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Disclosery

IOSP INNOSPEC INC

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COM (common), issuer CIK 1054905

261 managers (263 13F filers) reported a position in IOSP shares at 2025-06-30, 24,043,126 shares in all. 30 filers opened a position and 40 filers sold out during the quarter.

Managers
261
13F filers
263
New
30
Added
109
Reduced
87
Sold out
40
Shares held by filers
24,043,126

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

Each filer's latest stake. The shares are the aggregate the reporting persons state, which can include entities that file no 13F.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q2 2025

Filers in the available 13F reports with a share position at 2025-06-30, 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.3,662,412$308M0.01%-85,31413F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC3,162,941$266M<0.01%-47,82713F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …2,483,185$216M0.36%+78,36013F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,168,925$98.3M0.02%+10,90813F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP970,225$81.6M<0.01%-41,21613F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC958,486$80.6M0.05%-147,99613F-HRTimeline
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP802,504$67.5M0.05%-89,64913F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC719,598$60.5M<0.01%+14,46313F-HRTimelineGroup
ROYCE & ASSOCIATES LP627,502$52.8M0.54%-26,13413F-HRTimeline
BROWN ADVISORY INCin group BROWN ADVISORY INC426,544$35.9M0.05%+97,12913F-HRTimelineGroup
WESTWOOD HOLDINGS GROUP INCin group WESTWOOD HOLDINGS GROUP INC412,310$34.7M0.25%+29,90013F-HR/ATimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co356,177$30M0.01%+1,47113F-HRTimelineGroup
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC350,005$29.4M0.03%+179,59113F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO321,164$27M<0.01%+48,15213F-HRTimelineGroup
Qube Research & Technologies Ltd306,761$25.8M0.04%+128,54413F-HRTimeline
NORTHERN TRUST CORPin group NORTHERN TRUST CORP302,502$25.4M<0.01%-15,80413F-HRTimelineGroup
Nuveen, LLCin group TIAA296,012$24.9M0.01%-157,45313F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/295,498$24.8M<0.01%+51,81213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY263,835$22.2M<0.01%+24,64013F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson255,419$21.5M0.01%-219,09913F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding231,433$19.5M+47,795Timeline
Bank of New York Mellon Corpin group Bank of New York Mellon Corp231,007$19.4M<0.01%+2,26813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.223,763$18.8M<0.01%-26,11413F-HRTimelineGroup
Cubist Systematic Strategies, LLC219,088$18.4M0.2%+88,66113F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding218,739$18.4M+101,993Timeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.171,738$14.4M0.01%+72,66213F-HRTimelineGroup
VOLORIDGE INVESTMENT MANAGEMENT, LLC160,163$13.5M0.05%-29,62313F-HRTimeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC147,338$12.4M0.01%-179,95113F-HRTimelineGroup
RENAISSANCE TECHNOLOGIES LLC146,600$12.3M0.02%+19,70013F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding137,216$11.5M+4,715Timeline
NORGES BANK133,545$11.2M<0.01%+27,85613F-HRTimeline
SEGALL BRYANT & HAMILL, LLC118,161$9.94M0.14%+20,22013F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC117,199$9.86M0.02%+21,95613F-HRTimelineGroup
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC104,671$8.8M<0.01%-27,72813F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC94,576$7.95M0.01%+19,43213F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC85,277$7.17M<0.01%+19,19013F-HRTimelineGroup
Public Sector Pension Investment Board84,959$7.14M0.03%+5,83813F-HRTimeline
RHUMBLINE ADVISERS81,481$6.85M0.01%+3,72113F-HRTimeline
