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Disclosery

ATKR ATKORE INC

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COMMON STOCK (common), issuer CIK 1666138

294 managers (304 13F filers) reported a position in ATKR shares at 2026-03-31, 32,489,726 shares in all. 41 filers opened a position and 49 filers sold out during the quarter.

Managers
294
13F filers
304
New
41
Added
103
Reduced
95
Sold out
49
Shares held by filers
32,489,726

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, Q1 2026

Filers in the available 13F reports with a share position at 2026-03-31, 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 6 filers holding3,890,874$229MnewTimeline
Gates Capital Management, Inc.in group Gates Capital Management, Inc.2,685,718$158M5.46%-47,42913F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.2,626,791$155M<0.01%+71,08613F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC1,439,116$84.8M0.04%+185,56713F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,227,991$72.3M0.02%+97,51413F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP1,226,840$72.3M0.05%-158,90113F-HRTimelineGroup
LSV ASSET MANAGEMENT1,051,861$62M0.13%+91,41113F-HRTimeline
Coliseum Capital Management, LLC947,070$55.8M4.57%+137,76513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC854,731$50.4M<0.01%+52,51713F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP835,156$49.2M<0.01%+7,63513F-HRTimelineGroup
EARNEST PARTNERS LLC777,905$45.8M0.19%-5,83313F-HRTimeline
Hill City Capital, LP728,206$42.9M1.53%013F-HRTimeline
Harding Loevner LP704,862$41.5M0.43%-27,89113F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …698,134$41.1M0.02%-6,53413F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…532,992$31.4M0.04%+181,70513F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/462,278$27.2M<0.01%+42,59313F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co417,644$24.6M<0.01%+6,67313F-HRTimelineGroup
GENDELL JEFFREY Lin group GENDELL JEFFREY L400,214$23.6M0.32%+13,01313F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC379,274$22.3M0.01%-113,04213F-HRTimeline
LONDON CO OF VIRGINIA377,623$22.2M0.14%-34,10613F-HRTimeline
Oslo Pensjonsforsikring AS377,000$22.2M3.46%013F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP353,000$20.8M0.02%+133,66913F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND343,515$20.2M0.03%-2,31313F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC343,289$20.2M0.09%+19,57013F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY338,300$19.9M<0.01%-58,20713F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP321,363$18.9M<0.01%-42,28613F-HRTimelineGroup
CANYON CAPITAL ADVISORS LLCin group CANYON CAPITAL ADVISORS LLC305,000$18M2.33%new13F-HRTimelineGroup
Swedbank ABin group Swedbank AB296,206$17.4M0.02%013F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC276,092$16.3M<0.01%-107,74913F-HRTimelineGroup
CANADA PENSION PLAN INVESTMENT BOARD247,162$14.6M0.01%-81,93813F-HRTimeline
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO250,308$14.6M<0.01%-146,83813F-HR/ATimelineGroup
BRIDGEWAY CAPITAL MANAGEMENT, LLC244,183$14.4M0.29%+12,57213F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp235,919$13.9M<0.01%+14813F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO208,454$12.3M0.01%+2,53613F-HRTimelineGroup
Nuveen, LLCin group TIAA193,913$11.4M<0.01%+39613F-HRTimelineGroup
Allianz SEgroup of 2 filers holding184,210$10.9M+85,499Timeline
UBS Group AGgroup of 2 filers holding183,502$10.8M+31,414Timeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN178,047$10.5M<0.01%-23,54113F-HR/ATimelineGroup
DNB Asset Management ASin group DNB Asset Management AS166,582$9.81M0.03%+20,39813F-HRTimelineGroup
