Innospec (IOSP) Institutional Ownership

$93.63 +0.71 (+0.76%)

As of 08/21/2026 04:00 PM Eastern

Current Institutional Ownership Percentage: 96.64%
Number of Institutional Buyers (last 12 months): 137
Total Institutional Inflows (last 12 months): $710.82M

Number of Institutional Sellers (last 12 months): 96
Total Institutional Outflows (last 12 months): $218.34M

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IOSP Institutional Buying and Selling by Quarter

Innospec Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/21/2026	iSAM Funds UK Ltd	3,000	$244K	0.2%	-23.5%	0.012%
8/21/2026	Nykredit A S	996	$81K	0.0%	N/A	0.004%
8/20/2026	Headlands Technologies LLC	4,632	$377K	0.0%	+31.6%	0.019%
8/20/2026	Susquehanna International Group LLP	3,615	$294K	0.0%	-65.5%	0.015%
8/19/2026	UBS AM a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	73,457	$5.98M	0.0%	-1.3%	0.298%
8/19/2026	Hsbc Holdings PLC	23,693	$1.94M	0.0%	-6.5%	0.096%
8/18/2026	Centaurus Financial Inc.	1,444	$118K	0.0%	N/A	0.006%
8/18/2026	Public Employees Retirement System of Ohio	763	$62K	0.0%	N/A	0.003%
8/17/2026	Capstone Investment Advisors LLC	9,993	$813K	0.0%	N/A	0.041%
8/17/2026	Bank of America Corp DE	235,742	$19.19M	0.0%	N/A	0.957%
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8/15/2026	Freestone Grove Partners LP	7,189	$585K	0.0%	N/A	0.029%
8/15/2026	Man Group plc	6,151	$501K	0.0%	N/A	0.025%
8/15/2026	Jupiter Topco LLC	127,976	$10.42M	0.0%	N/A	0.520%
8/14/2026	Hsbc Holdings PLC	23,693	$1.94M	0.0%	N/A	0.096%
8/14/2026	PDT Partners LLC	31,176	$2.54M	0.1%	N/A	0.127%
8/14/2026	Legal & General Group Plc	58,841	$4.79M	0.0%	N/A	0.239%
8/14/2026	The Manufacturers Life Insurance Company	12,070	$982K	0.0%	N/A	0.049%
8/12/2026	Ieq Capital LLC	45,343	$3.69M	0.0%	N/A	0.184%
8/11/2026	Allworth Financial LP	1,310	$107K	0.0%	N/A	0.005%
8/11/2026	Vise Technologies Inc.	3,650	$297K	0.0%	N/A	0.015%
8/11/2026	Bell & Brown Wealth Advisors LLC	2,609	$212K	0.1%	N/A	0.011%
8/11/2026	Western Standard LLC	236,833	$19.28M	6.5%	N/A	0.962%
8/8/2026	Meeder Asset Management Inc.	438	$36K	0.0%	N/A	0.002%
8/7/2026	BlackRock Inc.	4,381,323	$356.60M	0.0%	N/A	17.788%
8/7/2026	Deutsche Bank AG	27,565	$2.24M	0.0%	N/A	0.112%
8/6/2026	Bank of New York Mellon Corp	137,261	$11.17M	0.0%	N/A	0.557%
8/6/2026	GSA Capital Partners LLP	14,271	$1.16M	0.1%	N/A	0.058%
7/10/2026	Wedge Capital Management L L P NC	20,329	$1.66M	0.0%	-5.3%	0.083%
7/8/2026	Assenagon Asset Management S.A.	272,782	$22.20M	0.0%	-44.4%	1.107%
6/3/2026	NewEdge Advisors LLC	8,625	$630K	0.0%	+32.5%	0.035%
5/19/2026	Bank of America Corp DE	290,766	$21.23M	0.0%	-9.8%	1.180%
5/19/2026	Edgestream Partners L.P.	34,226	$2.50M	0.1%	-26.3%	0.139%
5/19/2026	Janus Henderson Group PLC	133,272	$9.73M	0.0%	-11.7%	0.541%
5/18/2026	Amundi	8,875	$648K	0.0%	+71.0%	0.036%
5/18/2026	California State Teachers Retirement System	27,529	$2.01M	0.0%	+15.7%	0.112%
5/18/2026	Royal Bank of Canada	745	$55K	0.0%	-82.2%	0.003%
5/16/2026	The Manufacturers Life Insurance Company	11,203	$818K	0.0%	-3.4%	0.045%
5/16/2026	Quantinno Capital Management LP	5,606	$409K	0.0%	-23.2%	0.023%
5/15/2026	Entropy Technologies LP	19,968	$1.46M	0.1%	+33.3%	0.081%
5/14/2026	Healthcare of Ontario Pension Plan Trust Fund	61,669	$4.50M	0.0%	-9.4%	0.250%
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5/14/2026	Renaissance Technologies LLC	118,900	$8.68M	0.0%	-1.2%	0.483%
5/14/2026	Public Employees Retirement System of Ohio	687	$50K	0.0%	-96.6%	0.003%
5/14/2026	Arrowstreet Capital Limited Partnership	18,497	$1.35M	0.0%	+196.5%	0.075%
5/14/2026	Caxton Associates LLP	4,726	$345K	0.0%	N/A	0.019%
5/14/2026	Sei Investments Co.	174,121	$12.71M	0.0%	+67.9%	0.707%
5/14/2026	State of Wyoming	3,918	$286K	0.0%	+79.2%	0.016%
