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Disclosery

IOSP INNOSPEC INC

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COM (common), issuer CIK 1054905

275 managers (282 13F filers) reported a position in IOSP shares at 2026-06-30, 24,595,409 shares in all. 43 filers opened a position and 27 filers sold out during the quarter.

Managers
275
13F filers
282
New
43
Added
103
Reduced
97
Sold out
27
Shares held by filers
24,595,409

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
BlackRock, Inc.in group BlackRock, Inc.4,381,323$357M0.01%+502,34813F-HRTimelineGroup
VANGUARD GROUP INCgroup of 7 filers holding3,190,643$260M+19,905Timeline
Allspring Global Investments Holdings, …in group Allspring Global Investments …1,892,471$155M0.24%-423,47113F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,305,038$106M0.02%+62,94913F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP996,027$81.1M<0.01%+31,69213F-HRTimelineGroup
Nuveen, LLCin group TIAA755,723$61.5M0.01%+112,47513F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC666,589$54.3M<0.01%+35,99713F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC662,210$53.9M0.01%+170,19913F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC660,110$53.7M0.03%-204,88413F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP568,709$46.3M0.03%-24,33013F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC482,545$39.3M0.01%+170,48013F-HRTimelineGroup
BROWN ADVISORY INCin group BROWN ADVISORY INC408,468$33.2M0.05%+112,00313F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO370,574$30M<0.01%-55,47613F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co355,658$28.9M<0.01%-10,21613F-HRTimelineGroup
GENDELL JEFFREY Lin group GENDELL JEFFREY L324,504$26.4M0.24%+30,00013F-HRTimelineGroup
ROYCE & ASSOCIATES LP308,726$25.1M0.2%+47,39013F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP303,044$24.7M<0.01%+18,80513F-HRTimelineGroup
Qube Research & Technologies Ltd285,849$23.3M0.03%-120,77513F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC273,999$22.3M0.03%+151,44713F-HRTimelineGroup
Assenagon Asset Management S.A.272,782$22.2M0.03%-218,10213F-HR/ATimeline
Western Standard LLC236,833$19.3M6.53%+10,00013F-HRTimeline
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/235,742$19.2M<0.01%-55,02413F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY230,793$18.8M<0.01%-4,77813F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding227,458$18.5M-412,896Timeline
RENAISSANCE TECHNOLOGIES LLC185,000$15.1M0.02%+66,10013F-HRTimeline
PANAGORA ASSET MANAGEMENT INC182,538$14.9M0.05%+62,86313F-HRTimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.165,746$13.5M0.01%-121,04813F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO156,051$12.7M0.01%-18,07013F-HRTimelineGroup
FIRST WILSHIRE SECURITIES MANAGEMENT INC147,112$12M2.47%-96013F-HRTimeline
MACKENZIE FINANCIAL CORP144,677$11.8M0.01%new13F-HRTimeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp137,261$11.2M<0.01%+5,97013F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC135,740$11M0.03%+14,93013F-HRTimeline
Jupiter Topco LLCin group Janus Henderson127,976$10.4M<0.01%13F-HRTimelineGroup
Leeward Investments, LLC - MA125,308$10.2M0.46%+55,49813F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCin group PRINCIPAL FINANCIAL GROUP INC119,053$9.69M<0.01%-1,42413F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…118,614$9.64M0.01%+47,00713F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.118,427$9.64M<0.01%+34313F-HRTimelineGroup
ZWJ INVESTMENT COUNSEL INC108,502$8.83M0.29%+4,71513F-HRTimeline
Creative Planningin group Creative Planning104,224$8.48M<0.01%+66,58913F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC98,549$8.02M<0.01%-122,33413F-HRTimelineGroup
DEPRINCE RACE & ZOLLO INC93,348$7.6M0.13%+25,31913F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP91,252$7.43M<0.01%+78,53613F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS85,463$6.96M0.02%-17,63913F-HRTimeline
