ATKR Institutional Ownership & Shareholders
ATKORE INC (ATKR) is currently held by 310 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $2.49B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATKR tracked by InsiderSet, reporting ownership valued at approximately $236.96M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $295.92M, representing an estimated gain of +24.88% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 48% of the total disclosed ATKR value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Portfolio Management Llc, American Century Companies Inc, and several other long-term asset managers with concentrated positions in ATKORE INC (ATKR).
This page ranks the largest institutional ATKR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
310
Total Reported Value
$2.49B
Largest Holder
Blackrock, Inc.
Largest Position
$236.96M
Insider Transactions (90d)
41
Latest Filing Quarter
Q2 2026
New Institutional Positions
68
Funds Exiting Positions
1
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 3,116,222 | $236,957,509 | $295,916,441 | +$58,958,932 | +24.88% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,122,380 | $161,385,775 | $201,541,205 | +$40,155,430 | +24.88% | |
| American Century Companies Inc | 0.06% | 1,775,158 | $134,983,030 | $168,569,004 | +$33,585,974 | +24.88% | |
| Gates Capital Management, Inc. | 4.27% | 1,710,192 | $130,043,000 | $162,399,832 | +$32,356,832 | +24.88% | |
| First Trust Capital Management L.P. | 6.08% | 1,333,296 | $126,329,796 | $126,609,788 | +$279,992 | +0.22% | |
| Vanguard Capital Management Llc | 0.00% | 1,524,252 | $115,904,122 | $144,742,970 | +$28,838,848 | +24.88% | |
| Geode Capital Management, Llc | 0.00% | 895,843 | $84,897,384 | $85,069,251 | +$171,867 | +0.20% | |
| State Street Corp | 0.00% | 906,421 | $68,924,253 | $86,073,738 | +$17,149,485 | +24.88% | |
| Dimensional Fund Advisors Lp | 0.01% | 722,951 | $68,499,774 | $68,651,427 | +$151,653 | +0.22% | |
| Earnest Partners Llc | 0.21% | 772,294 | $58,725,236 | $73,337,038 | +$14,611,802 | +24.88% | |
| Hill City Capital, Lp | 1.29% | 724,106 | $55,061,020 | $68,761,106 | +$13,700,086 | +24.88% | |
| T. Rowe Price Investment Management, Inc. | 0.03% | 647,881 | $49,265,000 | $61,522,780 | +$12,257,780 | +24.88% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.05% | 575,607 | $43,768,441 | $54,659,641 | +$10,891,200 | +24.88% | |
| Harding Loevner Lp | 0.41% | 567,192 | $43,126,800 | $53,860,552 | +$10,733,752 | +24.89% | |
| First Trust Advisors Lp | 0.02% | 533,063 | $40,534,110 | $50,619,662 | +$10,085,552 | +24.88% | |
| Jacobs Levy Equity Management, Inc | 0.14% | 519,275 | $39,485,671 | $49,310,354 | +$9,824,683 | +24.88% | |
| Jpmorgan Chase & Co | 0.00% | 520,864 | $39,241,076 | $49,461,245 | +$10,220,169 | +26.04% | |
| Irenic Capital Management Lp | 2.78% | 507,613 | $38,598,893 | $48,202,930 | +$9,604,037 | +24.88% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 482,239 | $36,669,454 | $45,793,415 | +$9,123,961 | +24.88% | |
| Charles Schwab Investment Management Inc | 0.00% | 453,964 | $34,519,423 | $43,108,421 | +$8,588,998 | +24.88% | |
| Bank Of America Corp | 0.00% | 438,802 | $33,366,504 | $41,668,638 | +$8,302,134 | +24.88% | |
| Two Sigma Investments, Lp | 0.02% | 402,131 | $30,578,041 | $38,186,360 | +$7,608,319 | +24.88% | |
| Gendell Jeffrey L | 0.28% | 400,214 | $30,432,272 | $38,004,321 | +$7,572,049 | +24.88% | |
| London Co Of Virginia | 0.17% | 386,827 | $29,414,538 | $36,733,092 | +$7,318,554 | +24.88% | |
| Morgan Stanley | 0.00% | 378,566 | $28,786,236 | $35,948,627 | +$7,162,391 | +24.88% | |
| Victory Capital Management Inc | 0.02% | 371,385 | $28,240,116 | $35,266,720 | +$7,026,604 | +24.88% | |
| Boston Partners | 0.02% | 367,806 | $27,871,270 | $34,926,858 | +$7,055,588 | +25.31% | |