GENDELL JEFFREY Lin group GENDELL JEFFREY L79,781$6.71M0.18%+2,53413F-HRTimelineGroup
PANAGORA ASSET MANAGEMENT INC79,158$6.66M0.03%+6013F-HRTimeline
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…77,255$6.5M0.07%+73,62213F-HRTimelineGroup
ProShare Advisors LLC75,056$6.31M0.01%+69,18513F-HRTimeline
Leeward Investments, LLC - MA73,734$6.2M0.33%-2,70513F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC72,024$6.06M0.01%+57,70613F-HRTimelineGroup
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC70,675$5.94M<0.01%-116,54113F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC70,235$5.91M0.02%+9,69013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc69,673$5.86M<0.01%+94313F-HRTimelineGroup
Numerai GP LLC62,892$5.29M0.76%new13F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS60,010$5.05M0.02%+53,80913F-HRTimeline
Trexquant Investment LP59,424$5M0.06%-92213F-HRTimeline
ExodusPoint Capital Management, LP56,808$4.78M0.06%+45,84513F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC55,861$4.7M<0.01%+8,31613F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO55,472$4.66M0.01%+6,87113F-HRTimelineGroup
KIRR MARBACH & CO LLC /IN/54,335$4.57M0.9%-24,73113F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC51,510$4.33M<0.01%+15,02313F-HR/ATimelineGroup
SG Americas Securities, LLC50,924$4.28M0.02%+48,34913F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN48,246$4.06M<0.01%-4,97013F-HRTimelineGroup
Swiss National Bank48,003$4.04M<0.01%-30013F-HRTimeline
Balyasny Asset Management L.P.in group Balyasny Asset Management47,239$3.97M0.01%+11,23813F-HRTimelineGroup
Edgestream Partners, L.P.47,068$3.96M0.11%-22,97113F-HRTimeline
Moran Wealth Management, LLC42,603$3.58M0.11%-2,42213F-HRTimeline
Y-Intercept (Hong Kong) Ltd41,245$3.47M0.08%new13F-HRTimeline
Walleye Capital LLCin group Walleye Capital LLC40,120$3.37M0.03%+30,66913F-HRTimelineGroup
ZWJ INVESTMENT COUNSEL INC39,420$3.31M0.12%-6,89113F-HRTimeline
Engineers Gate Manager LP39,062$3.28M0.04%+7,82713F-HRTimeline
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…36,861$3.1M<0.01%+2,55813F-HRTimelineGroup
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC26,049$3.05M<0.01%+1,65013F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…35,757$3.01M0.01%-74213F-HR/ATimelineGroup
Verition Fund Management LLC32,618$2.74M0.02%+18,41013F-HRTimeline
TWINBEECH CAPITAL LP32,249$2.71M0.06%new13F-HRTimeline
HRT FINANCIAL LP32,242$2.71M0.01%+13,04913F-HRTimeline
Quantbot Technologies LP31,052$2.61M0.07%+15,05613F-HRTimeline
ALGERT GLOBAL LLC30,548$2.57M0.05%+1,69013F-HR/ATimeline
Schonfeld Strategic Advisors LLC29,431$2.47M0.02%+20,97113F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co29,268$2.46M<0.01%+29313F-HRTimelineGroup
DARK FOREST CAPITAL MANAGEMENT LP29,197$2.46M0.1%new13F-HRTimeline
INGALLS & SNYDER LLC28,927$2.43M0.09%013F-HRTimeline
AlphaQuest LLC28,814$2.42M0.24%+25,84713F-HRTimeline
CITIGROUP INCin group CITIGROUP INC28,291$2.38M<0.01%-13,28613F-HRTimelineGroup
Nebula Research & Development LLC28,128$2.37M0.2%+3,82913F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources27,672$2.33M<0.01%+67313F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.27,223$2.29M<0.01%-1,13013F-HRTimeline
Bahl & Gaynor LLC26,575$2.23M0.01%-4,36813F-HRTimeline
Campbell & CO Investment Adviser LLC26,005$2.19M0.14%+21,62913F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…23,062$1.94M<0.01%+17913F-HRTimeline
TUDOR INVESTMENT CORP ET AL22,773$1.91M0.01%+9,45813F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/22,381$1.88M<0.01%+1,50813F-HRTimeline
JACOBS LEVY EQUITY MANAGEMENT, INC22,056$1.85M0.01%-4,13613F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC21,900$1.84M0.04%-21,90013F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…21,862$1.84M0.01%+2,89413F-HRTimelineGroup
CONNORS INVESTOR SERVICES INC21,566$1.81M0.16%-4713F-HRTimeline
