주식회사 앳코레
MX ˙ BMV ˙ US0476491081
SecurityMX:ATKR / Atkore Inc.
InstitutionMorgan Stanley
Latest Disclosed Ownership338,300 shares
Latest Disclosed Value $ 19,929,360
Morgan Stanley reports 14.68% decrease in ownership of ATKR / Atkore Inc.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 338,300 shares of Atkore Inc. (MX:ATKR) valued at $19,929,360 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 396,507 shares of Atkore Inc.. This represents a change in shares of -14.68% 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)
2026-05-15 2026-03-31 13F ATKORE COM 047649108 338,300 -58,207 -14.68 19,929 -20.54 0.0012
2026-05-27 2025-12-31 13F/A-1 ATKORE COM 047649108 396,507 63,513 19.07 25,079 20.04 0.0015
2026-02-13 2025-12-31 13F ATKORE COM 047649108 396,507 63,513 25,079 0.0015
2026-05-27 2025-09-30 13F/A-1 ATKORE COM 047649108 332,994 8,418 2.59 20,892 -8.76 0.0013
2025-11-14 2025-09-30 13F ATKORE COM 047649108 332,994 8,418 20,892 0.0013
2025-08-15 2025-06-30 13F ATKORE COM 047649108 324,576 4,984 1.56 22,899 19.43 0.0015
2025-05-15 2025-03-31 13F ATKORE COM 047649108 319,592 -17,184 -5.10 19,172 -31.78 0.0014
2025-05-15 2024-12-31 13F/A-1 ATKORE COM 047649108 336,776 -57,769 -14.64 28,104 -15.94 0.0020
2025-02-14 2024-12-31 13F ATKORE COM 047649108 336,776 -57,769 28,104 0.0020
2025-05-14 2024-09-30 13F/A-2 ATKORE COM 047649108 394,545 195,745 98.46 33,434 24.64 0.0024
2025-02-14 2024-09-30 13F/A-1 ATKORE COM 047649108 394,545 195,745 33,434 0.0024
2024-11-14 2024-09-30 13F ATKORE COM 047649108 394,545 195,745 33,434 0.0024
2025-05-14 2024-06-30 13F/A-2 ATKORE COM 047649108 198,800 -1,931 -0.96 26,824 -29.80 0.0021
2024-10-17 2024-06-30 13F/A-1 ATKORE COM 047649108 198,800 -1,931 26,824 0.0021
2024-08-14 2024-06-30 13F ATKORE COM 047649108 198,800 -1,931 26,824 0.0021
2024-10-17 2024-03-31 13F/A-2 ATKORE COM 047649108 200,731 -159,918 -44.34 38,211 -33.78 0.0031
2024-08-16 2024-03-31 13F/A-1 ATKORE COM 047649108 200,731 -159,918 38,211 0.0031
2024-05-15 2024-03-31 13F ATKORE COM 047649108 200,731 -159,918 38,211 0.0031
2024-08-16 2023-12-31 13F/A-1 ATKORE COM 047649108 360,649 47,982 15.35 57,704 23.70 0.0051
2024-02-13 2023-12-31 13F ATKORE COM 047649108 360,649 47,982 57,704 0.0051
2023-11-15 2023-09-30 13F ATKORE COM 047649108 312,667 35,028 12.62 46,647 7.74 0.0047
2023-08-14 2023-06-30 13F ATKORE COM 047649108 277,639 -40,670 -12.78 43,295 -3.18 0.0043
2023-05-15 2023-03-31 13F ATKORE COM 047649108 318,309 109,051 52.11 44,716 88.40 0.0048
2023-02-14 2022-12-31 13F ATKORE COM 047649108 209,258 -17,859 -7.86 23,734 34.30 0.0027
2022-11-14 2022-09-30 13F ATKORE COM 047649108 227,117 -165,044 -42.09 17,672 -45.71 0.0024
2022-10-27 2022-06-30 13F/A-1 ATKORE COM 047649108 392,161 194,632 98.53 32,553 67.41 0.0042
2022-08-15 2022-06-30 13F ATKORE COM 047649108 392,161 194,632 32,553 0.0042
2022-10-27 2022-03-31 13F/A-1 ATKORE COM 047649108 197,529 -88,819 -31.02 19,445 -38.93 0.0026
2022-05-13 2022-03-31 13F ATKORE COM 047649108 197,529 -88,819 19,445 0.0026
