Atkore Inc.
ATKR- Exchange
- NYSE
- Industry
- Miscellaneous Electrical Machinery, Equipment & Supplies
- SEC CIK
- 0001666138
In the last 90 days, Atkore Inc. insiders filed 0 open-market purchases and 1 sale; 326 institutions reported holding it in 13F filings for Q2 2026, worth $2.50B in total; Chou Associates is the only superinvestor holding it.
Holders of 5% or more of ATKR
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Atkore Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 7.30%2.46M shares | – | Oct 17, 20251 filing | Oct 17, 2025 | SEC |
| Vanguard Portfolio Management LLC | 13G | 6.27%2.12M shares | New | Apr 28, 20261 filing | Apr 28, 2026 | SEC |
| American Century Investment Management Inc | 13G | 5.30%1.78M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.25%1.77M shares | New | Apr 29, 20261 filing | Apr 29, 2026 | SEC |
| Gates Capital Management, Inc. | 13G/A | 5.10%1.71M shares | −2.70 ppfrom 7.80% | Feb 14, 20254 filings | Aug 14, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
27 Schedule 13D and 13G filings on Atkore Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20264:01 PM ET | Gates Capital Management, Inc.and 3 others | 13G/A | 5.10%1.71M shares | −2.70 ppfrom 7.80% | Jun 30, 2026 | SEC |
| Aug 14, 20262:32 PM ET | American Century Investment Management Incand 3 others | 13G | 5.30%1.78M shares | New | Jun 30, 2026 | SEC |
| Apr 29, 20264:29 PM ET | Vanguard Capital Management LLC | 13G | 5.25%1.77M shares | New | Mar 31, 2026 | SEC |
| Apr 28, 20264:08 PM ET | Vanguard Portfolio Management LLC | 13G | 6.27%2.12M shares | New | Mar 31, 2026 | SEC |
| Mar 26, 20264:08 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.33 ppfrom 10.33%Below 5% | Mar 13, 2026 | SEC |
| Oct 31, 202510:34 AM ET | First Trust Portfolios LPand 2 others | 13G/A | 3.88%1.31M shares | −1.12 ppfrom 5.00%Below 5% | Sep 30, 2025 | SEC |
| Oct 17, 20256:40 PM ET | BlackRock, Inc. | 13G/A | 7.30%2.46M shares | – | Sep 30, 2025 | SEC |
| Aug 14, 20253:45 PM ET | Gates Capital Management, Inc.and 3 others | 13G/A | 7.80%2.63M shares | −1.70 ppfrom 9.50% | Jun 30, 2025 | SEC |
| Aug 7, 202510:25 AM ET | Vanguard Group Inc | 13G/A | 10.33%3.48M shares | +0.35 ppfrom 9.98% | Jul 31, 2025 | SEC |
| Jul 29, 202511:22 AM ET | Vanguard Group Inc | 13G/A | 9.98%3.36M shares | – | Jun 30, 2025 | SEC |
| May 15, 20256:55 AM ET | Gates Capital Management, Inc.and 3 others | 13G/A | 9.50%3.27M shares | +2.00 ppfrom 7.50% | Mar 31, 2025 | SEC |
| Apr 23, 20254:42 PM ET | First Trust Portfolios LPand 2 others | 13G | 5.00%1.72M shares | New | Mar 31, 2025 | SEC |
| Feb 14, 20253:42 PM ET | Gates Capital Management, Inc.and 3 others | 13G/A | 7.50%2.61M shares | – | Dec 31, 2024 | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Sep 7, 20239:38 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20234:27 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 3, 20224:41 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 26, 2022 | Wells Fargo & Company | 13G/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Wells Fargo & Company | 13GOld format | – | New | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2021 | FMR LLC | 13GOld format | – | New | – | SEC |
| Jan 28, 20215:56 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Atkore Inc. shares.
No Form 144 notices for Atkore Inc. are on file.