INNOSPEC INC (IOSP) is held by 140 institutional investors that disclose positions via SEC 13F filings. The largest disclosed holder is BlackRock, Inc. as of Q1 2026.

Are institutions buying or selling IOSP?

In Q1 2026, 83 institutions opened or increased positions in INNOSPEC INC while 59 reduced or exited — a net buying quarter.

What is the Smart Money Verdict on IOSP?

The Smart Money Verdict combines four independent sources (institutional 13F activity, insider trades, activist filings, and congressional trades) into a single assessment for INNOSPEC INC.

How many hedge funds hold IOSP?

140 institutional investors report holding INNOSPEC INC (IOSP) as of Q1 2026, based on SEC 13F filings.

Is institutional money flowing into IOSP?

As of Q1 2026, tracked institutions in INNOSPEC INC show 83 buyers versus 59 sellers — net inflows.

Are Congress members and hedge funds both buying IOSP?

Yes — in the latest quarter, 1 members of Congress and 83 institutional investors bought INNOSPEC INC. HoldingsIntel cross-checks STOCK Act disclosures against 13F filings to surface these overlaps.

INNOSPEC INC

IOSP·45768S105·US·Common Stock·Basic Materials - Specialty Chemicals-13D/G

140

Holders

Avg rating(30 Elite)

$1.7B

Total Value

58% (152)

Fund Consensus

83 buying - 59 selling

Smart Money Verdict

View all

Held by 140 funds

30 elite

Who's Trading

Activist

Dimensional Fund Advisors LP5.3%Jul 14, 2026

ActivistVAVanguard Capital Management5.2%Apr 30, 2026

InsiderCICleminson IanSell $88KFeb 27, 2026

InsiderCICleminson IanSell $95KFeb 27, 2026

InsiderBCBlackmore Milton CSell $22KFeb 27, 2026

InsiderBCBlackmore Milton CSell $24KFeb 27, 2026

Congress

Donald J. TrumpBuy $15,001 - $50,000Dec 26, 2025

Congress

Donald J. TrumpSale $100,001 - $250,000Nov 24, 2025

Congress

Donald J. TrumpBuy $100,001 - $250,000Oct 23, 2025

Congress

Donald J. TrumpSale $15,001 - $50,000Sep 22, 2025

View all insider trades View all activist filings View all congressional trades

13F: Mar 31, 2026Insider & Congress: Updated regularly

Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
BlackRock, Inc.	Increased	3.9M(+5.9%)	$283.2M	0.0%	-22.75%	33
Allspring Global Investments Holdings, LLC	Decreased	2.3M(-1.7%)	$170.5M	0.3%	-5.78%	0
VPVANGUARD PORTFOLIO MANAGEMENT LLC	New	1.9M	$135.8M	0.0%	+6.87%	42
DIMENSIONAL FUND ADVISORS LP	Increased	1.2M(+5.7%)	$90.7M	0.0%	-14.04%	32
VAVANGUARD CAPITAL MANAGEMENT LLC	New	1.1M	$81.4M	0.0%	+6.87%	41
STATE STREET CORP	Increased	964,335(+1.6%)	$70.4M	0.0%	-30.29%	30
VICTORY CAPITAL MANAGEMENT INC	Decreased	864,994(-9.0%)	$63.2M	0.0%	-7.80%	0
Nuveen, LLC	Increased	643,248(+28.0%)	$47M	0.0%	-3.19%	36
GEODE CAPITAL MANAGEMENT, LLC	Increased	630,592(+3.5%)	$46.1M	0.0%	-0.18%	30
TWO SIGMA INVESTMENTS, LP	Increased	593,039(+271.8%)	$43.3M	0.0%	+2.24%	47
UBS Group AG	Increased	565,911(+298.4%)	$41.3M	0.0%	+1.04%	47
GOLDMAN SACHS GROUP INC	Increased	492,011(+1.4%)	$35.9M	0.0%	-2.22%	29
Assenagon Asset Management S.A.	Increased	490,884(+175.5%)	$35.8M	0.1%	-0.55%	47
JPMORGAN CHASE & CO	Increased	426,050(+39.3%)	$31.2M	0.0%	-15.14%	38
Qube Research & Technologies Ltd	Increased	406,624(+26.9%)	$29.7M	0.0%	-9.19%	36
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Decreased	365,874(-2.0%)	$26.7M	0.0%	+7.80%	0
AQR CAPITAL MANAGEMENT LLC	Increased	312,065(+16.4%)	$22.8M	0.0%	+3.23%	33
BROWN ADVISORY INC	Decreased	296,465(-3.1%)	$21.6M	0.0%	-10.22%	0
BANK OF AMERICA CORP /DE/	Decreased	290,766(-9.8%)	$21.2M	0.0%	-16.00%	0
DED. E. Shaw & Co., Inc.	Decreased	286,794(-7.5%)	$20.9M	0.0%	-3.82%	0