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ATKR · Atkore Inc.

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$71.43 -6.02 (-7.77%) At close · Jul 29
Market Cap
$2.41B
Shares
33.77M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

The Jun 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out.
Holders: 306
Total Value: $1,820,275,008
Total Shares: 30,640,642
Showing 1–100 of 313 holdings by value · page 1 of 4

Institutional Ownership Trend

26 quarters

Superinvestors Holding ATKR

All superinvestors →
Francis Chou $494,844 Joel Greenblatt $275,934 Mario Gabelli $264,152

Holder Concentration

Across 306 13F filers
Top Holder
8.8%
Jun 2023 → Mar 2026 · range 8.8% – 11.4%
of institutional value
Top 5
31.0%
Jun 2023 → Mar 2026 · range 28.1% – 36.5%
of institutional value
Top 10
47.0%
Jun 2023 → Mar 2026 · range 40.0% – 50.3%
of institutional value
HHI
320
Jun 2023 → Mar 2026 · range 289 – 392
Broadly held
Showing 100 of 313
All Common Calls Puts
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Holder Value (USD) % of 13F Shares Open
Mid Gates Capital Management, Inc. $158,215,647 8.69% 2,685,718
Mega BlackRock, Inc. $154,744,248 8.50% 2,626,791
Mega VANGUARD CAPITAL MANAGEMENT LLC $89,255,130 4.90% 1,515,110
Mega AMERICAN CENTURY COMPANIES INC $84,778,323 4.66% 1,439,116
Mega DIMENSIONAL FUND ADVISORS LP $72,340,947 3.97% 1,227,991
Mega FIRST TRUST ADVISORS LP $72,273,144 3.97% 1,226,840
Large LSV ASSET MANAGEMENT $61,965,131 3.40% 1,051,861
Mid Coliseum Capital Management, LLC $55,791,893 3.07% 947,070
Mega GEODE CAPITAL MANAGEMENT, LLC $50,352,202 2.77% 854,731
Mega STATE STREET CORP $49,199,039 2.70% 835,156
Large EARNEST PARTNERS LLC $45,826,383 2.52% 777,905
Mid Hill City Capital, LP $42,898,615 2.36% 728,206
Mid Harding Loevner LP $41,523,420 2.28% 704,862
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP $41,127,073 2.26% 698,134
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $31,398,558 1.72% 532,992
Mega BANK OF AMERICA CORP /DE/ Bank $27,232,794 1.50% 462,278
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $25,945,988 1.43% 341,215
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $24,603,408 1.35% 417,644
Mid GENDELL JEFFREY L $23,576,606 1.30% 400,214
Mega Swedbank AB Bank $22,523,504 1.24% 296,206
Mega VICTORY CAPITAL MANAGEMENT INC $22,343,031 1.23% 379,274
Large LONDON CO OF VIRGINIA $22,245,770 1.22% 377,623
Small Oslo Pensjonsforsikring AS $22,209,070 1.22% 377,000
Mega TWO SIGMA INVESTMENTS, LP $20,795,230 1.14% 353,000
Large JACOBS LEVY EQUITY MANAGEMENT, INC $20,223,154 1.11% 343,289
Mega MORGAN STANLEY $19,929,249 1.09% 338,300
Mega NORTHERN TRUST CORP Bank $18,931,492 1.04% 321,363
Small CANYON CAPITAL ADVISORS LLC $17,967,550 0.99% 305,000
Mega GOLDMAN SACHS GROUP INC $16,264,579 0.89% 276,092
Mega JPMORGAN CHASE & CO $14,745,641 0.81% 250,308
Mega CANADA PENSION PLAN INVESTMENT BOARD Pension $14,560,313 0.80% 247,162
Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC $14,384,820 0.79% 244,183
Mega Bank of New York Mellon Corp Bank $13,897,983 0.76% 235,919
Mega VANGUARD FIDUCIARY TRUST CO Bank $12,858,167 0.71% 218,268
Large SEI INVESTMENTS CO $12,280,024 0.67% 208,454
Mega Nuveen, LLC $11,423,414 0.63% 193,913
Mega WELLS FARGO & COMPANY/MN $10,488,747 0.58% 178,047
Large DNB Asset Management AS $9,813,345 0.54% 166,582
Large FEDERATED HERMES, INC. $9,403,685 0.52% 159,628
Mega BARCLAYS PLC $9,354,494 0.51% 158,793
Mega DEUTSCHE BANK AG\ Bank $9,196,911 0.51% 156,118
Large HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC $9,041,860 0.50% 153,486
