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Livermore
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Innospec Inc.

IOSP
Exchange
Nasdaq
Industry
Chemicals & Allied Products
SEC CIK
0001054905

No open-market purchases or sales by Innospec Inc. insiders were filed in the last 90 days; 281 institutions reported holding it in 13F filings for Q2 2026, worth $2.00B in total; no superinvestor holds it.

13F holders, Q1 2026

Institutional positions in Innospec Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Institutional holders
266
+11 vs. Q4 2025
Shares held
24.9M
+3.92M (+18.7%) vs. Q4 2025
Total value
$1.82B
+$214.6M (+13.3%) vs. Q4 2025
New holders
41
114 more added
Sold out
30
79 more reduced

6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q4 2025: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting IOSP on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holdersQ1 2026: 266 institutions
Q1 2021: 180 institutionsQ2 2021: 180 institutionsQ3 2021: 188 institutionsQ4 2021: 184 institutionsQ1 2022: 188 institutionsQ2 2022: 199 institutionsQ3 2022: 193 institutionsQ4 2022: 223 institutionsQ1 2023: 219 institutionsQ2 2023: 205 institutionsQ3 2023: 212 institutionsQ4 2023: 223 institutionsQ1 2024: 239 institutionsQ2 2024: 266 institutionsQ3 2024: 261 institutionsQ4 2024: 262 institutionsQ1 2025: 272 institutionsQ2 2025: 262 institutionsQ3 2025: 266 institutionsQ4 2025: 261 institutionsQ1 2026: 266 institutionsQ2 2026: 281 institutions
Value heldQ1 2026: $1.82B
Q1 2021: $2.42BQ2 2021: $2.12BQ3 2021: $1.97BQ4 2021: $2.14BQ1 2022: $2.20BQ2 2022: $2.29BQ3 2022: $2.03BQ4 2022: $2.44BQ1 2023: $2.45BQ2 2023: $2.39BQ3 2023: $2.44BQ4 2023: $2.96BQ1 2024: $3.10BQ2 2024: $2.96BQ3 2024: $2.73BQ4 2024: $2.66BQ1 2025: $2.29BQ2 2025: $2.03BQ3 2025: $1.85BQ4 2025: $1.86BQ1 2026: $1.82BQ2 2026: $2.00B
Institutions holding IOSP and their total value by quarter
QuarterHoldersValue
Q2 2026281$2.00B
Q1 2026266$1.82B
Q4 2025261$1.86B
Q3 2025266$1.85B
Q2 2025262$2.03B
Q1 2025272$2.29B
Q4 2024262$2.66B
Q3 2024261$2.73B
Q2 2024266$2.96B
Q1 2024239$3.10B
Q4 2023223$2.96B
Q3 2023212$2.44B
Q2 2023205$2.39B
Q1 2023219$2.45B
Q4 2022223$2.44B
Q3 2022193$2.03B
Q2 2022199$2.29B
Q1 2022188$2.20B
Q4 2021184$2.14B
Q3 2021188$1.97B
Q2 2021180$2.12B
Q1 2021180$2.42B

Institutions, Q1 2026

Shares, value and share of portfolio for each institution holding Innospec Inc.; share changes are against Q4 2025.

