31 13F ATKORE INTL GROUP COM 047649108 977,290 -38,314 -3.77 40,176 74.04 0.0025
2020-11-10 2020-09-30 13F ATKORE INTL GROUP COM 047649108 1,015,604 -37,351 -3.55 23,085 -19.84 0.0016
2020-08-14 2020-06-30 13F ATKORE INTL GROUP COM 047649108 1,052,955 75,349 7.71 28,798 39.81 0.0021
2020-06-19 2020-03-31 13F/A-1 ATKORE INTL GROUP COM 047649108 977,606 -29,673 -2.95 20,598 -49.46 0.0018
2020-05-11 2020-03-31 13F ATKORE INTL GROUP COM 047649108 977,606 -29,673 20,598 1,808.9191
2020-02-06 2019-12-31 13F ATKORE INTL GROUP COM 047649108 1,007,279 41,173 4.26 40,755 39.00 0.0028
2019-11-14 2019-09-30 13F ATKORE INTL GROUP COM 047649108 966,106 19,287 2.04 29,321 19.71 0.0022
2019-08-14 2019-06-30 13F ATKORE INTL GROUP COM 047649108 946,819 105,458 12.53 24,494 35.21 0.0018
2019-05-15 2019-03-31 13F ATKORE INTL GROUP COM 047649108 841,361 -60,954 -6.76 18,115 1.19 0.0014
2019-02-12 2018-12-31 13F ATKORE INTL GROUP COM 047649108 902,315 23,678 2.69 17,902 -23.21 0.0016
2018-11-09 2018-09-30 13F ATKORE INTL GROUP Common equity shares 047649108 878,637 38,097 4.53 23,312 33.52 0.0018
2018-08-14 2018-06-30 13F ATKORE INTL GROUP Common equity shares 047649108 840,540 168,157 25.01 17,459 30.80 0.0015
2018-05-15 2018-03-31 13F ATKORE INTL GROUP Common equity shares 047649108 672,383 -10,410 -1.52 13,348 -8.85 0.0011
2018-02-14 2017-12-31 13F ATKORE INTL GROUP Common equity shares 047649108 682,793 126,689 22.78 14,644 34.98 0.0012
2017-11-14 2017-09-30 13F ATKORE INTL GROUP Common equity shares 047649108 556,104 22,929 4.30 10,849 -9.76 0.0009
2017-08-14 2017-06-30 13F ATKORE INTL GROUP Common equity shares 047649108 533,175 330,633 163.24 12,022 125.98 0.0011
2017-05-15 2017-03-31 13F ATKORE INTL GROUP Common equity shares 047649108 202,542 21,600 11.94 5,320 22.98 0.0005
2017-02-09 2016-12-31 13F ATKORE INTL GROUP Common equity shares 047649108 180,942 60,733 50.52 4,326 92.01 0.0004
2017-01-13 2016-09-30 13F/A-1 ATKORE INTL GROUP Common equity shares 047649108 120,209 120,209 2,253 0.0002
2016-11-14 2016-09-30 13F ATKORE INTL GROUP Common equity shares 047649108 120,209 2,253 0.0003
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.