Large Man Group plc $8,855,940 0.49% 150,330
Large Qube Research & Technologies Ltd $8,662,420 0.48% 147,045
Large Pacer Advisors, Inc. $8,023,954 0.44% 136,207
Large Empowered Funds, LLC $7,865,426 0.43% 133,516
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $7,410,878 0.41% 125,800
Large Allianz Asset Management GmbH $7,183,308 0.39% 121,937
Mid PDT Partners, LLC $6,843,456 0.38% 116,168
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $6,260,362 0.34% 106,270
Large Woodline Partners LP $6,013,591 0.33% 102,081
Mega Invesco Ltd. $5,558,096 0.31% 94,349
Large Russell Investments Group, Ltd. $5,555,740 0.31% 94,309
Mega NORDEA INVESTMENT MANAGEMENT AB $5,507,082 0.30% 93,483
Small Rock Point Advisors, LLC $5,047,703 0.28% 85,685
Large VOLORIDGE INVESTMENT MANAGEMENT, LLC $5,041,930 0.28% 85,587
Mega UBS Group AG $4,549,736 0.25% 77,232
Large Allspring Global Investments Holdings, LLC $4,526,054 0.25% 76,830
Mega BNP PARIBAS ARBITRAGE, SA $4,490,591 0.25% 76,228
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $4,375,952 0.24% 74,282
Small KESTREL INVESTMENT MANAGEMENT CORP $4,368,176 0.24% 74,150
Large Universal- Beteiligungs- und Servicegesellschaft mbH $4,327,292 0.24% 73,456
Mega ENVESTNET ASSET MANAGEMENT INC $4,282,815 0.24% 72,701
Mega AMERIPRISE FINANCIAL INC $4,153,978 0.23% 70,514
Mid MARTINGALE ASSET MANAGEMENT L P $4,108,265 0.23% 69,738
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,005,880 0.22% 68,000
Mega Swiss National Bank Bank $3,911,624 0.21% 66,400
Mega CITADEL ADVISORS LLC $3,814,009 0.21% 64,743
Large PRUDENTIAL FINANCIAL INC $3,781,432 0.21% 64,190
Mid Allianz SE $3,668,502 0.20% 62,273
Mega D. E. Shaw & Co., Inc. $3,609,415 0.20% 61,270
Mega RAYMOND JAMES FINANCIAL INC $3,582,964 0.20% 60,821
Small DENALI ADVISORS LLC $3,240,050 0.18% 55,000
Small EDENTREE ASSET MANAGEMENT Ltd $3,213,540 0.18% 54,550
Mega AQR CAPITAL MANAGEMENT LLC $3,000,048 0.16% 50,926
Small ISTHMUS PARTNERS, LLC $2,898,644 0.16% 38,120
Mega JANE STREET GROUP, LLC $2,868,268 0.16% 48,689
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,863,026 0.16% 48,600
Large O'SHAUGHNESSY ASSET MANAGEMENT, LLC $2,862,613 0.16% 48,593
Large Balyasny Asset Management L.P. $2,748,917 0.15% 46,663
Small Ausbil Investment Management Ltd $2,672,577 0.15% 35,147
Mega RHUMBLINE ADVISERS $2,569,595 0.14% 43,619
Mid CastleKnight Management LP $2,486,002 0.14% 42,200
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $2,381,966 0.13% 40,434
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $2,338,903 0.13% 39,703
Mid OPPENHEIMER ASSET MANAGEMENT INC. $2,311,687 0.13% 39,241
Mega MILLENNIUM MANAGEMENT LLC $2,310,803 0.13% 39,226
Large SG Americas Securities, LLC Broker-Dealer $2,308,977 0.13% 39,195
Mega PRICE T ROWE ASSOCIATES INC /MD/ $2,274,338 0.12% 38,607
Mid Linden Thomas Advisory Services, LLC $2,194,210 0.12% 28,856
Mid CSM Advisors, LLC $2,134,250 0.12% 36,229
Mega JANE STREET GROUP, LLC $2,091,305 0.11% 35,500
Mega ALLIANCEBERNSTEIN L.P. $2,065,384 0.11% 35,060
Large OMERS ADMINISTRATION Corp $2,058,963 0.11% 34,951
Large Hudson Bay Capital Management LP $2,058,668 0.11% 34,946
Large State of New Jersey Common Pension Fund D Pension $1,985,973 0.11% 33,712
Large LAZARD ASSET MANAGEMENT LLC $1,973,249 0.11% 33,496
Small Crawford Fund Management, LLC $1,944,030 0.11% 33,000
Large Tidal Investments LLC $1,881,054 0.10% 31,931
Mega Legal & General Group Plc $1,876,754 0.10% 31,858
Key facts CIK 1666138 CUSIP 047649108 13F (30d) 54 filings 54 filers Visit website Investor relations

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