| New York State Common Retirement Fund | 0.03% | 341,215 | $25,945,989 | $32,401,776 | +$6,455,787 | +24.88% | |
| Northern Trust Corp | 0.00% | 335,441 | $25,506,933 | $31,853,477 | +$6,346,544 | +24.88% | |
| Bank Of New York Mellon Corp | 0.00% | 246,992 | $23,402,498 | $23,454,360 | +$51,862 | +0.22% | |
| Goldman Sachs Group Inc | 0.00% | 288,586 | $21,944,094 | $27,404,127 | +$5,460,033 | +24.88% | |
| Bridgeway Capital Management, Llc | 0.34% | 252,429 | $19,194,701 | $23,970,658 | +$4,775,957 | +24.88% | |
| Sei Investments Co | 0.02% | 244,346 | $18,580,060 | $23,203,096 | +$4,623,036 | +24.88% | |
| Nuveen, Llc | 0.00% | 238,992 | $18,172,929 | $22,694,680 | +$4,521,751 | +24.88% | |
| Vanguard Fiduciary Trust Co | 0.00% | 223,986 | $17,031,895 | $21,269,711 | +$4,237,816 | +24.88% | |
| Empowered Funds, Llc | 0.08% | 204,012 | $15,513,072 | $19,372,980 | +$3,859,908 | +24.88% | |
| Pdt Partners, Llc | 0.76% | 191,253 | $14,542,878 | $18,161,385 | +$3,618,507 | +24.88% | |
| Federated Hermes, Inc. | 0.02% | 184,141 | $14,002,101 | $17,486,029 | +$3,483,928 | +24.88% | |
| Allianz Asset Management Gmbh | 0.01% | 181,838 | $13,826,962 | $17,267,336 | +$3,440,374 | +24.88% | |
| Qube Research & Technologies Ltd | 0.02% | 178,249 | $13,554,054 | $16,926,525 | +$3,372,471 | +24.88% | |
| Wells Fargo & Company/Mn | 0.00% | 155,867 | $11,852,127 | $14,801,130 | +$2,949,003 | +24.88% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.02% | 150,669 | $11,456,871 | $14,307,528 | +$2,850,657 | +24.88% | |
| D. E. Shaw & Co., Inc. | 0.01% | 145,448 | $11,059,866 | $13,811,742 | +$2,751,876 | +24.88% | |
| Canyon Capital Advisors Llc | 1.20% | 139,700 | $10,622,788 | $13,265,912 | +$2,643,124 | +24.88% | |
| Hotchkis & Wiley Capital Management Llc | 0.03% | 139,446 | $10,603,474 | $13,241,792 | +$2,638,318 | +24.88% | |
| Transmarket Holdings Lp | 5.61% | 106,084 | $10,051,459 | $10,073,737 | +$22,278 | +0.22% | |
| Natixis | 0.04% | 105,742 | $10,019,055 | $10,041,260 | +$22,205 | +0.22% | |
| Dnb Asset Management As | 0.03% | 130,833 | $9,948,541 | $12,423,902 | +$2,475,361 | +24.88% | |
| Chicago Capital Management, Llc | 8.54% | 130,451 | $9,426,393 | $12,387,627 | +$2,961,234 | +31.41% | |
| Trexquant Investment Lp | 0.05% | 113,413 | $8,623,925 | $10,769,698 | +$2,145,773 | +24.88% |
Frequently asked questions about ATKR
Who are the largest institutional holders of ATKR?
The largest institutional holders of ATKR reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Portfolio Management Llc, American Century Companies Inc, Gates Capital Management, Inc., and First Trust Capital Management L.P.. InsiderSet ranks institutional holders by their latest reported ATKR position.
What is ATKR institutional ownership?
This page tracks ATKR positions reported by institutional investment managers through SEC Form 13F. ATKORE INC (ATKR) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATKR?
InsiderSet currently tracks 310 institutional managers reporting ATKR holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATKR shareholders.
How much ATKR stock do institutions own?
Institutional investment managers disclosed approximately $2.49B in ATKR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATKR institutional ownership last updated?
The latest ATKR institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATKR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATKR position after the reporting date.
Are institutions buying or selling ATKR?
Institutional buying and selling can be analyzed by comparing ATKR positions across consecutive 13F reporting periods. InsiderSet's ATKR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATKR ownership changes.
How has ATKR institutional ownership changed over time?
InsiderSet tracks ATKR institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.