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
14 Nov 25	BuyUS$25,191	Leslie Parrette	Individual	340	US$74.09
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

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	10,163	0.041%
General Public	92,795	0.375%
Individual Insiders	306,332	1.24%
Institutions	24,368,569	98.3%

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

Top Shareholders

Top 25 shareholders own 74.58% of the company

Ownership	Name	Shares	Current Value	Change %	Portfolio %
14.8%	BlackRock, Inc.	3,662,317	US$284.1m	0.81%	no data
12.6%	The Vanguard Group, Inc.	3,121,151	US$242.1m	-0.71%	no data
9.51%	Allspring Global Investments, LLC	2,356,503	US$182.8m	-1.47%	0.25%
4.74%	Dimensional Fund Advisors LP	1,175,122	US$91.2m	0.7%	0.01%
3.83%	Victory Capital Management Inc.	950,074	US$73.7m	13.7%	0.04%
3.83%	State Street Global Advisors, Inc.	949,038	US$73.6m	2.14%	no data
2.46%	Geode Capital Management, LLC	609,220	US$47.3m	-0.81%	no data
2.15%	Millennium Management LLC	533,312	US$41.4m	10.8%	0.03%
1.98%	Westwood Management Corp.	491,451	US$38.1m	9.71%	0.28%
1.53%	Medina Value Partners, LLC	378,769	US$29.4m	60.5%	5.67%
1.51%	Charles Schwab Investment Management, Inc.	373,540	US$29.0m	3.59%	no data
1.44%	Teachers Insurance and Annuity Association-College Retirement Equities Fund	356,989	US$27.7m	27.9%	0.01%
1.4%	Goldman Sachs Asset Management, L.P.	347,967	US$27.0m	64.2%	0.01%
1.29%	Qube Research & Technologies Ltd	320,504	US$24.9m	-9.47%	0.04%
1.25%	D. E. Shaw & Co., L.P.	309,927	US$24.0m	13.2%	0.02%
1.23%	Brown Advisory Incorporated	305,782	US$23.7m	-12.5%	0.03%
1.23%	Royce & Associates, LP	305,226	US$23.7m	-38%	0.2%
1.15%	Tontine Management, LLC	285,351	US$22.1m	63.1%	0.31%
1.11%	Northern Trust Global Investments	274,689	US$21.3m	-8.15%	no data
1.08%	Western Standard, LLC	268,367	US$20.8m	894%	9.22%
1.06%	AQR Capital Management, LLC	263,063	US$20.4m	48.8%	0.01%
1.01%	JP Morgan Asset Management	250,316	US$19.4m	-3.64%	no data
0.89%	UBS Asset Management AG	220,727	US$17.1m	-8.94%	no data
0.77%	Patrick Williams	190,370	US$14.8m	11.1%	no data
0.72%	Managed Account Advisors LLC	179,503	US$13.9m	-18.3%	no data

Company Analysis and Financial Data Status

Data	Last Updated (UTC time)
Company Analysis	2026/02/27 03:21
End of Day Share Price	2026/02/27 00:00
Earnings	2025/12/31
Annual Earnings	2025/12/31

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 7 analysts. 3 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.
David Silver	Freedom Capital Markets
Sean Milligan	Johnson Rice & Company, L.L.C.