IOSP · NASDAQ · Chemicals - Specialty

Innospec

Supplies specialty ingredients, fuel additives, and oilfield chemistries across global industrial markets.

$95.38
After-hours close−0.01 (−0.01%)
At close$95.39(+0.05%)

Breakdown13F · Form 4

Institutions 110.36%Insiders 1.37%

A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.

Shares outstanding 24.63M · Float 24.33M · 98.8% free float

Top shareholders13F · 13D/G · Form 4

HolderShares% outstandingFormFiled
BlackRock, Inc.4.38M17.79%13FAug 7, 2026
Allspring Global Investments Holdings, LLC1.89M7.68%13FAug 13, 2026
Vanguard Portfolio Management LLC1.88M7.65%13FAug 13, 2026
Dimensional Fund Advisors LP1.31M5.30%13GJul 14, 2026
Vanguard Capital Management LLC1.11M4.50%13FAug 13, 2026

Institutions13F, as of Jun 30, 2026

280 holders · 27.18M shares · 44 new positions · 147 increased · 97 reduced · 30 closed

HolderShares% outstandingChg q/qFiled
BlackRock, Inc.4.38M17.79%+502.3KAug 7, 2026
Allspring Global Investments Holdings, LLC1.89M7.68%−423.5KAug 13, 2026
Vanguard Portfolio Management LLC1.88M7.65%+24.2KAug 13, 2026
Dimensional Fund Advisors LP1.31M5.30%+62.9KAug 11, 2026
Vanguard Capital Management LLC1.11M4.50%−6.5KAug 13, 2026
State Street Corp996.0K4.04%+31.7KAug 7, 2026
Nuveen, LLC755.7K3.07%+112.5KAug 11, 2026
Geode Capital Management, LLC666.6K2.71%+36.0KAug 12, 2026

Beneficial owners13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
BlackRock, Inc.14.70%3.68M13GApr 30, 2025
Vanguard Portfolio Management7.51%1.87M13GApr 29, 2026
Dimensional Fund Advisors LP5.30%1.31M13GJul 14, 2026
Vanguard Capital Management5.22%1.30M13GApr 30, 2026

InsidersForm 4

InsiderRoleShares% outstandingFiled
Patrick Williamsofficer: PRESIDENT & CEO231.5K0.94%Mar 3, 2026
Ian Cleminsonofficer: EVP & CFO20.4K0.08%Mar 6, 2026
David B. Jonesofficer: SVP, GC & CCO14.7K0.06%Mar 3, 2026
Corbin Barnesofficer: SVP, Corporate Dev and IR13.1K0.05%Mar 3, 2026
Milton C. Blackmoredirector10.5K0.04%Mar 6, 2026
Hardy Louis Iii Griffinofficer: SVP, HUMAN RESOURCES10.2K0.04%Mar 3, 2026
Larry PADFIELDdirector9.5K0.04%Mar 6, 2026
David Landlessdirector7.6K0.03%Mar 6, 2026
Leslie J. Parrettedirector7.4K0.03%Feb 24, 2026
Claudia Pocciadirector6.5K0.03%Mar 6, 2026

4 ten-percent owners hold 2.47M shares by Form 4, outside the officers-and-directors figure above · 18 people have not refiled in the last 18 months (814.6K shares), so they are not in the figure above

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Feb 27, 2026
Ian Cleminsonofficer: EVP & CFO
Sale · 3 lots4,760$76.5620,357
Feb 27, 2026
David Landlessdirector
Sale · 3 lots1,188$76.557,632
Feb 27, 2026
Claudia Pocciadirector
Sale · 3 lots238$76.566,508
Feb 27, 2026
Larry PADFIELDdirector
Sale · 3 lots1,188$76.559,453
Feb 27, 2026
Milton C. Blackmoredirector
Sale · 3 lots1,188$76.5510,530
Mar 3, 2026
David B. Jonesofficer: SVP, GC & CCO
Sale1,028$75.6414,693
Feb 20, 2026
Larry PADFIELDdirector
Sale1,030$81.848,508
Feb 20, 2026
Milton C. Blackmoredirector
Sale1,030$81.849,585
Nov 14, 2025
Leslie J. Parrettedirector
Purchase340$74.095,837

CongressHouse and Senate disclosures

Not reported.