FEDERATED HERMES, INC.in group FEDERATED HERMES, INC.159,628$9.4M0.02%+5,08713F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC158,793$9.35M<0.01%+96,92813F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\156,118$9.2M<0.01%+90,12413F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC153,486$9.04M0.03%-2,23813F-HRTimeline
Man Group plcin group Man Group plc150,330$8.86M0.02%+89,30613F-HRTimelineGroup
Qube Research & Technologies Ltd147,045$8.66M0.01%+61,87513F-HRTimeline
Pacer Advisors, Inc.136,207$8.02M0.02%-41,98113F-HR/ATimeline
Empowered Funds, LLC133,516$7.87M0.05%new13F-HR/ATimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…125,800$7.41M0.01%+62,80013F-HRTimeline
PDT Partners, LLC116,168$6.84M0.41%+112,46813F-HRTimeline
Woodline Partners LP102,081$6.01M0.02%new13F-HR/ATimeline
Invesco Ltd.in group Invesco Ltd.94,349$5.56M<0.01%-9,41613F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…94,309$5.56M0.01%+10,56513F-HRTimelineGroup
NORDEA INVESTMENT MANAGEMENT ABin group NORDEA INVESTMENT MANAGEMENT …93,483$5.43M0.01%-4,12613F-HRTimelineGroup
Rock Point Advisors, LLC85,685$5.05M1.37%+68313F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC85,587$5.04M0.02%-107,22313F-HRTimeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …76,830$4.63M0.01%-85,51313F-HRTimelineGroup
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS76,228$4.49M<0.01%+14,58513F-HRTimelineGroup
NOMURA ASSET MANAGEMENT CO LTDgroup of 2 filers holding75,002$4.42M+13,820Timeline
KESTREL INVESTMENT MANAGEMENT CORP74,150$4.37M2.61%-50013F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …73,456$4.33M0.01%013F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC72,701$4.28M<0.01%+8,18413F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC70,514$4.15M<0.01%-15,41413F-HR/ATimelineGroup
MARTINGALE ASSET MANAGEMENT L P69,738$4.11M0.1%+47,99213F-HRTimeline
Swiss National Bank66,400$3.91M<0.01%013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC64,743$3.81M<0.01%-82,91813F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC64,190$3.78M<0.01%+37,82013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.61,270$3.61M<0.01%-51,87513F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC60,821$3.58M<0.01%+10,16013F-HRTimelineGroup
DENALI ADVISORS LLC55,000$3.24M0.36%013F-HRTimeline
EDENTREE ASSET MANAGEMENT Ltd54,550$3.21M0.97%013F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC50,926$3M<0.01%+1,25813F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC48,689$2.87M<0.01%-144,75513F-HRTimelineGroup
O'SHAUGHNESSY ASSET MANAGEMENT, LLC48,593$2.86M0.01%-6,12813F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management46,663$2.75M0.01%-21,76013F-HRTimelineGroup
RHUMBLINE ADVISERS43,619$2.57M<0.01%-88713F-HRTimeline
CastleKnight Management LP42,200$2.49M0.12%013F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…40,434$2.38M<0.01%+10,68513F-HRTimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…39,703$2.34M<0.01%+7,82913F-HRTimeline
OPPENHEIMER ASSET MANAGEMENT INC.in group OPPENHEIMER ASSET MANAGEMENT …39,241$2.31M0.03%new13F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC39,226$2.31M<0.01%+5,99613F-HRTimelineGroup
SG Americas Securities, LLC39,195$2.31M<0.01%+7,17213F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/38,607$2.27M<0.01%+5,82413F-HRTimeline
ALLIANCEBERNSTEIN L.P.35,060$2.22M<0.01%013F-HRTimeline
ISTHMUS PARTNERS, LLC36,814$2.17M0.23%+58213F-HRTimeline
CSM Advisors, LLC36,229$2.13M0.05%+3,21713F-HRTimeline
OMERS ADMINISTRATION Corp34,951$2.06M0.01%+3,50013F-HRTimeline
Hudson Bay Capital Management LPin group Hudson Bay Capital Management…34,946$2.06M0.01%-46,54413F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…33,712$1.99M0.01%new13F-HRTimelineGroup
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC33,496$1.97M<0.01%+28,51313F-HRTimelineGroup
Tidal Investments LLCin group Tidal Investments LLC31,931$1.88M0.01%+20,63613F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc31,858$1.88M<0.01%-4,68613F-HRTimelineGroup
