ATKR Atkore Inc.
Atkore Inc. (ATKR) Institutional Ownership
What the institutions did with ATKR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 3.1M | 8.7% |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 2.9M | 8.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2.1M | 5.9% |
| AMERICAN CENTURY COMPANIES INC | 1.8M | 5.0% |
| Gates Capital Management, Inc. | 1.7M | 4.8% |
| VANGUARD CAPITAL MANAGEMENT LLC | 1.5M | 4.3% |
| DIMENSIONAL FUND ADVISORS LP | 1.3M | 3.6% |
| LSV ASSET MANAGEMENT | 1.1M | 3.1% |
| STATE STREET CORP | 906.4K | 2.5% |
| GEODE CAPITAL MANAGEMENT, LLC | 902.5K | 2.5% |
| EARNEST PARTNERS LLC | 772.3K | 2.2% |
| Hill City Capital, LP | 724.1K | 2.0% |
| T. Rowe Price Investment Management, Inc. | 647.9K | 1.8% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 575.6K | 1.6% |
| Harding Loevner LP | 567.2K | 1.6% |
| FIRST TRUST ADVISORS LP | 533.1K | 1.5% |
| JPMORGAN CHASE & CO | 520.9K | 1.5% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 519.3K | 1.5% |
| Irenic Capital Management LP | 507.6K | 1.4% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 482.2K | 1.3% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 454.0K | 1.3% |
| BANK OF AMERICA CORP /DE/ | 438.8K | 1.2% |
| TWO SIGMA INVESTMENTS, LP | 402.1K | 1.1% |
| GENDELL JEFFREY L | 400.2K | 1.1% |
| LONDON CO OF VIRGINIA | 386.8K | 1.1% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 39.7K | 2.9M | +2.9M |
| Gates Capital Management, Inc. | Reduced | 2.7M | 1.7M | -975.5K |
| Coliseum Capital Management, LLC | Sold Out | 947.1K | 0 | -947.1K |
| FIRST TRUST ADVISORS LP | Reduced | 1.2M | 533.1K | -693.8K |
| T. Rowe Price Investment Management, Inc. | New | 0 | 647.9K | +647.9K |
| Irenic Capital Management LP | Increased | 14.0K | 507.6K | +493.6K |
| BlackRock, Inc. | Increased | 2.6M | 3.1M | +489.4K |
| Boston Partners | New | 0 | 367.8K | +367.8K |
| AMERICAN CENTURY COMPANIES INC | Increased | 1.4M | 1.8M | +336.0K |
| JPMORGAN CHASE & CO | Increased | 250.3K | 520.9K | +270.6K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | 698.1K | 482.2K | -215.9K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 343.3K | 519.3K | +176.0K |
| CANYON CAPITAL ADVISORS LLC | Reduced | 305.0K | 139.7K | -165.3K |
| CANADA PENSION PLAN INVESTMENT BOARD | Reduced | 247.2K | 102.9K | -144.3K |
| Harding Loevner LP | Reduced | 704.9K | 567.2K | -137.7K |
| Pacer Advisors, Inc. | Reduced | 136.2K | 3.7K | -132.5K |
| DEUTSCHE BANK AG\ | Reduced | 156.1K | 36.3K | -119.8K |
| Trexquant Investment LP | New | 0 | 113.4K | +113.4K |
| Aventail Capital Group, LP | New | 0 | 94.6K | +94.6K |
| TOWLE & CO | New | 0 | 85.8K | +85.8K |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Sold Out | 85.6K | 0 | -85.6K |
| D. E. Shaw & Co., Inc. | Increased | 61.3K | 145.4K | +84.2K |
| PDT Partners, LLC | Increased | 116.2K | 191.3K | +75.1K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 1.2M | 1.3M | +71.8K |
| STATE STREET CORP | Increased | 835.2K | 906.4K | +71.3K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.