5/13/2026	Cetera Investment Advisers	5,315	$388K	0.0%	+9.4%	0.022%
5/13/2026	First Trust Advisors LP	12,716	$929K	0.0%	+3.6%	0.052%
5/12/2026	First Wilshire Securities Management Inc.	148,072	$10.81M	2.4%	+47.2%	0.595%
5/8/2026	PNC Financial Services Group Inc.	1,079	$79K	0.0%	-54.3%	0.004%
5/8/2026	Summit Global Investments	14,430	$1.05M	0.1%	N/A	0.058%
5/7/2026	Meeder Asset Management Inc.	438	$32K	0.0%	-87.2%	0.002%
5/7/2026	Dimensional Fund Advisors LP	1,242,089	$90.70M	0.0%	+5.7%	4.990%
5/6/2026	Allspring Global Investments Holdings LLC	2,315,942	$170.45M	0.3%	-1.7%	9.305%
5/5/2026	Bank of New York Mellon Corp	131,291	$9.59M	0.0%	-4.7%	0.527%
5/5/2026	Illinois Municipal Retirement Fund	13,861	$1.01M	0.0%	+8.6%	0.056%
5/4/2026	Principal Financial Group Inc.	120,477	$8.80M	0.0%	+2.0%	0.484%
5/1/2026	Fifth Third Bancorp	12,482	$911K	0.0%	+5,303.5%	0.050%
4/30/2026	Hsbc Holdings PLC	25,351	$1.86M	0.0%	+70.7%	0.102%
4/29/2026	R Squared Ltd	4,363	$319K	0.2%	-25.8%	0.018%
4/28/2026	Hudson Edge Investment Partners Inc.	8,373	$611K	0.1%	+94.0%	0.034%
4/27/2026	Moran Wealth Management LLC	27,031	$1.97M	0.1%	-35.7%	0.109%
4/27/2026	New York State Teachers Retirement System	8,651	$632K	0.0%	+8.7%	0.035%
4/27/2026	Y Intercept Hong Kong Ltd	33,296	$2.43M	0.0%	+35.3%	0.134%
4/25/2026	Keybank National Association OH	5,583	$408K	0.0%	-7.0%	0.022%
4/24/2026	Deprince Race & Zollo Inc.	68,029	$4.97M	0.1%	N/A	0.273%
4/24/2026	James Investment Research Inc.	3,015	$220K	0.0%	-69.7%	0.012%
4/24/2026	MQS Management LLC	3,662	$267K	0.2%	N/A	0.015%
4/23/2026	Inspire Investing LLC	7,033	$514K	0.0%	+15.6%	0.028%
4/22/2026	Pictet Asset Management Holding SA	4,708	$344K	0.0%	+16.2%	0.019%
4/22/2026	Sterling Capital Management LLC	789	$58K	0.0%	-42.3%	0.003%
4/21/2026	Louisiana State Employees Retirement System	11,000	$803K	0.0%	N/A	0.044%
4/20/2026	Assenagon Asset Management S.A.	490,884	$35.84M	0.1%	+175.5%	1.972%
4/18/2026	Leeward Investments LLC MA	69,810	$5.10M	0.3%	-2.6%	0.280%
4/16/2026	SG Americas Securities LLC	60,868	$4.45M	0.0%	-19.7%	0.245%
4/16/2026	Diversified Trust Co	5,378	$393K	0.0%	+40.7%	0.022%
3/20/2026	Hsbc Holdings PLC	14,847	$1.14M	0.0%	-1.2%	0.060%
3/17/2026	Rockefeller Capital Management L.P.	728	$56K	0.0%	+125.4%	0.003%
3/3/2026	Caitong International Asset Management Co. Ltd	662	$51K	0.0%	+316.4%	0.003%
2/19/2026	Invesco Ltd.	104,639	$8.01M	0.0%	+29.4%	0.422%
2/18/2026	Mercer Global Advisors Inc. ADV	7,535	$577K	0.0%	+19.4%	0.030%
2/18/2026	Vident Advisory LLC	8,503	$651K	0.0%	N/A	0.034%
2/18/2026	State of Tennessee Department of Treasury	10,163	$831K	0.0%	-30.2%	0.041%
2/18/2026	Mackenzie Financial Corp	2,960	$231K	0.0%	-6.2%	0.012%
2/18/2026	NewEdge Advisors LLC	6,511	$498K	0.0%	+21.4%	0.026%
2/18/2026	XTX Topco Ltd	9,737	$745K	0.0%	N/A	0.039%
2/18/2026	Voloridge Investment Management LLC	138,401	$10.59M	0.0%	+9.8%	0.559%
2/18/2026	Polymer Capital Management US LLC	3,458	$265K	0.0%	-29.6%	0.014%
2/18/2026	Quadrature Capital Ltd	5,955	$456K	0.0%	N/A	0.024%
2/18/2026	Numerai GP LLC	98,269	$7.52M	0.9%	+20.5%	0.397%
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2/18/2026	Oxford Asset Management LLP	3,632	$278K	0.1%	-30.6%	0.015%
2/18/2026	Millennium Management LLC	533,312	$40.82M	0.0%	+10.8%	2.152%
2/18/2026	Man Group plc	5,717	$438K	0.0%	+16.2%	0.023%
2/18/2026	Inspire Investing LLC	6,086	$466K	0.0%	+3.6%	0.025%
2/18/2026	Janus Henderson Group PLC	150,851	$11.55M	0.0%	-41.6%	0.609%
2/18/2026	Engineers Gate Manager LP	49,862	$3.82M	0.0%	+22.5%	0.201%
2/17/2026	Freestone Grove Partners LP	13,475	$1.03M	0.0%	+45.3%	0.054%
2/17/2026	Schonfeld Strategic Advisors LLC	17,677	$1.35M	0.0%	-30.0%	0.071%
2/17/2026	AQR Capital Management LLC	268,151	$20.52M	0.0%	+48.0%	1.082%
2/17/2026	Cetera Investment Advisers	4,859	$372K	0.0%	N/A	0.020%

