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Disclosery

IOSP INNOSPEC INC

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COM (common), issuer CIK 1054905

270 managers (273 13F filers) reported a position in IOSP shares at 2025-03-31, 24,501,780 shares in all. 40 filers opened a position and 32 filers sold out during the quarter.

Managers
270
13F filers
273
New
40
Added
97
Reduced
91
Sold out
32
Shares held by filers
24,501,780

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, Q1 2025

Filers in the available 13F reports with a share position at 2025-03-31, 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
BlackRock, Inc.in group BlackRock, Inc.3,747,726$355M0.01%-160,22113F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC3,210,768$304M0.01%+30,03113F-HRTimelineGroup
Allspring Global Investments Holdings, …in group Allspring Global Investments …2,404,825$227M0.39%+19,01813F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP1,158,017$110M0.03%-56613F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC1,106,482$105M0.11%+184,26213F-HRTimeline
STATE STREET CORPin group STATE STREET CORP1,011,441$95.8M<0.01%-24,11313F-HRTimelineGroup
FIRST TRUST ADVISORS LPin group FIRST TRUST ADVISORS LP892,153$84.5M0.07%+462,23213F-HRTimelineGroup
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC705,135$66.8M0.01%+13,06413F-HRTimelineGroup
ROYCE & ASSOCIATES LP653,636$61.9M0.67%-124,07513F-HRTimeline
WASATCH ADVISORS LP528,144$50M0.28%-1,051,97113F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson474,518$45.2M0.02%+6,58013F-HRTimelineGroup
Nuveen, LLCin group TIAA453,465$43M0.01%13F-HRTimelineGroup
WESTWOOD HOLDINGS GROUP INCin group WESTWOOD HOLDINGS GROUP INC382,410$36.2M0.27%+84,31413F-HRTimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co354,706$33.6M0.01%+2,12913F-HR/ATimelineGroup
BROWN ADVISORY INCin group BROWN ADVISORY INC329,415$31.2M0.04%new13F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC327,289$31M0.03%+126,75013F-HR/ATimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP318,306$30.2M<0.01%-9,17013F-HRTimelineGroup
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO273,012$25.9M<0.01%-39,86813F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.249,877$23.7M<0.01%-202,28213F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/243,686$23.1M<0.01%+10,23213F-HRTimelineGroup
MORGAN STANLEYin group MORGAN STANLEY239,195$22.7M<0.01%+1,31813F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp228,739$21.7M<0.01%-8,87713F-HRTimelineGroup
VOLORIDGE INVESTMENT MANAGEMENT, LLC189,786$18M0.07%+147,32613F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC187,216$17.7M0.01%-3,52013F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding183,638$17.4M+9,948Timeline
Qube Research & Technologies Ltd178,217$16.9M0.03%+85,04713F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC170,414$16.1M0.02%+168,35513F-HRTimelineGroup
Financial Harvest, LLC433,843$12.6M10.42%new13F-HRTimeline
PRINCIPAL FINANCIAL GROUP INCgroup of 2 filers holding132,501$12.6M+3,045Timeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC132,399$12.5M<0.01%+8,01413F-HR/ATimelineGroup
Cubist Systematic Strategies, LLC130,427$12.4M0.16%+86,78013F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC126,900$12M0.02%+122,10013F-HRTimeline
TWO SIGMA INVESTMENTS, LPgroup of 2 filers holding116,746$11.1M+93,476Timeline
NORGES BANK105,689$10M<0.01%+2,91013F-HR/ATimeline
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.99,076$9.39M0.01%+61,04413F-HRTimelineGroup
SEGALL BRYANT & HAMILL, LLC97,941$9.28M0.14%-2,73413F-HRTimeline
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC95,243$9.02M0.02%+89,47613F-HR/ATimelineGroup
Public Sector Pension Investment Board79,121$7.5M0.03%+16,99313F-HRTimeline
PANAGORA ASSET MANAGEMENT INC79,098$7.49M0.04%+2613F-HRTimeline
KIRR MARBACH & CO LLC /IN/79,066$7.49M1.74%+1,37013F-HRTimeline
