ATKORE INC (ATKR) Institutional Shareholders
ATKORE INC (ATKR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $2.49B in ATKR holdings during the latest filing period.
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 $294.48M, representing an estimated gain of +24.28% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 46% 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
317
Total Reported Value
$2.49B
Largest Holder
Blackrock, Inc.
Largest Position
$236.96M
Insider Transactions (90d)
17
Latest Filing Quarter
Q2 2026
New Institutional Positions
63
Funds Exiting Positions
0
| 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 | $294,482,979 | +$57,525,470 | +24.28% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,122,380 | $161,385,775 | $200,564,910 | +$39,179,135 | +24.28% | |
| American Century Companies Inc | 0.06% | 1,775,158 | $134,983,030 | $167,752,431 | +$32,769,401 | +24.28% | |
| Gates Capital Management, Inc. | 4.27% | 1,710,192 | $130,043,000 | $161,613,144 | +$31,570,144 | +24.28% | |
| Vanguard Capital Management Llc | 0.00% | 1,524,252 | $115,904,122 | $144,041,814 | +$28,137,692 | +24.28% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,299,786 | $98,833,585 | $122,829,777 | +$23,996,192 | +24.28% | |
| Lsv Asset Management | 0.15% | 1,093,590 | $83,157,000 | $103,344,255 | +$20,187,255 | +24.28% | |
| State Street Corp | 0.00% | 906,421 | $68,924,253 | $85,656,785 | +$16,732,532 | +24.28% | |
| Geode Capital Management, Llc | 0.00% | 902,486 | $68,638,673 | $85,284,927 | +$16,646,254 | +24.25% | |
| Earnest Partners Llc | 0.21% | 772,294 | $58,725,236 | $72,981,783 | +$14,256,547 | +24.28% | |
| Hill City Capital, Lp | 1.29% | 724,106 | $55,061,020 | $68,428,017 | +$13,366,997 | +24.28% | |
| T. Rowe Price Investment Management, Inc. | 0.03% | 647,881 | $49,265,000 | $61,224,755 | +$11,959,755 | +24.28% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.05% | 575,607 | $43,768,441 | $54,394,862 | +$10,626,421 | +24.28% | |
| Harding Loevner Lp | 0.41% | 567,192 | $43,126,800 | $53,599,644 | +$10,472,844 | +24.28% | |
| First Trust Advisors Lp | 0.02% | 533,063 | $40,534,110 | $50,374,454 | +$9,840,344 | +24.28% | |
| Jacobs Levy Equity Management, Inc | 0.14% | 519,275 | $39,485,671 | $49,071,488 | +$9,585,817 | +24.28% | |
| Jpmorgan Chase & Co | 0.00% | 520,864 | $39,241,076 | $49,221,648 | +$9,980,572 | +25.43% | |
| Irenic Capital Management Lp | 2.78% | 507,613 | $38,598,893 | $47,969,429 | +$9,370,536 | +24.28% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 482,239 | $36,669,454 | $45,571,586 | +$8,902,132 | +24.28% | |
| Charles Schwab Investment Management Inc | 0.00% | 453,964 | $34,519,423 | $42,899,598 | +$8,380,175 | +24.28% | |
| Bank Of America Corp | 0.00% | 438,802 | $33,366,504 | $41,466,789 | +$8,100,285 | +24.28% | |
| Two Sigma Investments, Lp | 0.02% | 402,131 | $30,578,041 | $38,001,380 | +$7,423,339 | +24.28% | |
| Gendell Jeffrey L | 0.28% | 400,214 | $30,432,272 | $37,820,223 | +$7,387,951 | +24.28% | |