Assenagon Asset Management S.A.21,143$1.78M<0.01%new13F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC20,969$1.76M0.02%-1,05413F-HRTimeline
Huber Capital Management LLC20,148$1.69M0.29%-48,78713F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS19,985$1.68M<0.01%+14,55613F-HRTimelineGroup
Holocene Advisors, LP19,441$1.63M<0.01%+11,71313F-HRTimeline
GSA CAPITAL PARTNERS LLP19,300$1.62M0.11%new13F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP19,109$1.61M0.18%-1,52313F-HRTimeline
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA18,501$1.56M<0.01%-11,76613F-HR/ATimelineGroup
Vest Financial, LLC18,253$1.53M0.02%-2,12613F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC17,253$1.45M<0.01%-10,94113F-HRTimelineGroup
Dynamic Technology Lab Private Ltd16,801$1.41M0.19%+6,61613F-HRTimeline
State of Tennessee, Department of Treas…16,582$1.39M<0.01%013F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\16,395$1.38M<0.01%-3,31513F-HRTimelineGroup
Tredje AP-fonden15,047$1.27M0.01%+4,54813F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…14,957$1.26M<0.01%+1,97613F-HRTimeline
WEDGE CAPITAL MANAGEMENT L L P/NC14,952$1.26M0.02%new13F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…14,889$1.25M0.01%+15913F-HRTimelineGroup
Cerity Partners LLCin group Cerity Partners LLC14,833$1.25M<0.01%+1,61513F-HRTimelineGroup
State of Alaska, Department of Revenue14,845$1.25M0.01%+1,02413F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…13,772$1.16M<0.01%-1,06113F-HRTimelineGroup
PDT Partners, LLC13,443$1.13M0.06%new13F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …13,127$1.1M<0.01%-63813F-HRTimelineGroup
Aquatic Capital Management LLC13,024$1.1M0.02%+2,65313F-HRTimeline
Illinois Municipal Retirement Fund12,917$1.09M0.01%-30113F-HRTimeline
Jump Financial, LLCin group Jump Financial, LLC12,259$1.03M0.01%+4,80813F-HR/ATimelineGroup
QSV Equity Investors LLC12,165$1.02M1.07%-14213F-HRTimeline
COMERICA BANK12,095$1.02M<0.01%+3,66613F-HRTimeline
Round Hill Asset Management11,974$1.01M0.68%013F-HRTimeline
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC11,857$1M<0.01%+4,45913F-HRTimelineGroup
Linden Thomas Advisory Services, LLC11,736$987K0.11%-19013F-HRTimeline
Louisiana State Employees Retirement Sy…11,700$984K0.02%013F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…11,596$975K<0.01%-1,10013F-HRTimeline
Ensign Peak Advisors, Inc11,159$938K<0.01%013F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.11,048$929K<0.01%-4,55213F-HRTimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC10,509$884K<0.01%-4,83313F-HRTimelineGroup
Entropy Technologies, LP10,379$873K0.07%new13F-HRTimeline
CM Management, LLC10,000$841K0.77%new13F-HRTimeline
IEQ CAPITAL, LLC9,977$839K0.01%new13F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD9,592$807K<0.01%+6,93713F-HRTimeline
Freestone Grove Partners LP9,277$780K0.01%new13F-HRTimeline
YOUSIF CAPITAL MANAGEMENT, LLC9,275$780K0.01%+4113F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…9,053$761K0.01%-1,65613F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND8,911$749K<0.01%+1,20013F-HR/ATimeline
JAMES INVESTMENT RESEARCH, INC.8,334$701K0.08%013F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd8,039$676K0.03%-4,50613F-HRTimelineGroup
Squarepoint Ops LLCin group Squarepoint Ops LLC7,727$650K<0.01%new13F-HR/ATimelineGroup
STRS OHIO7,400$622K<0.01%-1,00013F-HRTimeline
TEACHERS RETIREMENT SYSTEM OF THE STATE…7,339$617K<0.01%-51513F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM7,318$615K<0.01%+17513F-HRTimeline
Maryland State Retirement & Pension Sys…7,276$612K0.01%013F-HRTimeline
AMALGAMATED BANK7,127$599K<0.01%+1313F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…6,756$568K<0.01%013F-HRTimeline
AXQ CAPITAL, LP6,751$568K0.18%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…6,710$564K0.02%+6,43013F-HRTimelineGroup
LPL Financial LLC6,693$563K<0.01%-4,08313F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…6,649$559K<0.01%013F-HRTimeline
