Innospec Ownership

Who are the major shareholders and have insiders been buying or selling?

Recent Insider Transactions

NasdaqGS:IOSP Recent Insider Transactions by Companies or Individuals
Date	Value	Name	Entity	Shares	Max Price
13 May 25	SellUS$40,421	Leslie Parrette	Individual	446	US$90.68
03 Mar 25	SellUS$431,679	Ian Cleminson	Individual	4,275	US$100.98
21 Feb 25	SellUS$67,352	Milton Blackmore	Individual	652	US$103.30
21 Feb 25	SellUS$278,087	Corbin Barnes	Individual	2,692	US$103.30
21 Feb 25	SellUS$387,793	Philip Boon	Individual	3,754	US$103.30
21 Feb 25	SellUS$319,304	David Jones	Individual	3,091	US$103.30
21 Feb 25	SellUS$20,247	Lawrence Padfield	Individual	196	US$103.30
18 Nov 24	SellUS$36,079	Corbin Barnes	Individual	307	US$117.52
18 Nov 24	SellUS$18,921	Hardy Griffin	Individual	161	US$117.52

Insider Trading Volume

Insider Buying: Insufficient data to determine if insiders have bought more shares than they have sold in the past 3 months.

Ownership Breakdown

What is the ownership structure of IOSP?
Owner Type	Number of Shares	Ownership Percentage
State or Government	16,582	0.0668%
Individual Insiders	291,992	1.18%
General Public	344,602	1.39%
Institutions	24,179,985	97.4%

Dilution of Shares: Shareholders have not been meaningfully diluted in the past year.

Top Shareholders

Top 25 shareholders own 75.73% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
14.8%	BlackRock, Inc.	3,662,406	US$279.4m	-2.28%	no data
12.7%	The Vanguard Group, Inc.	3,162,941	US$241.3m	-1.49%	no data
10%	Allspring Global Investments, LLC	2,483,185	US$189.4m	3.26%	0.27%
4.71%	Dimensional Fund Advisors LP	1,168,925	US$89.2m	0.94%	0.01%
3.91%	State Street Global Advisors, Inc.	970,225	US$74.0m	-4.07%	no data
3.86%	Victory Capital Management Inc.	958,486	US$73.1m	-13.4%	0.04%
3.23%	First Trust Advisors LP	802,504	US$61.2m	-10.1%	0.04%
2.9%	Geode Capital Management, LLC	719,598	US$54.9m	2.05%	no data
2.53%	Royce & Associates, LP	627,502	US$47.9m	-4%	0.43%
1.72%	Brown Advisory Incorporated	425,970	US$32.5m	29.5%	0.04%
1.66%	Westwood Management Corp.	412,310	US$31.5m	7.82%	0.23%
1.43%	Charles Schwab Investment Management, Inc.	356,177	US$27.2m	0.41%	no data
1.41%	Millennium Management LLC	350,005	US$26.7m	105%	0.02%
1.24%	Qube Research & Technologies Ltd	306,761	US$23.4m	72.1%	0.03%
1.22%	Northern Trust Global Investments	302,502	US$23.1m	-4.97%	no data
1.03%	Janus Henderson Group plc	255,419	US$19.5m	-46.2%	0.01%
0.99%	JP Morgan Asset Management	246,534	US$18.8m	14.5%	no data
0.93%	Point72 Asset Management, L.P.	232,086	US$17.7m	53.9%	0.03%
0.93%	UBS Asset Management AG	231,433	US$17.7m	26%	no data
0.91%	BNY Asset Management	226,947	US$17.3m	1.24%	no data
0.85%	Managed Account Advisors LLC	210,879	US$16.1m	-2.62%	no data
0.73%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	181,946	US$13.9m	-46.8%	no data
0.69%	D. E. Shaw & Co., L.P.	171,738	US$13.1m	73.3%	0.01%
0.69%	Patrick Williams	171,404	US$13.1m	0%	no data
0.68%	Invesco Ltd.	167,865	US$12.8m	-2.73%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2025/10/10 05:34
End of Day Share Price	2025/10/10 00:00
Earnings	2025/06/30
Annual Earnings	2024/12/31

Data Sources

The data used in our company analysis is from S&P Global Market Intelligence LLC. The following data is used in our analysis model to generate this report. Data is normalised which can introduce a delay from the source being available.

Package	Data	Timeframe	Example US Source ^*
Company Financials	10 years	Income statement Cash flow statement Balance sheet	SEC Form 10-K SEC Form 10-Q
Analyst Consensus Estimates	+3 years	Forecast financials Analyst price targets	Analyst Research Reports Blue Matrix
Market Prices	30 years	Stock prices Dividends, Splits and Actions	ICE Market Data SEC Form S-1
Ownership	10 years	Top shareholders Insider trading	SEC Form 4 SEC Form 13D
Management	10 years	Leadership team Board of directors	SEC Form 10-K SEC Form DEF 14A
Key Developments	10 years	Company announcements	SEC Form 8-K

^* Example for US securities, for non-US equivalent regulatory forms and sources are used.

Unless specified all financial data is based on a yearly period but updated quarterly. This is known as Trailing Twelve Month (TTM) or Last Twelve Month (LTM) Data. Learn more.

Analysis Model and Snowflake

Details of the analysis model used to generate this report is available on our Github page, we also have guides on how to use our reports and tutorials on Youtube.

Learn about the world class team who designed and built the Simply Wall St analysis model.

Industry and Sector Metrics

Our industry and section metrics are calculated every 6 hours by Simply Wall St, details of our process are available on Github.

Analyst Sources

Innospec Inc. is covered by 8 analysts. 2 of those analysts submitted the estimates of revenue or earnings used as inputs to our report. Analysts submissions are updated throughout the day.

Analyst	Institution
Jonathan Tanwanteng	CJS Securities, Inc.
Sean Milligan	Johnson Rice & Company, L.L.C.
Jeffrey Zekauskas	J.P. Morgan