RHUMBLINE ADVISERS77,760$7.37M0.01%+6,60213F-HR/ATimeline
GENDELL JEFFREY Lin group GENDELL JEFFREY L77,247$7.32M0.32%-18,07013F-HRTimelineGroup
Leeward Investments, LLC - MA76,439$7.24M0.39%-3,59113F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC75,144$7.12M0.01%+49,72113F-HRTimelineGroup
Edgestream Partners, L.P.70,039$6.64M0.23%+56,99113F-HRTimeline
Huber Capital Management LLC68,935$6.53M1.23%+19,80013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc68,730$6.51M<0.01%-2,91913F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC66,087$6.26M<0.01%-3,49113F-HRTimelineGroup
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC60,545$5.74M0.02%-76013F-HRTimeline
Trexquant Investment LP60,346$5.72M0.07%+39,97913F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN53,216$5.04M<0.01%-2,48613F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO48,601$4.6M0.01%-90,57213F-HR/ATimelineGroup
Swiss National Bank48,303$4.58M<0.01%-80013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC47,545$4.5M<0.01%+10,30913F-HRTimelineGroup
ZWJ INVESTMENT COUNSEL INC46,311$4.39M0.18%+2,88513F-HRTimeline
Moran Wealth Management, LLC45,025$4.27M0.14%-3,13913F-HRTimeline
BRIDGEWAY CAPITAL MANAGEMENT, LLC43,800$4.15M0.1%013F-HRTimeline
CITIGROUP INCin group CITIGROUP INC41,577$3.94M<0.01%+6,40013F-HRTimelineGroup
Thrivent Financial for Lutheransin group Thrivent Financial for Luther…36,499$3.46M0.01%-95913F-HR/ATimelineGroup
BARCLAYS PLCin group BARCLAYS PLC36,487$3.46M<0.01%-9,17313F-HR/ATimelineGroup
Balyasny Asset Management L.P.in group Balyasny Asset Management36,001$3.41M0.01%new13F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPin group SUSQUEHANNA INTERNATIONAL GRO…34,303$3.25M0.01%+22,67613F-HRTimelineGroup
Engineers Gate Manager LP31,235$2.96M0.05%+27,87113F-HRTimeline
Bahl & Gaynor LLC30,943$2.93M0.01%-5,01313F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC24,399$2.9M<0.01%-97013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA30,267$2.87M<0.01%-76913F-HR/ATimelineGroup
BURNEY CO/29,445$2.79M0.1%+2,01013F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co28,975$2.75M<0.01%-2,23113F-HRTimelineGroup
INGALLS & SNYDER LLC28,927$2.74M0.09%+5913F-HRTimeline
ALGERT GLOBAL LLC28,858$2.73M0.07%-5,35713F-HR/ATimeline
ALLIANCEBERNSTEIN L.P.28,353$2.69M<0.01%013F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC28,194$2.67M<0.01%+64013F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources26,999$2.56M<0.01%+22113F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC26,192$2.48M0.01%-1,19113F-HRTimeline
Nebula Research & Development LLC24,299$2.3M0.21%+12,62513F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…22,883$2.17M<0.01%-43913F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC22,023$2.09M0.02%+5,17813F-HRTimeline
CONNORS INVESTOR SERVICES INC21,613$2.05M0.2%-24313F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/20,873$1.98M<0.01%+85513F-HRTimeline
OCCUDO QUANTITATIVE STRATEGIES LP20,632$1.96M0.26%+15,86913F-HRTimeline
Vest Financial, LLC20,379$1.93M0.03%new13F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\19,710$1.87M<0.01%-2,27313F-HRTimelineGroup
HRT FINANCIAL LP19,193$1.82M0.01%new13F-HRTimeline
State of New Jersey Common Pension Fund…in group State of New Jersey Common Pe…18,968$1.8M0.01%+97913F-HRTimelineGroup
State of Tennessee, Department of Treas…16,582$1.57M0.01%+50513F-HRTimeline
Quantbot Technologies LP15,996$1.52M0.05%new13F-HRTimeline
Point72 Asset Management, L.P.in group Point72 Asset Management, L.P.15,600$1.48M<0.01%+13,17513F-HR/ATimelineGroup
Pathstone Holdings, LLCin group Pathstone Holdings, LLC15,342$1.45M0.01%-63813F-HRTimelineGroup
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…14,833$1.41M<0.01%+64513F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…14,730$1.4M0.01%-49613F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC14,318$1.36M<0.01%-1,56513F-HRTimelineGroup
