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Disclosery

ATKR ATKORE INC

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COMMON STOCK (common), issuer CIK 1666138

315 managers (326 13F filers) reported a position in ATKR shares at 2026-06-30, 32,895,316 shares in all. 62 filers opened a position and 39 filers sold out during the quarter.

Managers
315
13F filers
326
New
62
Added
118
Reduced
87
Sold out
39
Shares held by filers
32,895,316

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2026

Filers in the available 13F reports with a share position at 2026-06-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
VANGUARD GROUP INCgroup of 7 filers holding3,925,585$299M+34,711Timeline
BlackRock, Inc.in group BlackRock, Inc.3,116,222$237M<0.01%+489,43113F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,775,158$135M0.06%+336,04213F-HRTimelineGroup
Gates Capital Management, Inc.in group Gates Capital Management, Inc.1,710,192$130M4.27%-975,52613F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,299,786$98.8M0.02%+71,79513F-HRTimelineGroup
LSV ASSET MANAGEMENT1,093,590$83.2M0.15%+41,72913F-HRTimeline
STATE STREET CORPin group STATE STREET CORP906,421$68.9M<0.01%+71,26513F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC902,486$68.6M<0.01%+47,75513F-HRTimelineGroup
EARNEST PARTNERS LLC772,294$58.7M0.21%-5,61113F-HRTimeline
Hill City Capital, LP724,106$55.1M1.29%-4,10013F-HR/ATimeline
T. Rowe Price Investment Management, In…647,881$49.3M0.03%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…575,607$43.8M0.05%+42,61513F-HRTimelineGroup
Harding Loevner LP567,192$43.1M0.41%-137,67013F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP533,063$40.5M0.02%-693,77713F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC519,275$39.5M0.14%+175,98613F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO520,864$39.2M<0.01%+270,55613F-HRTimelineGroup
Irenic Capital Management LP507,613$38.6M2.78%+493,63613F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …482,239$36.7M0.02%-215,89513F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co453,964$34.5M<0.01%+36,32013F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/438,802$33.4M<0.01%-23,47613F-HRTimelineGroup
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP402,131$30.6M0.02%+49,13113F-HRTimelineGroup
GENDELL JEFFREY Lin group GENDELL JEFFREY L400,214$30.4M0.28%013F-HRTimelineGroup
LONDON CO OF VIRGINIA386,827$29.4M0.17%+9,20413F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY378,566$28.8M<0.01%+40,26613F-HRTimelineGroup
Oslo Pensjonsforsikring AS377,000$28.7M3.3%013F-HRTimeline
VICTORY CAPITAL MANAGEMENT INC371,385$28.2M0.02%-7,88913F-HRTimeline
Boston Partnersin group Boston Trust Walden Corp367,806$27.9M0.02%new13F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND341,215$25.9M0.03%-2,30013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP335,441$25.5M<0.01%+14,07813F-HRTimelineGroup
Swedbank ABin group Swedbank AB296,206$22.5M0.02%013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC288,586$21.9M<0.01%+12,49413F-HRTimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC252,429$19.2M0.34%+8,24613F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp247,645$18.8M<0.01%+11,72613F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO244,346$18.6M0.02%+35,89213F-HRTimelineGroup
Nuveen, LLCin group TIAA238,992$18.2M<0.01%+45,07913F-HRTimelineGroup
Empowered Funds, LLC204,012$15.5M0.08%+70,49613F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC197,509$15M<0.01%+38,71613F-HRTimelineGroup
PDT Partners, LLC191,253$14.5M0.76%+75,08513F-HRTimeline
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.184,141$14M0.02%+24,51313F-HRTimelineGroup
Allianz SEgroup of 2 filers holding181,838$13.8M-2,372Timeline