Aigen Investment Management, LP6,422$540K0.07%+2,56313F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…6,408$539K<0.01%+43913F-HRTimeline
Petrus Trust Company, LTA6,135$516K0.05%+1,29613F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND5,731$482K0.01%013F-HRTimeline
Police & Firemen's Retirement System of…5,628$473K<0.01%+32013F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC5,552$467K<0.01%+90913F-HRTimelineGroup
R Squared Ltd5,511$463K0.26%+2,74113F-HRTimeline
CWM, LLCin group CWM, LLC5,492$462K<0.01%+4,86013F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…5,348$450K<0.01%+35313F-HRTimelineGroup
BURNEY CO/5,291$445K0.02%-24,15413F-HRTimeline
CAXTON ASSOCIATES LLP5,116$430K0.01%-1,06613F-HRTimeline
DRW Securities, LLC5,109$430K0.03%+2,77213F-HRTimeline
KLP KAPITALFORVALTNING AS5,000$420K<0.01%013F-HRTimeline
Bell & Brown Wealth Advisors, LLC4,966$418K0.15%-25013F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…4,899$412K<0.01%-1,71713F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC4,685$393K<0.01%+1,82113F-HRTimelineGroup
Inspire Investing, LLCin group Inspire Investing, LLC4,620$388K0.04%+99013F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\4,586$386K<0.01%-49613F-HRTimelineGroup
Man Group plcin group Man Group plc4,544$382K<0.01%+11813F-HRTimelineGroup
HUDSON EDGE INVESTMENT PARTNERS INC.4,525$381K0.07%-29813F-HRTimeline
NewEdge Advisors, LLC4,503$379K<0.01%-6413F-HRTimeline
Amundiin group Amundi4,276$377K<0.01%-6,36213F-HRTimelineGroup
MQS Management LLC4,311$363K0.2%new13F-HRTimeline
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/4,217$355K<0.01%-80413F-HRTimelineGroup
Legacy Wealth Asset Management, LLC4,152$349K0.09%-59813F-HRTimeline
WEALTH ENHANCEMENT ADVISORY SERVICES, L…3,893$345K<0.01%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…4,052$341K<0.01%+40413F-HRTimelineGroup
Creative Planningin group Creative Planning4,015$338K<0.01%-1,29213F-HRTimelineGroup
MACKENZIE FINANCIAL CORP3,559$299K<0.01%013F-HRTimeline
DIVERSIFIED TRUST CO3,510$295K0.01%013F-HRTimeline
Jain Global LLC3,401$286K<0.01%new13F-HRTimeline
Polymer Capital Management (US) LLC3,358$282K0.05%new13F-HRTimeline
OXFORD ASSET MANAGEMENT LLP3,233$272K0.09%new13F-HRTimeline
MEEDER ASSET MANAGEMENT INCin group Meeder Advisory Services, Inc.3,225$271K0.02%new13F-HRTimelineGroup
CIBC WORLD MARKETS CORP3,096$260K<0.01%-2,43613F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,018$254K<0.01%013F-HRTimeline
HighTower Advisors, LLC2,895$243K<0.01%-49713F-HRTimeline
Sanctuary Advisors, LLC2,640$222K<0.01%-41613F-HRTimeline
FORA Capital, LLC2,619$220K0.02%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,608$219K0.01%013F-HRTimelineGroup
EntryPoint Capital, LLC2,596$218K0.11%-6,33613F-HRTimeline
GRANDFIELD & DODD, LLC2,400$202K0.01%013F-HRTimeline
Vestcor Inc2,141$180K0.01%013F-HRTimeline
FMR LLCin group FMR LLC1,987$167K<0.01%+67013F-HRTimelineGroup
Point72 Asia (Singapore) Pte. Ltd.1,950$164K0.03%+12113F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,762$148K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,756$148K<0.01%-9713F-HRTimelineGroup
SHELL ASSET MANAGEMENT CO1,170$98K<0.01%-12813F-HRTimeline
Murphy & Mullick Capital Management Corp962$76.9K0.06%013F-HRTimeline
HM PAYSON & CO909$76.4K<0.01%013F-HRTimeline
KBC Group NVin group KBC Group NV860$72K<0.01%-37613F-HRTimelineGroup
State of Wyoming801$67.4K0.01%+17313F-HRTimeline
MAI Capital Management794$66.8K<0.01%+3513F-HRTimeline

Events

  • Allspring Global Investments Holdings, LLC reported 1,161,421 IOSP shares, 4.7% of the class, as of 2026-09-30, in a 13G/A filed 2026-10-07. 0001890906-26-000074

    Accepted , ingested

  • Allspring Global Investments Holdings, LLC reported 1,161,421 IOSP shares, 4.7% of the class, as of 2026-09-30, in a 13G filed 2026-10-07. 0001890906-26-000068

    Accepted , ingested