13F Insight
DOSSIER · 13F Holders · Q1 2026Inflation hedgeYield
IOSP

Innospec Inc

279 institutions still hold Innospec Inc as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 45768s105·279 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 6.5%
vs prior quarter
13F value held
$1.3B
53.0% inst. owned
of float
Holders
279
-11 QoQ
filers reporting
Activity
+8 / −66
+927 added · −791 reduced
this quarter
Concentration
21.40%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

279 institutions reported IOSP in Q1 2026. BlackRock, Inc. leads at 21.4% of the visible book. -11 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$283M3.9M0.00%Q1 202602
Allspring Global Investments Holdings, LLC
CIK 0001890906
$170M2.3M0.29%Q1 202603
Vanguard Portfolio Management
CIK 0002100121
$136M1.9M0.01%Q1 202604
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$91M1.2M0.02%Q1 202605
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$81M1.1M0.00%Q1 202606
STATE STREET CORP
CIK 0000093751
$70M964K0.00%Q1 202607
VICTORY CAPITAL MANAGEMENT INC
CIK 0001040188
$63M865K0.04%Q1 202608
Nuveen, LLC
CIK 0001871926
$47M643K0.01%Q1 202609
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$46M631K0.00%Q1 202610
TWO SIGMA INVESTMENTS, LP
CIK 0001179392
$43M593K0.03%Q1 202611
UBS Group AG
CIK 0001610520
$41M566K0.01%Q1 202612
GOLDMAN SACHS GROUP INC
CIK 0000886982
$36M492K0.00%Q1 202613
Assenagon Asset Management S.A.
CIK 0001546007
$36M491K0.05%Q1 202614
JPMORGAN CHASE & CO
CIK 0000019617
$31M426K0.00%Q1 202615
Qube Research & Technologies Ltd
CIK 0001729829
$30M407K0.03%Q1 202616
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
CIK 0000884546· Index
$27M366K0.00%Q1 202617
D. E. Shaw & Co., Inc.
CIK 0001009207
$24M310K0.01%Q4 202518
BROWN ADVISORY INC
CIK 0001345929
$23M306K0.03%Q4 202519
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$23M312K0.01%Q1 202620
GENDELL JEFFREY L
CIK 0001056581
$22M295K0.29%Q1 2026
Page 1 of 14
259 more holders available. Log in →