INNOSPEC INC.

IOSPNASDAQ

$97.41+2.24 (+2.35%)as of Oct 2, 2026

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

INNOSPEC INC. price and activity chart data

Showing the 1Y range: Oct 2, 2025 to Oct 2, 2026. Price (+23.9%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
BlackRock, Inc.	17.79%	$357M	0.01%	Not reported
Vanguard Portfolio Management LLC	7.65%	$153M	0.01%	Not reported
Dimensional Fund Advisors LP	5.30%	$106M	0.02%	Not reported
Vanguard Capital Management LLC	4.50%	$90.2M	0.00%	Not reported
State Street Corp	4.04%	$81.1M	0.00%	Not reported
Nuveen, LLC	3.07%	$61.5M	0.01%	Not reported
Geode Capital Management, LLC	2.71%	$54.3M	0.00%	Not reported
Goldman Sachs Group Inc	2.69%	$53.9M	0.00%	Not reported
Victory Capital Management Inc	2.68%	$53.7M	0.03%	Not reported
Two Sigma Investments, LP	2.31%	$46.3M	0.03%	Not reported
Assenagon Asset Management S.A.	2.21%	$44.4M	0.03%	Not reported
AQR Capital Management LLC	1.96%	$39.3M	0.01%	Not reported
Brown Advisory Inc	1.66%	$33.2M	0.05%	Not reported
JPMorgan Chase & Co	1.50%	$30M	0.00%	Not reported
Charles Schwab Investment Management Inc	1.44%	$28.9M	0.00%	Not reported
Gendell Jeffrey L	1.32%	$26.4M	0.23%	Add 10.19%
Royce & Associates LP	1.25%	$25.1M	0.20%	Not reported
Northern Trust Corp	1.23%	$24.7M	0.00%	Not reported
Qube Research & Technologies Ltd	1.16%	$23.3M	0.02%	Not reported
Acadian Asset Management LLC	1.11%	$22.3M	0.03%	Not reported
Western Standard LLC	0.96%	$19.3M	6.53%	Add 4.41%
Bank of America Corp	0.96%	$19.2M	0.00%	Not reported
Morgan Stanley	0.94%	$18.8M	0.00%	Not reported
Renaissance Technologies LLC	0.75%	$15.1M	0.02%	Not reported
Panagora Asset Management Inc	0.74%	$14.9M	0.05%	Not reported
D. E. Shaw & Co., Inc.	0.67%	$13.5M	0.01%	Not reported
Vanguard Fiduciary Trust Co	0.66%	$13.3M	0.00%	Not reported
Sei Investments Co	0.63%	$12.7M	0.01%	Not reported
UBS Group AG	0.63%	$12.5M	0.00%	Not reported
First Wilshire Securities Management Inc	0.60%	$12M	2.47%	Reduce 0.65%
Mackenzie Financial Corp	0.59%	$11.8M	0.01%	Not reported
Bank of New York Mellon Corp	0.56%	$11.2M	0.00%	Not reported
Hotchkis & Wiley Capital Management LLC	0.55%	$11M	0.03%	Add 12.36%
Jupiter Topco LLC	0.52%	$10.4M	0.00%	Not reported
Leeward Investments, LLC - MA	0.51%	$10.2M	0.46%	Add 79.50%
Principal Financial Group Inc	0.48%	$9.69M	0.00%	Not reported
Russell Investments Group, Ltd.	0.48%	$9.64M	0.01%	Not reported
Invesco Ltd.	0.48%	$9.64M	0.00%	Not reported
ZWJ Investment Counsel Inc	0.44%	$8.83M	0.29%	Add 4.54%
Creative Planning	0.42%	$8.48M	0.01%	Not reported
Citadel Advisors LLC	0.40%	$8.02M	0.00%	Not reported
Deprince Race & Zollo Inc	0.38%	$7.6M	0.13%	Add 37.22%
First Trust Advisors LP	0.37%	$7.43M	0.00%	Add 617.62%
Public Sector Pension Investment Board	0.34%	$6.88M	0.02%	Reduce 4.64%
Mutual of America Capital Management LLC	0.34%	$6.75M	0.07%	Not reported
FMR LLC	0.34%	$6.74M	0.00%	Not reported
ProShare Advisors LLC	0.33%	$6.61M	0.01%	Not reported
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	0.30%	$5.98M	0.00%	Not reported
SG Capital Management LLC	0.29%	$5.78M	0.48%	Not reported
Numerai GP LLC	0.27%	$5.45M	0.45%	Reduce 12.64%

50 of 263 holders

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