Stock Ownership/IOSP

INNOSPEC INC (IOSP): Ownership & Insider Activity

Hedge funds and institutional managers reporting a position in IOSP · Materials. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders
22
13F filers
Aggregate Value
$170.6M
Across holders
Last Price
$94.73
2026-08-24
Sector
Materials
GICS
Quarterly fund activity7 increased15 reduced4 exited
Full exits: CAXTON ASSOCIATES LLP, Bridgewater Associates, LP, MILLENNIUM MANAGEMENT LLC, TUDOR INVESTMENT CORP ET AL
Institutional Holders of IOSP
↗
22 holders
Manager⇅Type⇅Shares⇅Market Value▼% of Total⇅% of Portfolio⇅Action⇅QoQ Change⇅Quarter⇅
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
Hedge Fund569K$46.3M27.1%0.0%Reduced$-2.0MQ2 2026
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
Hedge Fund483K$39.3M23.0%0.0%Added+$39.2MQ2 2026
Qube Research & Technologies Ltd
CIK 0001729829
Hedge Fund286K$23.3M13.6%0.0%Reduced$-9.8MQ2 2026
RENAISSANCE TECHNOLOGIES LLC
CIK 0001037389
Hedge Fund185K$15.1M8.8%0.0%Added+$5.4MQ2 2026
SHAW D E & CO INC
CIK 0001009207
Hedge Fund166K$13.5M7.9%0.0%Reduced$-26.6MQ2 2026
CITADEL ADVISORS LLC
CIK 0001423053
Hedge Fund99K$8.0M4.7%0.0%Reduced$-11.5MQ2 2026
BALYASNY ASSET MANAGEMENT LLC
CIK 0001218710
Hedge Fund60K$4.9M2.8%0.0%Added—Q2 2026
Point72 Asset Management, L.P.
CIK 0001603466
Hedge Fund43K$3.5M2.0%0.0%Reduced$-10.1MQ2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP
CIK 0001164508
Hedge Fund35K$2.8M1.7%0.0%Added+$1.3MQ2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLC
CIK 0001556921
Hedge Fund32K$2.6M1.5%0.0%Reduced$-6.2MQ2 2026
TWO SIGMA INVESTMENTS, LPReduced
Hedge Fund
$46.3M· 27.1% of total· 0.0% port· 569K sh· $-2.0M QoQ· Q2 2026
AQR CAPITAL MANAGEMENT LLCAdded
Hedge Fund
$39.3M· 23.0% of total· 0.0% port· 483K sh· +$39.2M QoQ· Q2 2026
Qube Research & Technologies LtdReduced
Hedge Fund
$23.3M· 13.6% of total· 0.0% port· 286K sh· $-9.8M QoQ· Q2 2026
RENAISSANCE TECHNOLOGIES LLCAdded
Hedge Fund
$15.1M· 8.8% of total· 0.0% port· 185K sh· +$5.4M QoQ· Q2 2026
SHAW D E & CO INCReduced
Hedge Fund
$13.5M· 7.9% of total· 0.0% port· 166K sh· $-26.6M QoQ· Q2 2026
CITADEL ADVISORS LLCReduced
Hedge Fund
$8.0M· 4.7% of total· 0.0% port· 99K sh· $-11.5M QoQ· Q2 2026
BALYASNY ASSET MANAGEMENT LLCAdded
Hedge Fund
$4.9M· 2.8% of total· 0.0% port· 60K sh· — QoQ· Q2 2026
Point72 Asset Management, L.P.Reduced
Hedge Fund
$3.5M· 2.0% of total· 0.0% port· 43K sh· $-10.1M QoQ· Q2 2026
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPAdded
Hedge Fund
$2.8M· 1.7% of total· 0.0% port· 35K sh· +$1.3M QoQ· Q2 2026
VOLORIDGE INVESTMENT MANAGEMENT, LLCReduced
Hedge Fund
$2.6M· 1.5% of total· 0.0% port· 32K sh· $-6.2M QoQ· Q2 2026
ExodusPoint Capital Management, LPAdded
Hedge Fund
$1.9M· 1.1% of total· 0.0% port· 24K sh· — QoQ· Q2 2026
Holocene Advisors, LPReduced
Hedge Fund
$1.9M· 1.1% of total· 0.0% port· 24K sh· $-221K QoQ· Q2 2026
MARSHALL WACE, LLPReduced
Hedge Fund
$1.9M· 1.1% of total· 0.0% port· 23K sh· $-2.8M QoQ· Q2 2026
Brevan Howard Capital Management LPReduced
Hedge Fund
$1.4M· 0.8% of total· 0.0% port· 18K sh· $-561K QoQ· Q2 2026
Schonfeld Strategic Advisors LLCReduced
Hedge Fund
$1.1M· 0.6% of total· 0.0% port· 13K sh· $-1.1M QoQ· Q2 2026
Squarepoint Ops LLCReduced
Hedge Fund
$845K· 0.5% of total· 0.0% port· 10K sh· $-497K QoQ· Q2 2026
CAPSTONE INVESTMENT ADVISORS, LLCReduced
Hedge Fund
$813K· 0.5% of total· 0.0% port· 10K sh· $-469K QoQ· Q2 2026
Magnetar Financial LLCAdded
Hedge Fund
$654K· 0.4% of total· 0.0% port· 8K sh· — QoQ· Q2 2026
Man Group plcReduced
Hedge Fund
$501K· 0.3% of total· 0.0% port· 6K sh· $-738K QoQ· Q2 2026
Gotham Asset Management, LLCReduced
Hedge Fund
$395K· 0.2% of total· 0.0% port· 5K sh· $-230K QoQ· Q2 2026
Rockefeller Capital Management L.P.Reduced
Hedge Fund
$16K· 0.0% of total· 0.0% port· 195 sh· $-8K QoQ· Q2 2026
Fulcrum Asset Management LLPAdded
Hedge Fund
$161· 0.0% of total· 0.0% port· 2 sh· — QoQ· Q2 2026
1–10 of 22
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