ATKORE INC (ATKR) Top 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 March 31, 2026. The institutional investors covered on this page collectively reported approximately $1.82B in ATKR holdings during the latest filing period.
Gates Capital Management, Inc. is currently the largest disclosed institutional shareholder of ATKR tracked by InsiderSet, reporting ownership valued at approximately $158.22M in its March 31, 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 $206.37M, representing an estimated gain of +30.44% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 50% of the total disclosed ATKR value among the investors covered in this analysis. Major shareholders include Gates Capital Management, Inc., Blackrock, Inc., Vanguard Portfolio Management Llc, 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
298
Total Reported Value
$1.82B
Largest Holder
Gates Capital Management, Inc.
Largest Position
$158.22M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
104
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Gates Capital Management, Inc. | 5.46% | 2,685,718 | $158,215,647 | $206,370,571 | +$48,154,924 | +30.44% | |
| Blackrock, Inc. | 0.00% | 2,626,791 | $154,744,274 | $201,842,620 | +$47,098,346 | +30.44% | |
| Vanguard Portfolio Management Llc | 0.01% | 2,090,469 | $123,149,529 | $160,631,638 | +$37,482,109 | +30.44% | |
| Vanguard Capital Management Llc | 0.00% | 1,515,110 | $89,255,130 | $116,421,052 | +$27,165,922 | +30.44% | |
| American Century Companies Inc | 0.04% | 1,439,116 | $84,778,335 | $110,581,673 | +$25,803,338 | +30.44% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,227,991 | $72,340,574 | $94,358,828 | +$22,018,254 | +30.44% | |
| First Trust Advisors Lp | 0.05% | 1,226,840 | $72,273,144 | $94,270,386 | +$21,997,242 | +30.44% | |
| Coliseum Capital Management, Llc | 4.57% | 947,070 | $55,791,894 | $72,772,859 | +$16,980,965 | +30.44% | |
| Geode Capital Management, Llc | 0.00% | 854,731 | $50,361,921 | $65,677,530 | +$15,315,609 | +30.41% | |
| State Street Corp | 0.00% | 835,156 | $49,199,040 | $64,173,387 | +$14,974,347 | +30.44% | |
| Earnest Partners Llc | 0.19% | 777,905 | $45,826,384 | $59,774,220 | +$13,947,836 | +30.44% | |
| Hill City Capital, Lp | 1.53% | 728,206 | $42,898,615 | $55,955,349 | +$13,056,734 | +30.44% | |
| Harding Loevner Lp | 0.43% | 704,862 | $41,535,636 | $54,161,596 | +$12,625,960 | +30.40% | |
| Arrowstreet Capital, Limited Partnership | 0.02% | 698,134 | $41,127,074 | $53,644,617 | +$12,517,543 | +30.44% | |
| Mirae Asset Global Etfs Holdings Ltd. | 0.04% | 532,992 | $31,398,019 | $40,955,105 | +$9,557,086 | +30.44% | |
| Bank Of America Corp | 0.00% | 462,278 | $27,232,797 | $35,521,442 | +$8,288,645 | +30.44% | |
| Charles Schwab Investment Management Inc | 0.00% | 417,644 | $24,603,408 | $32,091,765 | +$7,488,357 | +30.44% | |
| Gendell Jeffrey L | 0.32% | 400,214 | $23,576,606 | $30,752,444 | +$7,175,838 | +30.44% | |
| Victory Capital Management Inc | 0.01% | 379,274 | $22,343,031 | $29,143,414 | +$6,800,383 | +30.44% | |
| London Co Of Virginia | 0.14% | 377,623 | $22,245,906 | $29,016,551 | +$6,770,645 | +30.44% | |