Public Sector Pension Investment Board84,577$6.88M0.02%-4,11713F-HR/ATimeline
HRT FINANCIAL LP84,349$6.87M0.01%-40,70613F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…82,920$6.75M0.07%-4,54313F-HRTimelineGroup
FMR LLCin group FMR LLC82,759$6.74M<0.01%+30,95413F-HRTimelineGroup
ProShare Advisors LLC81,232$6.61M0.01%-8,60913F-HRTimeline
SG Capital Management LLC71,022$5.78M0.52%new13F-HRTimeline
Numerai GP LLC66,931$5.45M0.45%-9,68513F-HRTimeline
RHUMBLINE ADVISERS65,055$5.29M<0.01%-6,10213F-HRTimeline
Trexquant Investment LP60,528$4.93M0.03%-17,84213F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management59,751$4.86M0.01%new13F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc58,841$4.79M<0.01%-27913F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC55,093$4.48M<0.01%-14113F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC54,517$4.44M<0.01%-2,01813F-HRTimelineGroup
Swiss National Bank49,903$4.06M<0.01%+90013F-HRTimeline
IEQ CAPITAL, LLC45,343$3.69M0.02%+5,38313F-HRTimeline
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…43,995$3.58M0.01%-17,67413F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.42,648$3.47M0.01%-124,14613F-HRTimelineGroup
Atom Investors LP40,870$3.33M0.3%+9913F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS39,514$3.22M<0.01%+1,54713F-HRTimelineGroup
DARK FOREST CAPITAL MANAGEMENT LP38,862$3.16M0.2%+13,21913F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources38,748$3.15M<0.01%+5,26313F-HRTimelineGroup
INTECH INVESTMENT MANAGEMENT LLC38,292$3.12M0.03%-6,67513F-HRTimeline
SG Americas Securities, LLC37,665$3.07M<0.01%-23,20313F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/37,345$3.04M<0.01%+5,51913F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …34,876$2.84M<0.01%+16,37913F-HRTimelineGroup
CM Management, LLC32,000$2.6M1.65%+8,00013F-HRTimeline
VOLORIDGE INVESTMENT MANAGEMENT, LLC31,857$2.59M0.01%-76,10613F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC31,315$2.55M<0.01%+8,80213F-HRTimelineGroup
PDT Partners, LLC31,176$2.54M0.13%-3,40013F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN30,221$2.46M<0.01%+12,59513F-HRTimelineGroup
Edgestream Partners, L.P.29,208$2.38M0.07%-5,01813F-HRTimeline
Huber Capital Management LLC29,148$2.37M0.35%+4,00013F-HRTimeline
INGALLS & SNYDER LLC28,927$2.35M0.06%013F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…27,765$2.26M<0.01%+23613F-HR/ATimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\27,565$2.24M<0.01%+4,81513F-HRTimelineGroup
Mariner, LLCin group Mariner, LLC26,935$2.19M<0.01%+7,22513F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC25,915$2.11M<0.01%+82213F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC25,692$2.09M<0.01%+1,90013F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.28,622$2.09M<0.01%+2,11313F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC25,529$2.08M<0.01%+26013F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC24,713$2.01M<0.01%+3,52413F-HRTimelineGroup
ExodusPoint Capital Management, LP23,810$1.94M0.02%new13F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC23,693$1.94M<0.01%-1,65813F-HRTimelineGroup
Holocene Advisors, LP23,760$1.93M<0.01%-2,71313F-HRTimeline
Moran Wealth Management, LLC23,639$1.92M0.05%-3,39213F-HRTimeline
CONNORS INVESTOR SERVICES INC23,363$1.9M0.16%-9,73213F-HRTimeline
KLP KAPITALFORVALTNING AS23,300$1.9M0.01%013F-HRTimeline
MARSHALL WACE, LLPin group MARSHALL WACE, LLP23,075$1.88M<0.01%-10,45113F-HRTimelineGroup
WEDGE CAPITAL MANAGEMENT L L P/NC20,329$1.65M0.03%-1,14413F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd20,188$1.64M0.02%-16,10413F-HRTimelineGroup
Linden Thomas Advisory Services, LLC19,815$1.61M0.13%+8,00513F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co19,508$1.59M<0.01%-79713F-HRTimelineGroup
Blackstone Inc.in group Blackstone Inc.19,163$1.56M0.01%new13F-HRTimelineGroupThe filing omitted confidential holdings, a later amendment may add them.