Verition Fund Management LLC14,208$1.35M0.01%+11,81713F-HRTimeline
State of Alaska, Department of Revenue13,821$1.31M0.01%-32813F-HRTimeline
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …13,765$1.3M<0.01%+52413F-HRTimelineGroup
TUDOR INVESTMENT CORP ET AL13,315$1.26M0.01%new13F-HRTimeline
Illinois Municipal Retirement Fund13,218$1.25M0.02%-21113F-HRTimeline
Cerity Partners LLCin group Cerity Partners LLC13,218$1.25M<0.01%-2913F-HRTimelineGroup
Corebridge Financial, Inc.in group Corebridge Financial, Inc.13,018$1.23M0.01%-25513F-HRTimelineGroup
HEALTHCARE OF ONTARIO PENSION PLAN TRUS…13,000$1.23M<0.01%013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…12,981$1.23M<0.01%-2,50013F-HRTimeline
NEW YORK STATE TEACHERS RETIREMENT SYST…12,696$1.2M<0.01%-2,28513F-HRTimeline
XTX Topco Ltdin group XTX Topco Ltd12,545$1.19M0.06%new13F-HRTimelineGroup
QSV Equity Investors LLC12,307$1.17M1.21%-2813F-HRTimeline
Round Hill Asset Management11,974$1.13M0.82%013F-HRTimeline
Linden Thomas Advisory Services, LLC11,926$1.13M0.15%-4113F-HRTimeline
Louisiana State Employees Retirement Sy…11,700$1.11M0.02%-40013F-HRTimeline
AMG National Trust Bank11,614$1.1M0.03%+1813F-HRTimeline
B. Metzler seel. Sohn & Co. AGin group B. Metzler seel. Sohn & Co. AG11,559$1.1M0.01%-13,47213F-HRTimelineGroup
Ensign Peak Advisors, Inc11,159$1.06M<0.01%013F-HRTimeline
ExodusPoint Capital Management, LP10,963$1.04M0.01%new13F-HRTimeline
LPL Financial LLC10,776$1.02M<0.01%+1,19313F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…10,709$1.01M0.03%+3,20713F-HRTimelineGroup
Tredje AP-fonden10,499$995K0.01%013F-HRTimeline
Aquatic Capital Management LLC10,371$983K0.03%+9,75513F-HRTimeline
Dynamic Technology Lab Private Ltd10,185$965K0.14%new13F-HRTimeline
Amundiin group Amundi10,638$941K<0.01%-2,38013F-HRTimelineGroup
Walleye Capital LLCin group Walleye Capital LLC9,451$895K0.01%new13F-HRTimelineGroup
YOUSIF CAPITAL MANAGEMENT, LLC9,234$875K0.01%-23613F-HRTimeline
EntryPoint Capital, LLC8,932$846K0.39%+5,31413F-HRTimeline
Schonfeld Strategic Advisors LLC8,460$802K0.01%+4,72013F-HRTimeline
COMERICA BANK8,429$799K<0.01%-20813F-HRTimeline
STRS OHIO8,400$796K<0.01%013F-HRTimeline
JAMES INVESTMENT RESEARCH, INC.8,334$790K0.1%013F-HRTimeline
Virtu Financial LLCin group Virtu Financial LLC8,297$786K0.04%new13F-HRTimelineGroup
TEACHERS RETIREMENT SYSTEM OF THE STATE…7,854$744K0.01%013F-HRTimeline
Holocene Advisors, LP7,728$732K<0.01%new13F-HRTimeline
NEW YORK STATE COMMON RETIREMENT FUND7,711$731K<0.01%013F-HR/ATimeline
Jump Financial, LLCin group Jump Financial, LLC7,451$706K0.01%+69313F-HR/ATimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC7,398$700K<0.01%+20813F-HRTimelineGroup
Centiva Capital, LP7,320$694K0.04%new13F-HRTimeline
Maryland State Retirement & Pension Sys…7,276$689K0.02%-1,08313F-HRTimeline
Magnetar Financial LLCin group Magnetar Financial LLC7,181$680K0.01%new13F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM7,143$677K<0.01%-8013F-HRTimeline
AMALGAMATED BANK7,114$674K0.01%-20313F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…6,756$640K<0.01%013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…6,649$630K<0.01%013F-HRTimeline
KEYBANK NATIONAL ASSOCIATION/OHin group KEYBANK NATIONAL ASSOCIATION/…6,616$627K<0.01%+1,18713F-HRTimelineGroup
TEACHER RETIREMENT SYSTEM OF TEXAS6,201$588K<0.01%-50,78013F-HRTimeline
CAXTON ASSOCIATES LLP6,182$586K0.02%13F-HRTimeline
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCH…5,969$566K<0.01%+64413F-HRTimeline
ProShare Advisors LLC5,871$556K<0.01%-1,64113F-HRTimeline
OREGON PUBLIC EMPLOYEES RETIREMENT FUND5,731$543K0.01%-16913F-HRTimeline
Gotham Asset Management, LLC5,617$532K<0.01%-6713F-HRTimeline
Scientech Research LLC5,612$532K0.14%new13F-HRTimeline
CIBC WORLD MARKETS CORP5,532$524K<0.01%+3,20013F-HRTimeline