Qube Research & Technologies Ltd178,249$13.6M0.02%+31,20413F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN155,867$11.9M<0.01%-22,18013F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding153,840$11.7M-29,662Timeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…150,669$11.5M0.02%+24,86913F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.145,448$11.1M0.01%+84,17813F-HRTimelineGroup
CANYON CAPITAL ADVISORS LLC139,700$10.6M1.2%-165,30013F-HRTimeline
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC139,446$10.6M0.03%-14,04013F-HRTimeline
DNB Asset Management ASin group DNB Asset Management AS130,833$9.95M0.03%-35,74913F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…125,124$9.51M0.01%+30,81513F-HRTimelineGroup
Trexquant Investment LP113,413$8.62M0.05%new13F-HRTimeline
CANADA PENSION PLAN INVESTMENT BOARD102,900$7.82M<0.01%-144,26213F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …106,066$7.68M0.01%+29,23613F-HRTimelineGroup
Man Group plcin group Man Group plc98,582$7.5M0.01%-51,74813F-HRTimelineGroup
Aventail Capital Group, LP94,600$7.19M0.41%new13F-HRTimeline
Woodline Partners LP94,232$7.17M0.02%-7,84913F-HRTimeline
Invesco Ltd.in group Invesco Ltd.93,910$7.14M<0.01%-43913F-HRTimelineGroup
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …89,807$6.75M0.01%-3,67613F-HRTimelineGroup
TOWLE & CO85,793$6.52M2.21%new13F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS83,548$6.35M<0.01%+7,32013F-HRTimelineGroup
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …74,805$5.69M0.01%+1,34913F-HRTimelineGroup
KESTREL INVESTMENT MANAGEMENT CORP74,150$5.64M3.07%013F-HRTimeline
Rock Point Advisors, LLC71,688$5.45M1.33%-13,99713F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC70,553$5.36M<0.01%+3913F-HRTimelineGroup
MARTINGALE ASSET MANAGEMENT L P70,155$5.33M0.13%+41713F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC68,185$5.18M<0.01%+19,49613F-HRTimelineGroup
Swiss National Bank67,700$5.15M<0.01%+1,30013F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC66,747$5.08M<0.01%-5,95413F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC65,330$4.97M0.01%+1,14013F-HRTimelineGroup
Caisse de depot et placement du Quebec63,513$4.83M0.01%+39,01313F-HRTimeline
DEAN INVESTMENT ASSOCIATES, LLCgroup of 2 filers holding59,785$4.55M+46,324Timeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC57,742$4.39M<0.01%-3,07913F-HRTimelineGroup
Engineers Gate Manager LP57,071$4.34M0.06%+50,14113F-HRTimeline
Edgestream Partners, L.P.56,665$4.31M0.13%new13F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC51,660$3.93M0.01%+19,72913F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd50,831$3.87M0.05%+45,02113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC50,520$3.84M<0.01%-40613F-HRTimelineGroup
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.49,751$3.78M0.01%new13F-HRTimelineGroup
Defiance ETFs, LLC51,660$3.74M0.05%+29,16613F-HRTimeline
RHUMBLINE ADVISERS46,500$3.54M<0.01%+2,88113F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/45,457$3.46M<0.01%+6,85013F-HRTimeline
NOMURA ASSET MANAGEMENT CO LTDgroup of 2 filers holding45,220$3.44M-29,782Timeline
ALGERT GLOBAL LLC43,510$3.31M0.04%new13F-HRTimeline
DENALI ADVISORS LLC42,900$3.26M0.33%-12,10013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…42,459$3.23M0.05%+11,89813F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC41,658$3.17M0.01%-6,93513F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …39,010$2.97M0.03%-23113F-HRTimelineGroup
CSM Advisors, LLC38,880$2.96M0.06%+2,65113F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…38,455$2.92M<0.01%-1,24813F-HR/ATimeline
ISTHMUS PARTNERS, LLC38,120$2.9M0.28%+1,30613F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\36,324$2.76M<0.01%-119,79413F-HRTimelineGroup
