Innospec

IOSP • NASDAQ

Innospec is a chemicals - specialty company in the basic materials sector on NASDAQ, led by Patrick S. Williams, with a market cap of $1.9B. As of Q3 2025, 96% of shares are held by 260 institutional investors, with BlackRock, Inc. as the largest holder at 14.63%.

President and Chief Executive OfficerPatrick S. Williams

Market Cap$1.9B

Chemicals - Specialty

Basic Materials

Employees2.4K

Websiteinnospecinc.com

Country

United States of America

Overview

Overview of institutional ownership in IOSP as of Q3 2025 with a market cap of $1.9B

All Institutions

Institutions: 260
Value Held: $1.8B
Shares Held: 24.0M
Avg Position: $7.1M
Median Position: $681.7K

Hedge Funds

Hedge Funds: 44
Value Held: $191.7M
Shares Held: 2.5M
Avg Position: $4.4M
Median Position: $1.9M

Ownership Breakdown

Institutional (non-HF)

86.42%

$1.7B

Hedge Funds

10.01%

$191.7M

Retail & Other

3.57%

$68.4M

Based on market cap of $1.9B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in IOSP as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
B BlackRock, Inc. Institution	-	$280.3M 0.00% of portfolio	14.63% 3.6M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$242.5M 0.00% of portfolio	12.66% 3.1M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
Allspring Global Investments Holdings, LLC Long Only Manager	Francis Jon Baranko President	$183.8M 0.30% of portfolio	9.63% 2.4M shares	Q4 2021 Held for 3y 11m	$61.5B
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$90.0M 0.02% of portfolio	4.70% 1.2M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$71.7M 0.00% of portfolio	3.74% 929.1K shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
VICTORY CAPITAL MANAGEMENT INC Long Only Manager	David Craig Brown CEO	$64.5M 0.04% of portfolio	3.37% 835.9K shares	Q1 2019 Held for 6y 8m	$158.22B
FIRST TRUST ADVISORS LP ETF Provider	James Allen Bowen CEO	$49.4M 0.04% of portfolio	2.58% 640.6K shares	Q4 2015 Held for 9y 11m	$134.11B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$47.4M 0.00% of portfolio	2.47% 614.2K shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
R ROYCE & ASSOCIATES LLC Institution	-	$38.0M 0.38% of portfolio	1.98% 492.6K shares	≤ Q2 2013 Held for 12y 5m+	$10.0B
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	Dan Michael Berkovitz Chairman	$37.2M 0.03% of portfolio	1.94% 481.5K shares	Q2 2021 Held for 4y 5m	$121.98B

Net Capital Flow

Institutional buying and selling activity for IOSP in Q3 2025

Traded: +$3.0M
Buyers: 140
Sellers: 117
Total Bought: +$163.4M
Total Sold: −$160.4M
Avg Position: $6.4M

Biggest Buyers

Institution	Net Bought	Current Position
M Medina Singh Partners, LLC Hedge Fund•Value	+$18.2M +236.0K shares	$18.2M 236.0K shares
GOLDMAN SACHS GROUP INC Institution	+$13.7M +178.0K shares	$21.8M 282.6K shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$10.1M +131.5K shares	$37.2M 481.5K shares
N Nuveen, LLC Institution	+$8.9M +115.3K shares	$31.7M 411.3K shares
Walleye Trading Advisors, LLC Hedge Fund•Multi-Strategy	+$8.5M +110.7K shares	$11.6M 150.8K shares
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	+$8.4M +109.2K shares	$14.0M 181.2K shares
A Assenagon Asset Management S.A. Institution	+$8.4M +108.3K shares	$10.0M 129.4K shares
D D. E. Shaw & Co., Inc. Institution	+$7.9M +102.2K shares	$21.1M 273.9K shares
G GENDELL JEFFREY L Institution	+$7.3M +95.2K shares	$13.5M 174.9K shares
BANK OF AMERICA CORP /DE/ Institution	+$6.2M +79.8K shares	$29.0M 375.3K shares

Biggest Sellers

Institution	Net Sold	Current Position
FIRST TRUST ADVISORS LP ETF Provider	−$12.5M −161.9K shares	$49.4M 640.6K shares
Invesco Ltd. ETF Provider	−$11.0M −142.9K shares	$6.2M 80.8K shares
R ROYCE & ASSOCIATES LLC Institution	−$10.4M −134.9K shares	$38.0M 492.6K shares
SEGALL BRYANT & HAMILL Long Only Manager	−$9.9M −118.2K shares	Sold Off 0 shares
VICTORY CAPITAL MANAGEMENT INC Long Only Manager	−$9.5M −122.6K shares	$64.5M 835.9K shares
ING INVESTMENT MANAGEMENT LLC Insurance Manager	−$8.3M −107.1K shares	$3.1M 40.2K shares
GEODE CAPITAL MANAGEMENT LLC ETF Provider	−$8.1M −105.4K shares	$47.4M 614.2K shares
Allspring Global Investments Holdings, LLC Long Only Manager	−$7.0M −91.4K shares	$183.8M 2.4M shares
RAYMOND JAMES FINANCIAL INC RIA/Wealth	−$5.9M −70.7K shares	Sold Off 0 shares
B BROWN ADVISORY INC RIA/Wealth	−$5.9M −76.6K shares	$27.0M 350.0K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited IOSP in Q3 2025