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…30,561$1.8M0.02%new13F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources29,787$1.75M<0.01%-1,63313F-HRTimelineGroup
Kerrisdale Advisers, LLC28,074$1.65M0.63%013F-HRTimeline
Linden Thomas Advisory Services, LLC25,677$1.51M0.15%+12,96413F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC25,460$1.5M0.02%+6,22313F-HRTimelineGroup
Mitsubishi UFJ Trust & Banking Corpgroup of 2 filers holding25,342$1.49M-3,576Timeline
JB CAPITAL PARTNERS LP25,000$1.47M0.25%013F-HRTimeline
CAXTON ASSOCIATES LLP24,876$1.47M0.03%-6,64413F-HRTimeline
Caisse de depot et placement du Quebec24,500$1.44M<0.01%new13F-HRTimeline
Twelve Points Wealth Management LLC24,483$1.44M0.32%+2,97313F-HRTimeline
Oakum Bay Capital LLC23,917$1.41M0.76%-2,85013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…23,420$1.38M<0.01%013F-HRTimeline
EASTERLY INVESTMENT PARTNERS LLC23,340$1.36M0.1%-3,77313F-HRTimeline
DekaBank Deutsche Girozentrale22,580$1.34M<0.01%013F-HRTimeline
Defiance ETFs, LLC22,494$1.33M0.02%new13F-HRTimeline
HighTower Advisors, LLC22,256$1.31M<0.01%+1,92013F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD21,675$1.28M<0.01%+8,88713F-HRTimeline
KLP KAPITALFORVALTNING AS21,100$1.24M<0.01%+40013F-HRTimeline
Aviance Capital Partners, LLC20,794$1.22M0.14%+1,83513F-HRTimeline
Holocene Advisors, LP20,659$1.22M<0.01%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…18,626$1.1M0.01%-16413F-HRTimelineGroup
Vident Advisory, LLCin group Vident Advisory, LLC18,584$1.09M0.01%+4,80113F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC18,656$1.09M<0.01%new13F-HRTimelineGroup
Creative Planningin group Creative Planning18,528$1.09M<0.01%+2,74513F-HRTimelineGroup
WINCAP FINANCIAL LLC17,519$1.03M0.69%+2,05113F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson17,312$1.02M<0.01%+3,23413F-HR/ATimelineGroup
DRW Securities, LLC16,808$990K0.05%new13F-HRTimeline
Jefferies Financial Group Inc.in group Jefferies Financial Group Inc.16,737$986K0.01%013F-HRTimelineGroup
LPL Financial LLC16,366$964K<0.01%+1,75913F-HRTimeline
Morningstar Investment Management LLCin group Morningstar Investment Manage…16,130$950K0.06%-2,43213F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …15,830$933K<0.01%-8313F-HRTimelineGroup
Cambridge Investment Research Advisors,…15,260$899K<0.01%-59213F-HRTimeline
Murchinson Ltd.15,000$884K0.36%new13F-HRTimeline
BLUEFIN CAPITAL MANAGEMENT, LLC14,702$866K0.84%new13F-HRTimeline
CITIGROUP INCin group CITIGROUP INC14,599$860K<0.01%+5,85113F-HRTimelineGroup
ARISTEIA CAPITAL, L.L.C.14,167$835K0.02%+5,55813F-HRTimeline
Irenic Capital Management LP13,977$823K0.07%013F-HRTimeline
Round Hill Asset Management13,967$823K0.54%-26513F-HRTimeline
DEAN INVESTMENT ASSOCIATES, LLCgroup of 2 filers holding13,461$793K-33,279Timeline
Foguth Wealth Management, LLC.9,477$785K0.09%-31313F-HRTimeline
CAPTRUST FINANCIAL ADVISORS13,304$784K<0.01%+7,61613F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA13,289$781K<0.01%-6,26813F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC13,062$769K<0.01%+15713F-HRTimelineGroup
Old West Investment Management, LLC13,017$767K0.08%+6,22613F-HRTimeline
Clear Creek Financial Management, LLC12,299$725K0.06%+30913F-HRTimeline
Sankala Group LLC12,191$724K0.59%+24813F-HRTimeline
SEB Asset Management AB11,545$680K<0.01%13F-HRTimeline
ARGA Investment Management, LP11,401$672K0.02%013F-HRTimeline
Unison Advisors LLC11,301$666K0.05%013F-HRTimeline
Ausbil Investment Management Ltd10,998$663K0.33%-13,54713F-HRTimeline
Freestone Grove Partners LP10,911$643K<0.01%+3,57513F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC10,828$638K0.01%+7,37913F-HRTimelineGroup
Elo Mutual Pension Insurance Co10,779$635K0.01%new13F-HRTimeline