| Oslo Pensjonsforsikring As | 3.46% | 377,000 | $22,209,070 | $28,968,680 | +$6,759,610 | +30.44% | |
| Two Sigma Investments, Lp | 0.02% | 353,000 | $20,795,230 | $27,124,520 | +$6,329,290 | +30.44% | |
| New York State Common Retirement Fund | 0.03% | 343,515 | $20,236,469 | $26,395,693 | +$6,159,224 | +30.44% | |
| Jacobs Levy Equity Management, Inc | 0.09% | 343,289 | $20,223,155 | $26,378,327 | +$6,155,172 | +30.44% | |
| Morgan Stanley | 0.00% | 338,300 | $19,929,360 | $25,994,972 | +$6,065,612 | +30.44% | |
| Northern Trust Corp | 0.00% | 321,363 | $18,931,495 | $24,693,533 | +$5,762,038 | +30.44% | |
| Canyon Capital Advisors Llc | 2.33% | 305,000 | $17,967,550 | $23,436,200 | +$5,468,650 | +30.44% | |
| Swedbank Ab | 0.02% | 296,206 | $17,449,495 | $22,760,469 | +$5,310,974 | +30.44% | |
| Goldman Sachs Group Inc | 0.00% | 276,092 | $16,264,586 | $21,214,909 | +$4,950,323 | +30.44% | |
| Canada Pension Plan Investment Board | 0.01% | 247,162 | $14,560,313 | $18,991,928 | +$4,431,615 | +30.44% | |
| Bridgeway Capital Management, Llc | 0.29% | 244,183 | $14,384,821 | $18,763,022 | +$4,378,201 | +30.44% | |
| Bank Of New York Mellon Corp | 0.00% | 235,919 | $13,898,004 | $18,128,016 | +$4,230,012 | +30.44% | |
| Vanguard Fiduciary Trust Co | 0.00% | 218,268 | $12,858,168 | $16,771,713 | +$3,913,545 | +30.44% | |
| Sei Investments Co | 0.01% | 208,454 | $12,280,049 | $16,017,605 | +$3,737,556 | +30.44% | |
| Nuveen, Llc | 0.00% | 193,913 | $11,423,415 | $14,900,275 | +$3,476,860 | +30.44% | |
| Wells Fargo & Company/Mn | 0.00% | 178,047 | $10,488,749 | $13,681,131 | +$3,192,382 | +30.44% | |
| Dnb Asset Management As | 0.03% | 166,582 | $9,813,346 | $12,800,161 | +$2,986,815 | +30.44% | |
| Federated Hermes, Inc. | 0.02% | 159,628 | $9,403,701 | $12,265,816 | +$2,862,115 | +30.44% | |
| Barclays Plc | 0.00% | 158,793 | $9,354,497 | $12,201,654 | +$2,847,157 | +30.44% | |
| Deutsche Bank Ag\ | 0.00% | 156,118 | $9,196,911 | $11,996,107 | +$2,799,196 | +30.44% | |
| Hotchkis & Wiley Capital Management Llc | 0.03% | 153,486 | $9,041,860 | $11,793,864 | +$2,752,004 | +30.44% | |
| Man Group Plc | 0.02% | 150,330 | $8,855,940 | $11,551,357 | +$2,695,417 | +30.44% | |
| Qube Research & Technologies Ltd | 0.01% | 147,045 | $8,662,421 | $11,298,938 | +$2,636,517 | +30.44% | |
| Empowered Funds, Llc | 0.05% | 133,516 | $7,865,428 | $10,259,369 | +$2,393,941 | +30.44% | |
| Healthcare Of Ontario Pension Plan Trust Fund | 0.01% | 125,800 | $7,410,878 | $9,666,472 | +$2,255,594 | +30.44% | |
| Allianz Asset Management Gmbh | 0.01% | 121,937 | $7,183,309 | $9,369,639 | +$2,186,330 | +30.44% | |
| Pdt Partners, Llc | 0.41% | 116,168 | $6,843,457 | $8,926,349 | +$2,082,892 | +30.44% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.00% | 106,270 | $6,260,365 | $8,165,787 | +$1,905,422 | +30.44% | |
| Woodline Partners Lp | 0.02% | 102,081 | $6,013,592 | $7,843,904 | +$1,830,312 | +30.44% | |
| Invesco Ltd. | 0.00% | 94,349 | $5,558,100 | $7,249,777 | +$1,691,677 | +30.44% |
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.