Innospec Inc.

IOSP

Exchange: Nasdaq
Industry: Chemicals & Allied Products
SEC CIK: 0001054905

SEC filings (opens in a new tab)

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.

Q3 2025 vs. Q2 2025

How the institutions holding Innospec Inc. changed between Q2 2025 and Q3 2025.

All holders in Q3 2025 All holders in Q2 2025

13F holders of IOSP: Q2 2025 compared with Q3 2025
Measure	Q2 2025	Of which not filed for Q3 2025	Q3 2025	Change
Holders	262	4	266	+8
Shares	24.0M	136.7K	24.0M	+54.7K (+0.2%)
Value	$2.03B	$11.5M	$1.85B	−$170.5M (−8.4%)

4 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so the changes leave them out.

New holders (32)

Institutions that held Innospec Inc. at the end of Q3 2025 but not at the end of Q2 2025.

Institutions new to IOSP in Q3 2025
Institution	Shares	Value	% of portfolio
Medina Singh Partners, LLC	235,956	$18.2M	4.25%
Healthcare of Ontario Pension Plan Trust Fund	38,971	$3.01M	0.01%
Western Standard LLC	27,000	$2.08M	1.11%
Canada Pension Plan Investment Board	26,000	$2.01M	0.00%
Capital Fund Management S.A.	12,583	$970.9K	0.01%
Quantinno Capital Management LP	9,814	$757.3K	0.00%
Semanteon Capital Management, LP	7,324	$565.1K	0.71%
Capstone Investment Advisors, LLC	6,792	$524.1K	0.00%
Connor, Clark & Lunn Investment Management Ltd.	6,359	$490.7K	0.00%
Mercer Global Advisors Inc	6,309	$486.8K	0.00%
Mariner, LLC	5,562	$429.1K	0.00%
Bailard, Inc.	4,200	$324.1K	0.01%
Atom Investors LP	3,425	$264.3K	0.02%
Inceptionr LLC	3,275	$252.7K	0.06%
Captrust Financial Advisors	2,954	$227.9K	0.00%
Farringdon Capital, Ltd.	2,746	$211.9K	0.05%
CIBC Bancorp USA Inc.	2,679	$206.7K	0.00%
Point72 (DIFC) Ltd	765	$59.0K	0.00%
Rockefeller Capital Management L.P.	323	$25.0K	0.00%
Aster Capital Management (DIFC) Ltd	149	$11.5K	0.01%
Quadrant Capital Group LLC	56	$4.32K	0.00%
High Note Wealth, LLC	52	$4.01K	0.00%
Salomon & Ludwin, LLC	48	$3.78K	0.00%
Root Financial Partners, LLC	45	$3.47K	0.00%
Sunbelt Securities, Inc.	11	$849	0.00%
First Horizon Corp	9	$694	0.00%
Wealthspire Advisors, LLC	8	$617	0.00%
Bell Investment Advisors, Inc	6	$463	0.00%
SJS Investment Consulting Inc.	2	$155	0.00%
Bay Harbor Wealth Management, LLC	2	$154	0.00%
Simplex Trading, LLC	4	$0	0.00%
Cloud Capital Management, LLC	4	$0	0.00%

Sold out (24)

Institutions that held Innospec Inc. at the end of Q2 2025 and filed for Q3 2025 without it.

Institutions that sold out of IOSP in Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Segall Bryant & Hamill, LLC	118,161	$9.94M
Raymond James Financial Inc	70,675	$5.94M
Kirr Marbach & Co LLC	54,335	$4.57M
Nebula Research & Development LLC	28,128	$2.37M
Campbell & CO Investment Adviser LLC	26,005	$2.19M
Bridgeway Capital Management, LLC	21,900	$1.84M
Pathstone Holdings, LLC	10,509	$883.7K
XTX Topco Ltd	8,039	$676.0K
Axq Capital, LP	6,751	$567.7K
Burney Co	5,291	$444.9K
Caxton Associates LLP	5,116	$430.2K
Bank of Montreal	4,217	$354.6K
Jain Global LLC	3,401	$286.0K
HighTower Advisors, LLC	2,895	$243.4K
Sanctuary Advisors, LLC	2,640	$222.0K
FORA Capital, LLC	2,619	$220.2K
Grandfield & Dodd, LLC	2,400	$201.8K
Kestra Investment Management, LLC	25	$2.31K
Skopos Labs, Inc.	22	$1.85K
Geneos Wealth Management Inc.	21	$1.77K
Larson Financial Group LLC	16	$1.34K
NewSquare Capital LLC	10	$841
Huntington National Bank	3	$252
Assetmark, Inc	3	$252

Not filed for Q3 2025 yet (4)

Institutions that held Innospec Inc. at the end of Q2 2025 and haven't filed a 13F for Q3 2025. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding IOSP in Q2 2025 that haven't filed for Q3 2025
Institution	Shares, Q2 2025	Value, Q2 2025
Norges Bank	133,545	$11.2M
CIBC World Markets Corp	3,096	$260.3K
First Horizon Advisors, Inc.	9	$757
Parkworth Wealth Management, Inc.	1	$84