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…17,540$1.43M0.02%-6,89613F-HRTimelineGroup
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…17,315$1.41M<0.01%-10,91213F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…16,174$1.32M<0.01%-36513F-HRTimelineGroup
Y-Intercept (Hong Kong) Ltd14,815$1.21M0.02%-18,48113F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…14,712$1.2M0.01%+58113F-HRTimelineGroup
MERCER GLOBAL ADVISORS INC /ADV14,522$1.18M<0.01%+6,11813F-HR/ATimeline
GSA CAPITAL PARTNERS LLP14,271$1.16M0.07%-6,82913F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…13,679$1.12M<0.01%+5,78213F-HRTimeline
Schonfeld Strategic Advisors LLC13,276$1.08M0.01%-12,97413F-HRTimeline
Centiva Capital, LP13,234$1.08M0.04%-8,40713F-HRTimeline
Illinois Municipal Retirement Fund13,043$1.06M0.01%-81813F-HRTimeline
DIVERSIFIED TRUST CO12,625$1.03M0.02%+7,24713F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …12,070$982K<0.01%+86713F-HRTimelineGroup
Round Hill Asset Management11,974$975K0.61%013F-HRTimeline
FIFTH THIRD BANCORPin group FIFTH THIRD BANK, NATIONAL AS…11,654$949K<0.01%-82813F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…11,617$946K<0.01%-2513F-HRTimelineGroup
NewEdge Advisors, LLC11,286$919K<0.01%+2,66113F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC10,959$892K<0.01%-66313F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…10,930$890K<0.01%+2,27913F-HRTimeline
Louisiana State Employees Retirement Sy…10,800$879K0.01%-20013F-HR/ATimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC10,379$845K<0.01%-6,10713F-HRTimelineGroup
Horizon Investments, LLC10,167$827K0.01%+21113F-HRTimeline
CAPSTONE INVESTMENT ADVISORS, LLCin group CAPSTONE INVESTMENT ADVISORS,…9,993$813K0.01%-5,76413F-HRTimelineGroup
EntryPoint Capital, LLC9,993$813K0.2%013F-HRTimeline
State of Tennessee, Department of Treas…9,756$794K<0.01%-3,11113F-HRTimeline
State of Alaska, Department of Revenue9,243$752K0.01%-4,22213F-HRTimeline
Quadrature Capital Ltdin group Quadrature Capital Ltd8,972$730K0.01%-3,52813F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND8,911$725K<0.01%013F-HRTimeline
Quantinno Capital Management LP8,906$725K<0.01%+3,30013F-HRTimeline
Entropy Technologies, LP8,739$711K0.03%-11,22913F-HRTimeline
Universal- Beteiligungs- und Serviceges…in group Universal- Beteiligungs- und …8,605$700K<0.01%+4,07813F-HRTimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC8,302$676K0.03%+1,26913F-HRTimelineGroup
CAPTRUST FINANCIAL ADVISORS8,113$660K<0.01%+4,51313F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC8,039$654K0.01%new13F-HRTimelineGroup
Police & Firemen's Retirement System of…7,489$610K<0.01%+53813F-HRTimeline
Freestone Grove Partners LP7,189$585K<0.01%-3,32213F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM6,868$559K<0.01%+6313F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…6,727$548K<0.01%013F-HRTimeline
AMALGAMATED BANK6,632$540K<0.01%-50313F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC6,568$535K0.01%-5113F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…6,419$522K<0.01%013F-HRTimeline
Engineers Gate Manager LP6,340$516K0.01%-58,34213F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…6,230$507K<0.01%013F-HRTimeline
Man Group plcin group Man Group plc6,151$501K<0.01%-1,94113F-HRTimelineGroup
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…5,841$475K<0.01%-28613F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD5,688$463K<0.01%new13F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC5,614$457K<0.01%-1,02713F-HRTimelineGroup
OREGON PUBLIC EMPLOYEES RETIREMENT FUND5,591$455K<0.01%-4013F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC5,500$448K<0.01%-20,70013F-HRTimelineGroup