New Positions: 12
New Value: $21.6M
Exited Positions: 25
Exited Value: $30.9M

New Positions

Institution	Position Value
M Medina Singh Partners, LLC Hedge Fund•Value	$18.2M 236.0K shares
Western Standard, LLC Hedge Fund•Long/Short	$2.1M 27.0K shares
Semanteon Capital Management, LP Hedge Fund•Long/Short	$565.1K 7.3K shares
MERCER GLOBAL ADVISORS INC /ADV RIA/Wealth	$486.8K 6.3K shares
F Farringdon Capital, Ltd. Institution	$211.9K 2.7K shares
S Salomon & Ludwin, LLC Institution	$3.8K 48.0 shares
R Root Financial Partners, LLC RIA/Wealth	$3.5K 45.0 shares
Sunbelt Securities, Inc. RIA/Wealth	$849.0 11.0 shares
FIRST HORIZON NATIONAL CORP RIA/Wealth	$694.0 9.0 shares
Sontag Advisory, LLC RIA/Wealth	$617.0 8.0 shares

Exited Positions

Institution	Previous Position
SEGALL BRYANT & HAMILL Long Only Manager	$9.9M 118.2K shares
RAYMOND JAMES FINANCIAL INC RIA/Wealth	$5.9M 70.7K shares
KIRR MARBACH & CO LLC /IN/ Long Only Manager	$4.6M 54.3K shares
C Campbell & CO Investment Adviser LLC Hedge Fund•Quant Macro	$2.2M 26.0K shares
B BRIDGEWAY CAPITAL MANAGEMENT INC Long Only Manager	$1.8M 21.9K shares
T TEXAS PERMANENT SCHOOL FUND Institution	$1.5M 18.3K shares
Pathstone Holdings, LLC Family Office	$883.7K 10.5K shares
X XTX Topco Ltd Institution	$676.0K 8.0K shares
Savant Capital, LLC RIA/Wealth	$621.2K 7.4K shares
A AXQ CAPITAL, LP Hedge Fund•Market Neutral	$567.7K 6.8K shares

Options Activity

Institutions with the largest Call and Put options positions in IOSP as of Q3 2025

Call Positions: 1
Call Value: $11.6M
Put Positions: 1
Put Value: $308.6K

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$11.6M 1.5K contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$308.6K 40.0 contracts

Most Committed Institutions

Institutions with IOSP as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
M Medina Singh Partners, LLC Hedge Fund•Value	Kristofer Lee Medina Managing Partner	4.25% $18.2M	0.95% 236.0K shares	Q3 2025 Held for 2 months	$428.0M
Western Standard, LLC Hedge Fund•Long/Short	Eric David Andersen Managing Partner	1.11% $2.1M	0.11% 27.0K shares	Q3 2025 Held for 2 months	$187.0M
Q QSV Equity Investors LLC Institution	-	0.96% $938.7K	0.05% 12.2K shares	Q4 2023 Held for 1y 11m	$97.9M
Numerai GP LLC Hedge Fund•Quant	Richard Malone Craib CEO	0.89% $6.3M	0.33% 81.5K shares	Q2 2025 Held for 5 months	$707.9M
C CM Management, LLC Institution	-	0.77% $925.9K	0.05% 12.0K shares	Q2 2025 Held for 5 months	$119.9M
Semanteon Capital Management, LP Hedge Fund•Long/Short	Rajat Lal Managing Partner	0.71% $565.1K	0.03% 7.3K shares	Q3 2025 Held for 2 months	$79.7M
Round Hill Asset Management RIA/Wealth	Channing Turner Lushbough President	0.60% $923.9K	0.05% 12.0K shares	Q4 2016 Held for 8y 11m	$154.6M
R ROYCE & ASSOCIATES LLC Institution	-	0.38% $38.0M	1.98% 492.6K shares	≤ Q2 2013 Held for 12y 5m+	$10.0B
E EntryPoint Capital, LLC Hedge Fund•Long/Short	Lawrence Edward Leibowitz CEO	0.32% $824.5K	0.04% 10.7K shares	Q1 2024 Held for 1y 8m	$258.4M
Allspring Global Investments Holdings, LLC Long Only Manager	Francis Jon Baranko President	0.30% $183.8M	9.63% 2.4M shares	Q4 2021 Held for 3y 11m	$61.5B

Hedge Fund Spotlight

Discover hedge funds investing in IOSP

MQS Management LLC

Hedge Fund • Global Macro

Portfolio ManagerRobert Yale Gelfond

Portfolio Value: $171.4M
Positions: 404
Last Reported: Q3 2025

Sector Allocation

Position in Innospec

Market Value: $227.9K
Shares Held: 3.0K
Portfolio Weight: 0.13%
Owned Since: 2025-Q2

Top Holding	Sector	Market Value	Weight
1 Kimco Realty KIM	REIT - Retail Real Estate	$1.3M	0.77%
2 Hilton Worldwide HLT	Travel Lodging Consumer Cyclical	$1.2M	0.71%
3 Schlumberger SLB	Oil & Gas Equipment & Services Energy	$1.2M	0.70%