Atkore Inc.
US ˙ NYSE ˙ US0476491081

SecurityATKR / Atkore Inc.
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership59,622 shares
Latest Disclosed Value $ 4,206,332
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series reports 2.43% decrease in ownership of ATKR / Atkore Inc.

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 59,622 shares of Atkore Inc. (US:ATKR) valued at $4,206,332 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 61,106 shares of Atkore Inc.. This represents a change in shares of -2.43% during the quarter. The current value of the position is $4,806,129 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)
2025-08-26 2025-06-30 NP Atkore EC US0476491081 59,622 -1,484 -2.43 4,206 14.76 0.0945
2025-05-28 2025-03-31 NP Atkore EC US0476491081 61,106 698 1.16 3,666 -27.30 0.0879
2025-02-25 2024-12-31 NP Atkore EC US0476491081 60,408 -11,815 -16.36 5,041 -17.63 0.1101
2024-11-26 2024-09-30 NP Atkore EC US0476491081 72,223 1,655 2.35 6,120 -35.72 0.1158
2024-08-26 2024-06-30 NP Atkore EC US0476491081 70,568 5,252 8.04 9,522 -23.42 0.1939
2024-05-28 2024-03-31 NP Atkore EC US0476491081 65,316 -3,490 -5.07 12,434 12.95 0.2594
2024-02-26 2023-12-31 NP Atkore EC US0476491081 68,806 3,214 4.90 11,009 12.50 0.2350
2023-11-28 2023-09-30 NP Atkore EC US0476491081 65,592 -2,944 -4.30 9,786 -8.44 0.2553
2023-08-25 2023-06-30 NP Atkore EC US0476491081 68,536 5,827 9.29 10,688 21.32 0.2535
2023-05-26 2023-03-31 NP Atkore EC US0476491081 62,709 -1,736 -2.69 8,809 20.52 0.2346
2023-02-24 2022-12-31 NP Atkore EC US0476491081 64,445 -2,569 -3.83 7,309 40.18 0.2011
2022-11-25 2022-09-30 NP Atkore EC US0476491081 67,014 562 0.85 5,214 -5.47 0.1494
2022-08-25 2022-06-30 NP Atkore EC US0476491081 66,452 -2,209 -3.22 5,516 -18.38 0.1523
2022-05-26 2022-03-31 NP Atkore EC US0476491081 68,661 -1,889 -2.68 6,759 -13.84 0.1575
2022-02-25 2021-12-31 NP Atkore EC US0476491081 70,550 -208 -0.29 7,844 27.54 0.1701
2021-11-24 2021-09-30 NP Atkore EC US0476491081 70,758 0 0.00 6,150 22.44 0.1355
2021-08-26 2021-06-30 NP Atkore EC US0476491081 70,758 -283 -0.40 5,024 -1.64 0.1078
2021-05-27 2021-03-31 NP Atkore EC US0476491081 71,041 -1,865 -2.56 5,108 70.40 0.1158
2021-02-25 2020-12-31 NP Atkore International Group EC US0476491081 72,906 -3,296 -4.33 2,997 73.04 0.0768
2020-11-25 2020-09-30 NP Atkore International Group EC US0476491081 76,202 -3,754 -4.70 1,732 -20.77 0.0556
2020-08-27 2020-06-30 NP Atkore International Group EC US0476491081 79,956 -455 -0.57 2,187 29.04 0.0715
2020-06-01 2020-03-31 NP Atkore International Group EC US0476491081 80,411 8,127 11.24 1,694 -42.07 0.0693
2020-02-27 2019-12-31 NP Atkore International Group EC 047649108 72,284 -109 -0.15 2,925 33.09 0.0879
2019-11-27 2019-09-30 NP Atkore International Group EC US0476491081 72,393 72,393 2,197 0.0726
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.