| London Co Of Virginia | 0.17% | 386,827 | $29,414,538 | $36,555,152 | +$7,140,614 | +24.28% | |
| Morgan Stanley | 0.00% | 378,566 | $28,786,236 | $35,774,487 | +$6,988,251 | +24.28% | |
| Oslo Pensjonsforsikring As | 3.30% | 377,000 | $28,667,080 | $35,626,500 | +$6,959,420 | +24.28% | |
| Victory Capital Management Inc | 0.02% | 371,385 | $28,240,116 | $35,095,883 | +$6,855,767 | +24.28% | |
| Boston Partners | 0.02% | 367,806 | $27,871,270 | $34,757,667 | +$6,886,397 | +24.71% | |
| New York State Common Retirement Fund | 0.03% | 341,215 | $25,945,989 | $32,244,818 | +$6,298,829 | +24.28% | |
| Northern Trust Corp | 0.00% | 335,441 | $25,506,933 | $31,699,175 | +$6,192,242 | +24.28% | |
| Swedbank Ab | 0.02% | 296,206 | $22,523,504 | $27,991,467 | +$5,467,963 | +24.28% | |
| Goldman Sachs Group Inc | 0.00% | 288,586 | $21,944,094 | $27,271,377 | +$5,327,283 | +24.28% | |
| Bridgeway Capital Management, Llc | 0.34% | 252,429 | $19,194,701 | $23,854,541 | +$4,659,840 | +24.28% | |
| Bank Of New York Mellon Corp | 0.00% | 247,645 | $18,830,913 | $23,402,453 | +$4,571,540 | +24.28% | |
| Sei Investments Co | 0.02% | 244,346 | $18,580,060 | $23,090,697 | +$4,510,637 | +24.28% | |
| Nuveen, Llc | 0.00% | 238,992 | $18,172,929 | $22,584,744 | +$4,411,815 | +24.28% | |
| Vanguard Fiduciary Trust Co | 0.00% | 223,986 | $17,031,895 | $21,166,677 | +$4,134,782 | +24.28% | |
| Empowered Funds, Llc | 0.08% | 204,012 | $15,513,072 | $19,279,134 | +$3,766,062 | +24.28% | |
| Barclays Plc | 0.00% | 197,509 | $15,018,583 | $18,664,601 | +$3,646,018 | +24.28% | |
| Pdt Partners, Llc | 0.76% | 191,253 | $14,542,878 | $18,073,409 | +$3,530,531 | +24.28% | |
| Federated Hermes, Inc. | 0.02% | 184,141 | $14,002,101 | $17,401,325 | +$3,399,224 | +24.28% | |
| Allianz Asset Management Gmbh | 0.01% | 181,838 | $13,826,962 | $17,183,691 | +$3,356,729 | +24.28% | |
| Qube Research & Technologies Ltd | 0.02% | 178,249 | $13,554,054 | $16,844,531 | +$3,290,477 | +24.28% | |
| Wells Fargo & Company/Mn | 0.00% | 155,867 | $11,852,127 | $14,729,432 | +$2,877,305 | +24.28% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.02% | 150,669 | $11,456,871 | $14,238,221 | +$2,781,350 | +24.28% | |
| D. E. Shaw & Co., Inc. | 0.01% | 145,448 | $11,059,866 | $13,744,836 | +$2,684,970 | +24.28% | |
| Canyon Capital Advisors Llc | 1.20% | 139,700 | $10,622,788 | $13,201,650 | +$2,578,862 | +24.28% | |
| Hotchkis & Wiley Capital Management Llc | 0.03% | 139,446 | $10,603,474 | $13,177,647 | +$2,574,173 | +24.28% | |
| Dnb Asset Management As | 0.03% | 130,833 | $9,948,541 | $12,363,719 | +$2,415,178 | +24.28% | |
| Russell Investments Group, Ltd. | 0.01% | 125,124 | $9,514,500 | $11,824,218 | +$2,309,718 | +24.28% |
Frequently asked questions about ATKR
Who owns the most ATKR stock?
The largest holders of ATKR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ATKORE INC (ATKR).
Is ATKR widely held by superinvestors?
Many widely followed stocks like ATKR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ATKR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.