IOSP Institutional Ownership - Frequently Asked Questions

During the previous two years, 287 institutional investors and hedge funds held shares of Innospec. The most heavily invested institutionals were BlackRock Inc. ($356.60M), Vanguard Group Inc. ($238.89M), Wasatch Advisors LP ($173.91M), Allspring Global Investments Holdings LLC ($170.45M), Dimensional Fund Advisors LP ($90.70M), Victory Capital Management Inc. ($72.72M), and State Street Corp ($72.64M).Learn more on Innospec's institutional investors.

96.64% of Innospec's stock is owned by institutional investors. Learn more on IOSP's institutional investor holdings.

Of the 242 institutional investors that purchased Innospec's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($4.38M), Nuveen LLC ($544.79K), Assenagon Asset Management S.A. ($506.17K), Western Standard LLC ($505.20K), Pacer Advisors Inc. ($485.71K), Financial Harvest LLC ($433.84K), and Brown Advisory Inc. ($426.54K).

Institutional investors have bought a total of 8,968,218 shares in the last 24 months. This purchase volume represents approximately $710.82M in transactions.

Of the 96 institutional investors that sold Innospec's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: First Trust Advisors LP ($790.23K), Royce & Associates LP ($322.28K), Assenagon Asset Management S.A. ($218.10K), Allspring Global Investments Holdings LLC ($167.24K), Invesco Ltd. ($142.92K), Janus Henderson Group PLC ($124.84K), and Victory Capital Management Inc. ($122.59K).

Institutional investors have sold a total of 2,837,423 shares in the last 24 months. This volume of shares sold represents approximately $218.34M in transactions.

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Institutional ownership data for NASDAQ:IOSP is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/21/2026. New 13F filings are added each quarter as they're published.

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Innospec (IOSP) Institutional Ownership

IOSP Institutional Buying and Selling by Quarter

Innospec Major Shareholders & Ownership History

IOSP Institutional Ownership - Frequently Asked Questions

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Innospec (IOSP) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Innospec (NASDAQ:IOSP)

IOSP Institutional Buying and Selling by Quarter

Innospec Major Shareholders & Ownership History

IOSP Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of IOSP shares?

What percentage of Innospec's stock is owned by institutional investors?

Which institutional investors have been buying Innospec's stock?

How much institutional buying is happening at Innospec?

Which of Innospec's major shareholders have been selling company stock?

How much institutional selling is happening at Innospec?

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