HANCOCK WHITNEY CORP5,435$515K0.02%+34713F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS5,429$514K<0.01%+1,18913F-HRTimelineGroup
Police & Firemen's Retirement System of…5,308$503K0.01%013F-HRTimeline
Creative Planningin group Creative Planning5,307$503K<0.01%+56013F-HRTimelineGroup
Bell & Brown Wealth Advisors, LLC5,216$494K0.19%013F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\5,082$482K<0.01%+20713F-HRTimelineGroup
BANK OF MONTREAL /CAN/in group BANK OF MONTREAL /CAN/5,021$476K<0.01%-1,47213F-HRTimelineGroup
KLP KAPITALFORVALTNING AS5,000$474K<0.01%013F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…4,995$473K<0.01%+75313F-HRTimelineGroup
Petrus Trust Company, LTA4,839$458K0.04%new13F-HRTimeline
HUDSON EDGE INVESTMENT PARTNERS INC.4,823$457K0.09%-10013F-HRTimeline
Legacy Wealth Asset Management, LLC4,750$450K0.12%-66013F-HRTimeline
GUGGENHEIM CAPITAL LLCin group GUGGENHEIM CAPITAL LLC4,643$440K<0.01%+1,91413F-HRTimelineGroup
NewEdge Advisors, LLC4,567$433K<0.01%+1,24313F-HRTimeline
BAILARD, INC.4,500$426K0.01%new13F-HRTimeline
Man Group plcin group Man Group plc4,426$419K<0.01%+1,20513F-HRTimelineGroup
Campbell & CO Investment Adviser LLC4,376$415K0.03%new13F-HRTimeline
INCEPTIONR LLC4,279$405K0.12%new13F-HRTimeline
Aigen Investment Management, LP3,859$366K0.06%new13F-HRTimeline
TWO SIGMA SECURITIES, LLC3,729$353K0.05%new13F-HRTimeline
Pictet Asset Management Holding SAin group Pictet Asset Management Holdi…3,648$346K<0.01%013F-HRTimelineGroup
Allianz Asset Management GmbHin group Allianz SE3,644$345K<0.01%-1,37913F-HRTimelineGroup
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLCin group MUTUAL OF AMERICA CAPITAL MAN…3,633$344K<0.01%-14613F-HR/ATimelineGroup
Inspire Investing, LLCgroup of 2 filers holding3,630$344K-6,713Timeline
Aster Capital Management (DIFC) Ltd3,266$338K0.06%new13F-HRTimeline
MACKENZIE FINANCIAL CORP3,559$337K<0.01%+58013F-HRTimeline
DIVERSIFIED TRUST CO3,510$333K0.01%-3313F-HRTimeline
HighTower Advisors, LLC3,392$321K<0.01%-10213F-HRTimeline
STIFEL FINANCIAL CORPin group STIFEL FINANCIAL CORP3,250$308K<0.01%-10213F-HRTimelineGroup
Sanctuary Advisors, LLC3,056$290K<0.01%-5313F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION…3,018$286K<0.01%013F-HRTimeline
Point72 (DIFC) Ltd2,999$284K0.03%new13F-HRTimeline
AlphaQuest LLC2,967$281K0.03%-9,68913F-HRTimeline
Ethic Inc.2,922$276K0.01%-86813F-HRTimeline
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC2,864$271K<0.01%-3,68813F-HRTimelineGroup
R Squared Ltd2,770$262K0.28%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
STATE OF WISCONSIN INVESTMENT BOARD2,655$252K<0.01%+34013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…2,608$247K0.01%013F-HRTimelineGroup
SG Americas Securities, LLC2,575$244K<0.01%-13,14613F-HRTimeline
Lido Advisors, LLCin group Lido Advisors, LLC2,482$235K<0.01%+1513F-HRTimelineGroup
GRANDFIELD & DODD, LLC2,400$227K0.01%013F-HRTimeline
DRW Securities, LLC2,337$221K0.02%new13F-HRTimeline
Corient Private Wealth LPin group Corient Private Wealth LP2,276$216K<0.01%+913F-HRTimelineGroup
Crossmark Global Holdings, Inc.2,250$213K<0.01%-1713F-HRTimeline
Stonegate Investment Group, LLC2,208$209K0.01%-913F-HRTimeline
Baird Financial Group, Inc.in group Baird Financial Group, Inc.2,170$206K<0.01%+22313F-HRTimelineGroup
Vestcor Inc2,141$203K0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,853$176K<0.01%-1513F-HRTimelineGroup
Point72 Asia (Singapore) Pte. Ltd.1,829$173K0.05%+23713F-HRTimeline
NISA INVESTMENT ADVISORS, LLC1,762$167K<0.01%-32613F-HRTimeline
Smartleaf Asset Management LLC1,429$136K0.01%-37313F-HRTimeline
FMR LLCin group FMR LLC1,317$125K<0.01%-73413F-HRTimelineGroup
SHELL ASSET MANAGEMENT CO1,298$123K0.01%-5513F-HRTimeline
Caitong International Asset Management …1,282$121K0.09%new13F-HRTimeline
KBC Group NVin group KBC Group NV1,236$117K<0.01%013F-HRTimelineGroup

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