Ausbil Investment Management Ltd35,147$2.55M1.15%+24,14913F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc33,144$2.52M<0.01%+1,28613F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC29,846$2.25M<0.01%+11,19013F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…28,858$2.19M<0.01%-11,57613F-HRTimelineGroup
Linden Thomas Advisory Services, LLC28,856$2.19M0.18%+3,17913F-HRTimeline
ALLIANCEBERNSTEIN L.P.36,560$2.15M<0.01%+1,50013F-HRTimeline
CenterBook Partners LP28,144$2.14M0.11%new13F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management28,014$2.13M<0.01%-18,64913F-HRTimelineGroup
JB CAPITAL PARTNERS LP25,000$1.9M0.29%013F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC24,784$1.88M<0.01%+20,69213F-HRTimelineGroup
Creative Planningin group Creative Planning23,957$1.82M<0.01%+5,42913F-HRTimelineGroup
Twelve Points Wealth Management LLC23,955$1.82M0.36%-52813F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC23,860$1.81M<0.01%-15,36613F-HRTimelineGroup
ExodusPoint Capital Management, LP23,815$1.81M0.02%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD23,573$1.79M<0.01%+1,89813F-HRTimeline
Jupiter Topco LLCin group Janus Henderson23,467$1.78M<0.01%13F-HRTimelineGroup
CAXTON ASSOCIATES LLP23,431$1.78M0.03%-1,44513F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…23,420$1.78M0.01%013F-HRTimeline
EASTERLY INVESTMENT PARTNERS LLC23,110$1.76M0.09%-23013F-HRTimeline
Old West Investment Management, LLC22,737$1.73M0.18%+9,72013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC22,191$1.69M<0.01%+7,59213F-HRTimelineGroup
Bridgewater Associates, LP21,790$1.66M0.01%new13F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources21,128$1.61M<0.01%-8,65913F-HRTimelineGroup
KLP KAPITALFORVALTNING AS21,100$1.6M0.01%013F-HRTimeline
Aviance Capital Partners, LLC20,672$1.57M0.16%-12213F-HRTimeline
FMR LLCin group FMR LLC20,117$1.53M<0.01%+10,08713F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…19,963$1.52M0.01%+1,33713F-HRTimelineGroup
WINCAP FINANCIAL LLC19,855$1.51M0.82%+2,33613F-HRTimeline
Kerrisdale Advisers, LLC19,844$1.51M0.38%-8,23013F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC19,341$1.47M0.01%+8,51313F-HRTimelineGroup
Quadrature Capital Ltdin group Quadrature Capital Ltd18,787$1.43M0.01%+12,61313F-HRTimelineGroup
Walleye Capital LLCgroup of 2 filers holding17,708$1.35M+11,638Timeline
TWINBEECH CAPITAL LP17,400$1.32M0.24%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …17,293$1.31M<0.01%+1,46313F-HRTimelineGroup
DekaBank Deutsche Girozentrale22,580$1.31M<0.01%013F-HRTimeline
Holocene Advisors, LP16,131$1.23M<0.01%-4,52813F-HRTimeline
Rose Capital Advisors LLC14,811$1.13M0.6%13F-HRTimeline
STRS OHIO14,700$1.12M<0.01%new13F-HRTimeline
Round Hill Asset Management13,967$1.06M0.67%013F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC13,876$1.06M<0.01%+81413F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA13,844$1.05M<0.01%+55513F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…13,708$1.04M<0.01%-20,00413F-HRTimelineGroup
Quantinno Capital Management LP13,409$1.02M<0.01%+7,11813F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.13,400$1.02M0.01%-3,33713F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC13,257$1.01M<0.01%new13F-HRTimelineGroup
Legato Capital Management LLC13,117$997K0.08%new13F-HRTimeline
WCM INVESTMENT MANAGEMENT, LLC13,232$994K<0.01%new13F-HRTimeline
CAPTRUST FINANCIAL ADVISORS13,008$989K<0.01%-29613F-HRTimeline
Mutual Advisors, LLC12,967$986K0.02%new13F-HRTimeline
ARISTEIA CAPITAL, L.L.C.12,659$963K0.02%-1,50813F-HRTimeline
Morningstar Investment Management LLCin group Morningstar Investment Manage…16,130$950K0.06%013F-HRTimelineGroup
Jain Global LLC12,293$935K0.01%new13F-HRTimeline
SEB Asset Management AB11,545$878K<0.01%013F-HRTimeline
ARGA Investment Management, LP11,401$867K0.02%013F-HRTimeline
