Atkore Inc.
MX ˙ BMV ˙ US0476491081
SecurityMX:ATKR / Atkore Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership39,226 shares
Latest Disclosed Value $ 2,310,804
Millennium Management Llc reports 18.04% increase in ownership of ATKR / Atkore Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 39,226 shares of Atkore Inc. (MX:ATKR) valued at $2,310,804 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 33,230 shares of Atkore Inc.. This represents a change in shares of 18.04% 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 39,226 5,996 18.04 2,311 9.95 0.0010
2026-02-17 2025-12-31 13F ATKORE COM 047649108 33,230 -20,189 -37.79 2,102 -37.30 0.0009
2025-11-14 2025-09-30 13F ATKORE COM 047649108 53,419 25,166 89.07 3,352 68.14 0.0014
2025-08-14 2025-06-30 13F ATKORE COM 047649108 28,253 -43,919 -60.85 1,993 -53.96 0.0010
2025-05-15 2025-03-31 13F ATKORE COM 047649108 72,172 -351,292 -82.96 4,330 -87.75 0.0023
2025-02-14 2024-12-31 13F ATKORE COM 047649108 423,464 -32,474 -7.12 35,338 -8.54 0.0173
2024-11-14 2024-09-30 13F ATKORE COM 047649108 455,938 274,818 151.73 38,636 58.10 0.0183
2024-08-14 2024-06-30 13F ATKORE COM 047649108 181,120 82,903 84.41 24,439 30.71 0.0113
2024-05-15 2024-03-31 13F ATKORE COM 047649108 98,217 -98,224 -50.00 18,697 -40.52 0.0080
2024-02-14 2023-12-31 13F ATKORE COM 047649108 196,441 80,530 69.48 31,431 81.76 0.0136
2023-11-14 2023-09-30 13F ATKORE COM 047649108 115,911 -147,769 -56.04 17,293 -57.95 0.0087
2023-08-14 2023-06-30 13F ATKORE COM 047649108 263,680 245,851 1,378.94 41,118 1,541.44 0.0203
2023-05-15 2023-03-31 13F ATKORE COM 047649108 17,829 -15,943 -47.21 2,505 -34.60 0.0014
2023-02-14 2022-12-31 13F ATKORE COM 047649108 33,772 -443,979 -92.93 3,830 -89.70 0.0021
2022-11-14 2022-09-30 13F ATKORE COM 047649108 477,751 408,816 593.05 37,174 549.67 0.0220
2022-08-15 2022-06-30 13F ATKORE COM 047649108 68,935 19,827 40.37 5,722 18.37 0.0035
2022-05-16 2022-03-31 13F ATKORE COM 047649108 49,108 -172,444 -77.83 4,834 -80.38 0.0026
2022-02-14 2021-12-31 13F ATKORE COM 047649108 221,552 28,925 15.02 24,634 47.13 0.0125
2021-11-15 2021-09-30 13F ATKORE COM 047649108 192,627 100,771 109.71 16,743 156.72 0.0100
2021-08-16 2021-06-30 13F ATKORE COM 047649108 91,856 2,850 3.20 6,522 1.91 0.0040
2021-05-17 2021-03-31 13F ATKORE COM 047649108 89,006 -126,157 -58.63 6,400 -27.64 0.0046
2021-02-16 2020-12-31 13F ATKORE INTL GROUP COM 047649108 215,163 21,745 11.24 8,845 101.21 0.0064
2020-11-16 2020-09-30 13F ATKORE INTL GROUP COM 047649108 193,418 70,986 57.98 4,396 31.26 0.0054
2020-08-14 2020-06-30 13F ATKORE INTL GROUP COM 047649108 122,432 112,259 1,103.50 3,349 1,464.95 0.0046
2020-05-14 2020-03-31 13F ATKORE INTL GROUP COM 047649108 10,173 -603,977 -98.34 214 -99.14 0.0005
2020-02-14 2019-12-31 13F ATKORE INTL GROUP COM 047649108 614,150 378,283 160.38 24,849 247.15 0.0311
2019-11-14 2019-09-30 13F ATKORE INTL GROUP COM 047649108 235,867 -14,283 -5.71 7,158 10.62 0.0113
2019-08-15 2019-06-30 13F/A-1 ATKORE INTL GROUP COM 047649108 250,150 -573,858 -69.64 6,471 -63.53 0.0097
2019-08-14 2019-06-30 13F TENABLE HLDGS COM 047649108 138,762 -685,246 3,960
2019-05-14 2019-03-31 13F ATKORE INTL GROUP COM 047649108 824,008 444,265 116.99 17,741 135.48 0.0266
2019-02-15 2018-12-31 13F/A-1 ATKORE INTL GROUP COM 047649108 379,743 -679,488 -64.15 7,534 -73.19 0.0117
2019-02-14 2018-12-31 13F ATKORE INTL GROUP COM 047649108 379,743 7,534
2018-11-14 2018-09-30 13F ATKORE INTL GROUP COM 047649108 1,059,231 413,844 64.12 28,101 109.63 0.0344
2018-08-14 2018-06-30 13F ATKORE INTL GROUP COM 047649108 645,387 -150,720 -18.93 13,405 -15.17 0.0175
2018-05-15 2018-03-31 13F ATKORE INTL GROUP COM 047649108 796,107 35,575 4.68 15,803 -3.13 0.0211
2018-02-14 2017-12-31 13F ATKORE INTL GROUP COM 047649108 760,532 509,199 202.60 16,313 232.65 0.0225
2017-11-14 2017-09-30 13F ATKORE INTL GROUP COM 047649108 251,333 225,112 858.52 4,904 729.78 0.0075
2017-08-14 2017-06-30 13F ATKORE INTL GROUP COM 047649108 26,221 -1,310,395 -98.04 591 -98.32 0.0011
2017-05-15 2017-03-31 13F ATKORE INTL GROUP COM 047649108 1,336,616 774,416 137.75 35,126 161.32 0.0644
2017-02-14 2016-12-31 13F ATKORE INTL GROUP COM 047649108 562,200 -9,836 -1.72 13,442 25.39 0.0281
2016-11-14 2016-09-30 13F ATKORE INTL GROUP COM 047649108 572,036 -638,448 -52.74 10,720 -44.65 0.0180
2016-08-15 2016-06-30 13F ATKORE INTL GROUP COM 047649108 1,210,484 1,210,484 19,368 0.0443
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.