Jain Global LLC5,413$441K0.01%new13F-HRTimeline
LPL Financial LLC5,186$422K<0.01%+27613F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…5,006$407K<0.01%-57713F-HRTimelineGroup
Gotham Asset Management, LLC4,848$395K<0.01%-2,82613F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…4,708$383K<0.01%013F-HRTimelineGroup
Headlands Technologies LLC4,632$377K0.04%+1,11313F-HRTimeline
Indivisible Partners4,233$345K0.02%+36513F-HRTimeline
Cetera Investment Advisers3,845$313K<0.01%-1,47013F-HRTimeline
Focus Partners Wealthin group Focus Partners Wealth3,783$308K<0.01%new13F-HRTimelineGroup
Merit Financial Group, LLC3,758$306K<0.01%new13F-HR/ATimeline
Vise Technologies, Inc.3,650$297K<0.01%new13F-HRTimeline
Aigen Investment Management, LP3,647$297K0.08%-2,94213F-HRTimeline
MQS Management LLC3,643$297K0.36%-1913F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…3,615$294K<0.01%-6,87713F-HRTimelineGroup
Amundiin group Amundi3,565$290K<0.01%-5,31013F-HRTimelineGroup
Maryland State Retirement & Pension Sys…3,560$290K<0.01%-5213F-HRTimeline
Tidal Investments LLCin group Tidal Investments LLC3,330$271K<0.01%-52313F-HRTimelineGroup
BRIGHTON JONES LLC3,235$263K<0.01%new13F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,018$246K<0.01%013F-HRTimeline
JAMES INVESTMENT RESEARCH, INC.3,015$245K0.02%013F-HRTimeline
Arax Advisory Partners3,014$245K<0.01%+2,71113F-HRTimeline
iSAM Funds (UK) Ltdin group iSAM Funds (UK) Ltd3,000$244K0.17%-92213F-HRTimelineGroup
MAI Capital Management2,991$243K<0.01%+1,41513F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP2,982$243K<0.01%new13F-HR/ATimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC2,718$221K<0.01%new13F-HRTimelineGroup
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …2,609$212K<0.01%+1,99313F-HRTimelineGroup
Bell & Brown Wealth Advisors, LLC2,609$212K0.06%-2,35713F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC2,587$211K0.02%new13F-HRTimeline
Ethic Inc.2,551$208K<0.01%-3,54013F-HRTimeline
Sequoia Financial Advisors, LLC2,540$207K<0.01%new13F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/2,515$205K<0.01%new13F-HRTimelineGroup
XPONANCE LLC2,512$204K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,289$186K<0.01%+19013F-HRTimelineGroup
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…2,198$179K<0.01%+29613F-HRTimelineGroup
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP1,901$157K<0.01%+78613F-HRTimelineGroup
Integrated Wealth Concepts LLC1,658$135K<0.01%new13F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,601$130K<0.01%-29913F-HRTimeline
CENTAURUS FINANCIAL, INC.1,444$118K<0.01%new13F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA1,382$112K<0.01%+63713F-HRTimelineGroup
Allworth Financial LP1,310$107K<0.01%+38013F-HRTimeline
MACQUARIE GROUP LTDin group MACQUARIE GROUP LTD1,270$103K<0.01%new13F-HRTimelineGroup
Smartleaf Asset Management LLC1,229$99.2K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,207$98.2K<0.01%+12813F-HRTimelineGroup
Ensign Peak Advisors, Inc1,059$86.2K<0.01%-15013F-HRTimeline
Nykredit A/Sin group Nykredit A/S996$81.1K<0.01%13F-HRTimelineGroup
Aster Capital Management (DIFC) Ltd965$78.5K0.02%-66513F-HR/ATimeline
Murphy & Mullick Capital Management Corp962$78.3K0.05%013F-HRTimeline
KBC Group NVin group KBC Group NV860$70K<0.01%013F-HRTimelineGroup
Covestor Ltd837$69K0.04%+60113F-HRTimeline
Eurizon Capital SGR S.p.A.804$65K<0.01%013F-HRTimeline
SIGNATUREFD, LLC774$63K<0.01%-3413F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…763$62.1K<0.01%+7613F-HRTimeline
HANTZ FINANCIAL SERVICES, INC.753$61K<0.01%+33313F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…746$60.7K<0.01%+2813F-HRTimelineGroup
Pinnacle Wealth Planning Services, Inc.724$58.9K0.01%+1713F-HRTimeline