Unison Advisors LLC11,348$863K0.06%+4713F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …10,953$833K<0.01%+10,28513F-HRTimelineGroup
Diversified Investment Strategies, LLC10,950$833K0.54%+95013F-HRTimeline
LPL Financial LLC10,578$804K<0.01%-5,78813F-HRTimeline
DRW Securities, LLC10,497$798K0.05%-6,31113F-HRTimeline
Police & Firemen's Retirement System of…10,101$768K0.01%+1,17713F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…9,931$755K<0.01%013F-HRTimeline
Atria Investments, Inc9,547$726K0.01%+5113F-HRTimeline
Lakewood Asset Management LLC9,501$722K0.4%-18913F-HRTimeline
Schonfeld Strategic Advisors LLC9,387$714K<0.01%new13F-HRTimeline
SummerHaven Investment Management, LLC9,330$709K0.38%013F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM9,313$708K<0.01%+3413F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP9,170$697K0.04%+4,63113F-HRTimeline
Foguth Wealth Management, LLC.9,477$696K0.08%013F-HRTimeline
HighTower Advisors, LLC8,903$677K<0.01%-13,35313F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC8,900$677K0.01%013F-HRTimelineGroup
Entropy Technologies, LP8,833$672K0.03%+50213F-HRTimeline
Y-Intercept (Hong Kong) Ltd8,817$670K0.01%new13F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC8,447$642K0.01%-4013F-HRTimeline
Chou Associates Management Inc.8,400$639K0.29%013F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP8,204$624K0.03%new13F-HRTimeline
Aquatic Capital Management LLC8,031$611K0.02%+5,99013F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.7,874$599K0.03%+4,37513F-HRTimelineGroup
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP7,561$575K<0.01%-16213F-HRTimelineGroup
CastleKnight Management LP7,500$570K0.02%-34,70013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…7,455$567K<0.01%013F-HRTimeline
Mariner, LLCin group Mariner, LLC7,450$567K<0.01%new13F-HRTimelineGroup
TD Asset Management Inc6,782$516K<0.01%new13F-HRTimeline
BAILARD, INC.6,700$509K0.01%new13F-HRTimeline
Grantham, Mayo, Van Otterloo & Co. LLC6,671$507K<0.01%-18513F-HRTimeline
Mitsubishi UFJ Trust & Banking Corpgroup of 2 filers holding6,577$500K-18,765Timeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC6,575$500K<0.01%+77113F-HRTimelineGroup
&PARTNERS6,566$500K<0.01%+17213F-HRTimeline
Voleon Capital Management LP6,163$469K0.01%-3,87313F-HRTimeline
Ewing Morris & Co. Investment Partners …6,000$456K0.24%new13F-HRTimeline
Meixler Investment Management, Ltd.5,947$452K0.25%+513F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…5,814$442K<0.01%+22813F-HRTimelineGroup
SHUFRO ROSE & CO LLC5,800$441K0.03%013F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC5,676$432K<0.01%-19,78413F-HRTimelineGroup
INCEPTIONR LLC5,604$426K0.1%+1,86713F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…5,216$397K<0.01%-59513F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC5,117$389K0.03%new13F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co5,068$385K<0.01%+63513F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP4,896$372K<0.01%new13F-HRTimelineGroup
ProShare Advisors LLC4,486$341K<0.01%-39413F-HRTimeline
GAMCO INVESTORS, INC. ET ALin group GAMCO Investors (Gabelli)4,484$341K<0.01%013F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS4,451$338K<0.01%+1,02213F-HRTimeline
Baron Wealth Management LLC4,288$326K0.08%+58113F-HRTimeline
SG Americas Securities, LLC4,124$314K<0.01%-35,07113F-HRTimeline
EP Wealth Advisors, LLC4,108$312K<0.01%new13F-HRTimeline
FOX RUN MANAGEMENT, L.L.C.3,993$304K0.05%-7213F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC3,973$302K0.01%new13F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC3,944$300K<0.01%-43513F-HRTimelineGroup
Marex Group Ltdin group Marex Group Ltd3,900$297K<0.01%new13F-HRTimelineGroup
Gotham Asset Management, LLC3,894$296K<0.01%-79013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,831$291K<0.01%013F-HRTimeline