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RHUMBLINE ADVISERS

Position in IOSP — Innospec Inc.

CIK 1115418 BOSTON, MA

Position in IOSP

as of Mar 31, 2026 · filed May 12, 2026
Position Value
$5,195,884
-$176,994 QoQ
Shares Held
71,157
+1.4% QoQ
Ownership
0.289%
of shares outstanding
% of Portfolio
0.00%
of 13F equity value
Holder Rank
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority Sole 45.284371179223406.ToString("F0")% Shared 0.ToString("F0")% None 54.715628820776594.ToString("F0")%

Common Shares in IOSP Over Time

Shares Held

Position Value (USD)

Position in Specialty Chemicals

Basic Materials · as of Mar 31, 2026

RHUMBLINE ADVISERS holds $1,308,961,619 across 46 Specialty Chemicals names. IOSP ranks #28 (0.4% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in IOSP

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25 filing rows on record
Report Date Value (USD) Shares
2026-03-31 $5,195,884 71,157
2025-12-31 $5,372,878 70,197
2025-09-30 $5,593,174 72,488
2025-06-30 $6,851,737 81,481
2025-03-31 $7,367,760 77,760
2024-12-31 $7,831,649 71,158
2024-09-30 $8,050,764 71,189
2024-06-30 $9,129,964 73,873
2024-03-31 $9,557,806 74,126
2023-12-31 $9,290,570 75,386
2023-09-30 $7,645,786 74,812
2023-06-30 $7,638,863 76,054
2023-03-31 $7,857,951 76,536
2022-12-31 $7,352,432 71,480
2022-09-30 $6,378,816 74,458
2022-06-30 $6,785,476 70,837
2022-03-31 $6,529,124 70,547
2021-12-31 $6,260,200 69,296
2021-09-30 $5,722,580 67,948
2021-06-30 $7,020,190 77,477
2021-03-31 $7,731,119 75,286
2020-12-31 $6,729,171 74,167
2020-09-30 $4,554,544 71,929
2020-06-30 $5,871,849 76,011
2020-03-31 $5,701,932 82,054