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DIMENSIONAL FUND ADVISORS LP

Position in IOSP — Innospec Inc.

CIK 354204 AUSTIN, TX

Position in IOSP

as of Jun 30, 2026 · filed Aug 11, 2026
Position Value
$106,217,042
+$15,519,706 QoQ
Shares Held
1,305,038
+5.1% QoQ
Ownership
5.30%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#4
of 282 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 94% Shared 4% None 2%

Common Shares in IOSP Over Time

Shares Held

Position Value (USD)

Position in Specialty Chemicals

Basic Materials · as of Jun 30, 2026

DIMENSIONAL FUND ADVISORS LP holds $7,520,414,837 across 50 Specialty Chemicals names. IOSP ranks #25 (1.4% of the industry book) .

# Ticker Company Shares Value (USD) Open

All Filings in IOSP

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27 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $106,217,042 1,305,038
2026-06-30 $106,217,042 1,305,038
2026-03-31 $90,697,336 1,242,089
2025-12-31 $89,943,836 1,175,122
2025-09-30 $90,043,789 1,166,975
2025-06-30 $98,294,901 1,168,925
2025-03-31 $109,722,110 1,158,017
2024-12-31 $127,513,642 1,158,583
2024-09-30 $133,158,835 1,177,459
2024-06-30 $146,828,008 1,188,025
2024-03-31 $154,594,416 1,198,964
2023-12-31 $149,801,299 1,215,525
2023-09-30 $124,896,064 1,222,075
2023-06-30 $123,195,684 1,226,560
2023-03-31 $124,966,020 1,217,162
2022-12-31 $123,195,419 1,197,700
2022-09-30 $102,565,150 1,197,212
2022-06-30 $114,088,858 1,191,031
2022-03-31 $108,189,654 1,168,986
2021-12-31 $104,527,264 1,157,043
2021-09-30 $98,179,212 1,165,747
2021-06-30 $106,488,858 1,175,244
2021-03-31 $122,020,057 1,188,237
2020-12-31 $112,298,879 1,237,726
2020-09-30 $84,090,732 1,328,028
2020-06-30 $107,215,815 1,387,907
2020-03-31 $96,413,900 1,387,450