Institutions holding IOSP in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
LPL Financial LLC4,910$358.5K0.00%−167−3.3%Reduced
Bell & Brown Wealth Advisors, LLC4,966$362.6K0.12%00.0%Unchanged
Cetera Investment Advisers5,315$388.1K0.00%+456+9.4%Added
Diversified Trust Co5,378$392.7K0.01%+1,555+40.7%Added
Keybank National Association5,583$407.7K0.00%−418−7.0%Reduced
Quantinno Capital Management LP5,606$409.4K0.00%−1,691−23.2%Reduced
Oregon Public Employees Retirement Fund5,631$411.2K0.01%00.0%Unchanged
Bridgewater Associates, LP5,950$434.5K0.00%+5,950New
Ethic Inc.6,091$444.8K0.01%+740+13.8%Added
Commonwealth of Pennsylvania Public School Empls Retrmt Sys6,127$447.4K0.00%−7−0.1%Reduced
Teachers Retirement System of the State of Kentucky6,230$455.0K0.00%00.0%Unchanged
Zurcher Kantonalbank (Zurich Cantonalbank)6,419$468.7K0.00%−3,046−32.2%Reduced
Aigen Investment Management, LP6,589$481.1K0.12%+3,609+121.1%Added
Yousif Capital Management, LLC6,619$483.3K0.01%−94−1.4%Reduced
Guggenheim Capital LLC6,641$484.9K0.00%+1,052+18.8%Added
State Board of Administration of Florida Retirement System6,727$491.2K0.00%00.0%Unchanged
Axq Capital, LP6,784$495.4K0.06%+6,784New
Arizona State Retirement System6,805$496.9K0.00%−80−1.2%Reduced
Police & Firemen's Retirement System of New Jersey6,951$507.6K0.00%00.0%Unchanged
CWM Advisors, LLC7,033$513.5K0.03%+947+15.6%Added
Amalgamated Bank7,135$521.0K0.00%−80−1.1%Reduced
Gotham Asset Management, LLC7,674$560.4K0.00%+7,674New
Vanguard Investments Australia, Ltd.7,935$579.4K0.00%+7,935New
Wealth Enhancement Advisory Services, LLC7,897$582.7K0.00%−1,326−14.4%Reduced
Man Group plc8,092$590.9K0.00%+2,375+41.5%Added
HGK Asset Management Inc8,373$611.4K0.09%+4,057+94.0%Added
Mercer Global Advisors Inc8,404$613.7K0.00%+869+11.5%Added
GWM Advisors LLC8,625$629.8K0.00%+2,114+32.5%Added
New York State Teachers Retirement System8,651$632.0K0.00%+689+8.7%Added
Quantbot Technologies LP8,780$641.1K0.03%+4,677+114.0%Added
Amundi8,875$648.1K0.00%+3,686+71.0%Added
New York State Common Retirement Fund8,911$650.7K0.00%00.0%Unchanged
Vanguard Global Advisers, LLC9,793$715.1K0.00%+9,793New
Horizon Investments, LLC9,956$727.0K0.01%+9,956New
EntryPoint Capital, LLC9,993$729.7K0.21%−692−6.5%Reduced
Mirabella Financial Services LLP10,359$756.4K0.07%+10,359New
Susquehanna International Group, LLP10,492$766.1K0.00%+4,369+71.4%Added
Freestone Grove Partners LP10,511$767.5K0.01%−2,964−22.0%Reduced
Louisiana State Employees Retirement System11,000$803.2K0.01%−400−3.5%Reduced
Manufacturers Life Insurance Company, The11,203$818.0K0.00%−391−3.4%Reduced
Jacobs Levy Equity Management, Inc11,622$848.6K0.00%00.0%Unchanged
Mirae Asset Global ETFs Holdings Ltd.11,642$850.1K0.00%+87+0.8%Added
Linden Thomas Advisory Services, LLC11,810$862.4K0.08%+449+4.0%Added
Round Hill Asset Management11,974$874.3K0.57%00.0%Unchanged
Fifth Third Bancorp12,482$911.5K0.00%+12,251+5,303.5%Added
Quadrature Capital Ltd12,500$912.8K0.01%+6,545+109.9%Added
First Trust Advisors LP12,716$928.5K0.00%+440+3.6%Added
State of Tennessee, Treasury Department12,867$939.5K0.00%+2,704+26.6%Added