Voleon Capital Management LP10,036$591K0.01%-12,12213F-HRTimeline
FMR LLCin group FMR LLC10,030$591K<0.01%-1,75213F-HRTimelineGroup
Diversified Investment Strategies, LLC10,000$589K0.38%new13F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…9,931$585K<0.01%-1,36913F-HRTimeline
Lakewood Asset Management LLC9,690$571K0.36%-90013F-HRTimeline
Atria Investments, Inc9,496$559K0.01%+39013F-HRTimeline
Richard Bernstein Advisors LLC9,455$557K0.02%new13F-HRTimeline
SummerHaven Investment Management, LLC9,330$550K0.34%-1,86613F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM9,279$547K<0.01%-11213F-HRTimeline
Police & Firemen's Retirement System of…8,924$526K<0.01%013F-HRTimeline
WOLVERINE ASSET MANAGEMENT LLCin group WOLVERINE ASSET MANAGEMENT LLC8,900$524K0.01%013F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC8,487$500K<0.01%-5,03513F-HRTimeline
Chou Associates Management Inc.8,400$495K0.24%new13F-HRTimeline
Entropy Technologies, LP8,331$491K0.02%-5,86813F-HRTimeline
Dynamic Technology Lab Private Ltd7,940$468K0.08%013F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP7,723$455K<0.01%+1,08913F-HRTimelineGroup
STATE BOARD OF ADMINISTRATION OF FLORID…7,455$439K<0.01%013F-HRTimeline
Engineers Gate Manager LP6,930$408K0.01%+2,71513F-HRTimeline
Van Diest Capital, LLC6,912$407K0.32%new13F-HRTimeline
Grantham, Mayo, Van Otterloo & Co. LLC6,856$404K<0.01%-20313F-HRTimeline
ROMAN BUTLER FULLERTON & CO6,074$400K0.11%+68013F-HRTimeline
&PARTNERS6,394$377K<0.01%+2,79613F-HRTimeline
Quantinno Capital Management LP6,291$371K<0.01%-52413F-HRTimeline
Meixler Investment Management, Ltd.5,942$365K0.2%-1,58213F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd6,174$364K<0.01%new13F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC6,070$358K<0.01%-40,68513F-HR/ATimelineGroup
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…5,811$342K<0.01%+68513F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd5,810$342K0.01%-37113F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC5,804$342K<0.01%-17013F-HRTimelineGroup
SHUFRO ROSE & CO LLC5,800$342K0.02%new13F-HRTimeline
HRT FINANCIAL LP5,661$333K<0.01%-4,08113F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…5,586$329K<0.01%+18413F-HRTimelineGroup
Tactive Advisors, LLC5,333$314K0.09%new13F-HRTimeline
Cetera Investment Advisers5,212$307K<0.01%+14313F-HRTimeline
ProShare Advisors LLC4,880$287K<0.01%-1,26213F-HRTimeline
State of Wyoming4,692$276K0.03%+53413F-HRTimeline
Gotham Asset Management, LLC4,684$276K<0.01%-12,36313F-HRTimeline
DARK FOREST CAPITAL MANAGEMENT LP4,539$267K0.02%new13F-HRTimeline
GAMCO INVESTORS, INC. ET ALin group GAMCO Investors (Gabelli)4,484$264K<0.01%-40013F-HRTimelineGroup
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co4,433$262K<0.01%013F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC4,379$258K<0.01%-43713F-HRTimelineGroup
EXCHANGE TRADED CONCEPTS, LLC4,135$244K<0.01%+22813F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC4,127$243K0.01%new13F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC4,092$240K<0.01%new13F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP4,043$239K<0.01%+1,54613F-HRTimelineGroup
FOX RUN MANAGEMENT, L.L.C.4,065$236K0.04%new13F-HRTimeline
Arkadios Wealth Advisors3,975$234K<0.01%-3313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,831$226K<0.01%013F-HRTimeline
PARK AVENUE SECURITIES LLCin group PARK AVENUE SECURITIES LLC3,750$221K<0.01%-8713F-HRTimelineGroup
INCEPTIONR LLC3,737$220K0.05%-2,03013F-HRTimeline
Baron Wealth Management LLC3,707$218K0.07%+38713F-HRTimeline
Amundiin group Amundi3,527$208K<0.01%new13F-HRTimelineGroup
Silver Coast Investments LLC3,511$207K0.07%new13F-HRTimeline
IMC-Chicago, LLC3,500$206K<0.01%new13F-HRTimeline
Cresset Asset Management, LLC3,500$206K<0.01%013F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.3,499$206K0.01%013F-HRTimelineGroup