2022-02-14 2021-12-31 13F ATKORE COM 047649108 286,348 147,225 105.82 31,839 163.31 0.0039
2021-11-15 2021-09-30 13F ATKORE COM 047649108 139,123 -161,117 -53.66 12,092 -43.28 0.0016
2021-08-23 2021-06-30 13F/A-1 ATKORE COM 047649108 300,240 290,871 3,104.61 21,317 3,067.46 0.0028
2021-08-16 2021-06-30 13F ATKORE COM 047649108 300,240 290,871 21,317 0.0006
2021-05-17 2021-03-31 13F ATKORE COM 047649108 9,369 -48,397 -83.78 673 -71.68 0.0001
2021-02-16 2020-12-31 13F ATKORE INTL GROUP COM 047649108 57,766 -20,763 -26.44 2,376 33.11 0.0004
2020-11-13 2020-09-30 13F ATKORE INTL GROUP COM 047649108 78,529 60,655 339.35 1,785 265.03 0.0003
2020-08-14 2020-06-30 13F ATKORE INTL GROUP COM 047649108 17,874 -42,973 -70.62 489 -61.86 0.0001
2020-05-26 2020-03-31 13F/A-1 ATKORE INTL GROUP COM 047649108 60,847 -66,824 -52.34 1,282 -75.18 0.0003
2020-05-15 2020-03-31 13F ATKORE INTL GROUP COM 047649108 60,847 -66,824 1,282 98.4843
2020-02-14 2019-12-31 13F ATKORE INTL GROUP COM 047649108 127,671 75,209 143.36 5,165 224.43 0.0012
2019-11-14 2019-09-30 13F ATKORE INTL GROUP COM 047649108 52,462 -21,211 -28.79 1,592 -16.47 0.0004
2019-08-14 2019-06-30 13F ATKORE INTL GROUP COM 047649108 73,673 -485 -0.65 1,906 19.35 0.0005
2019-05-15 2019-03-31 13F ATKORE INTL GROUP COM 047649108 74,158 -550,167 -88.12 1,597 -87.11 0.0005
2019-02-14 2018-12-31 13F ATKORE INTL GROUP COM 047649108 624,325 335,387 116.08 12,387 61.58 0.0037
2019-04-23 2018-09-30 13F/A-2 ATKORE INTL GROUP COM 047649108 288,938 -28,573 -9.00 7,666 16.26 0.0019
2018-11-20 2018-09-30 13F/A-1 ATKORE INTL GROUP COM 047649108 288,938 0 7,666 0.0019
2018-11-14 2018-09-30 13F ATKORE INTL GROUP COM 047649108 288,938 -28,573 7,666
2019-04-23 2018-06-30 13F/A-1 ATKORE INTL GROUP COM 047649108 317,511 194,941 159.04 6,594 171.02 0.0018
2018-08-14 2018-06-30 13F ATKORE INTL GROUP COM 047649108 317,511 194,941 6,594
2019-04-23 2018-03-31 13F/A-1 ATKORE INTL GROUP COM 047649108 122,570 -81,177 -39.84 2,433 -44.32 0.0007
2018-05-14 2018-03-31 13F ATKORE INTL GROUP COM 047649108 122,570 -81,177 2,433
2019-04-23 2017-12-31 13F/A-1 ATKORE INTL GROUP COM 047649108 203,747 151,632 290.96 4,370 329.70 0.0012
2018-02-14 2017-12-31 13F ATKORE INTL GROUP COM 047649108 203,747 151,632 4,370
2017-11-14 2017-09-30 13F ATKORE INTL GROUP COM 047649108 52,115 9,922 23.52 1,017 6.83 0.0003
2017-08-11 2017-06-30 13F ATKORE INTL GROUP COM 047649108 42,193 11,187 36.08 952 16.81 0.0003
2017-05-22 2017-03-31 13F/A-1 ATKORE INTL GROUP COM 047649108 31,006 -166,255 -84.28 815 -82.72 0.0003
2017-05-12 2017-03-31 13F ATKORE INTL GROUP COM 047649108 31,006 815
2017-02-22 2016-12-31 13F/A-1 ATKORE INTL GROUP COM 047649108 197,261 -15,501 -7.29 4,717 18.31 0.0015
2017-02-13 2016-12-31 13F ATKORE INTL GROUP COM 047649108 197,261 4,717
2016-11-10 2016-09-30 13F ATKORE INTL GROUP COM 047649108 212,762 61,183 40.36 3,987 64.41 0.0014
2016-08-12 2016-06-30 13F ATKORE INTL GROUP COM 047649108 151,579 151,579 2,425 0.0009
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.