State of Alaska, Department of Revenue13,465$982.0K0.01%−282−2.1%Reduced
Illinois Municipal Retirement Fund13,861$1.01M0.01%+1,094+8.6%Added
MetLife Investment Management14,131$1.03M0.01%−125−0.9%Reduced
CWM, LLC14,328$1.05M0.00%+3,876+37.1%Added
Summit Global Investments14,430$1.05M0.06%+14,430New
Capstone Investment Advisors, LLC15,757$1.15M0.01%+4,405+38.8%Added
Squarepoint Ops LLC16,486$1.20M0.00%+16,486New
Thrivent Financial for Lutherans16,539$1.21M0.00%−487−2.9%Reduced
Vanguard Asset Management, Ltd17,279$1.26M0.00%+17,279New
Richard Bernstein Advisors LLC17,281$1.26M0.04%+17,281New
Raymond James Financial Inc17,515$1.28M0.00%+17,515New
Wells Fargo & Company17,626$1.29M0.00%−17,465−49.8%Reduced
Aquatic Capital Management LLC18,185$1.33M0.04%+8,526+88.3%Added
Arrowstreet Capital, Limited Partnership18,497$1.35M0.00%+12,259+196.5%Added
Campbell & CO Investment Adviser LLC18,751$1.37M0.08%+18,751New
Mariner, LLC19,710$1.44M0.00%+4,027+25.7%Added
Entropy Technologies, LP19,968$1.46M0.07%+4,989+33.3%Added
Great West Life Assurance Co20,305$1.48M0.00%−974−4.6%Reduced
Capital Fund Management S.A.20,834$1.52M0.01%−1,043−4.8%Reduced
Gsa Capital Partners LLP21,100$1.54M0.10%+3,678+21.1%Added
Barclays PLC21,189$1.55M0.00%−24,659−53.8%Reduced
Wedge Capital Management L L P21,473$1.57M0.03%+1,774+9.0%Added
Centiva Capital, LP21,641$1.58M0.07%+21,641New
Cerity Partners LLC22,513$1.64M0.00%+3,204+16.6%Added
Deutsche Bank AG22,750$1.66M0.00%+3,085+15.7%Added
KLP Kapitalforvaltning AS23,300$1.70M0.01%+18,000+339.6%Added
Citigroup Inc23,792$1.74M0.00%+6,079+34.3%Added
CM Management, LLC24,000$1.75M1.47%+4,000+20.0%Added
Brevan Howard Capital Management LP24,436$1.78M0.02%+10,974+81.5%Added
Voya Investment Management LLC25,093$1.83M0.00%−171−0.7%Reduced
Huber Capital Management LLC25,148$1.84M0.28%+2,600+11.5%Added
Prudential Financial Inc25,269$1.85M0.00%+1,805+7.7%Added
HSBC Holdings PLC25,351$1.85M0.00%+10,504+70.7%Added
Dark Forest Capital Management LP25,643$1.87M0.17%−18,881−42.4%Reduced
Jump Financial, LLC26,200$1.91M0.03%+3,900+17.5%Added
Schonfeld Strategic Advisors LLC26,250$1.92M0.02%+8,573+48.5%Added
Holocene Advisors, LP26,473$1.93M0.00%+7,428+39.0%Added
Moran Wealth Management, LLC27,031$1.97M0.06%−15,004−35.7%Reduced
California State Teachers Retirement System27,529$2.01M0.00%+3,729+15.7%Added
Alliancebernstein L.P.26,509$2.03M0.00%−414−1.5%Reduced
State of New Jersey Common Pension Fund D28,227$2.06M0.01%−2,087−6.9%Reduced
Ingalls & Snyder LLC28,927$2.11M0.07%00.0%Unchanged
Price T Rowe Associates Inc31,826$2.32M0.00%+3,443+12.1%Added
Connors Investor Services Inc33,095$2.42M0.22%+570+1.8%Added
Penn Capital Management Co Inc33,286$2.43M0.19%+33,286New
Y-Intercept (Hong Kong) Ltd33,296$2.43M0.05%+8,682+35.3%Added
Franklin Resources Inc33,485$2.45M0.00%+4,974+17.4%Added
Marshall Wace, LLP33,526$2.45M0.00%+24,298+263.3%Added
Edgestream Partners, L.P.34,226$2.50M0.08%−12,208−26.3%Reduced
PDT Partners, LLC34,576$2.52M0.15%−8,300−19.4%Reduced
XTX Topco Ltd36,292$2.65M0.05%+26,555+272.7%Added
Creative Planning37,635$2.75M0.00%−7,058−15.8%Reduced