PDT Partners, LLC

Position in IOSP — Innospec Inc.

CIK 1564702 New York, NY

Position in IOSP

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$2,524,739

-$756,990 QoQ

Shares Held

34,576

-19.4% QoQ

Ownership

0.140%

of shares outstanding

% of Portfolio

0.15%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2020

11 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Basic Materials · as of Mar 31, 2026

PDT Partners, LLC holds $55,332,634 across 10 Specialty Chemicals names. IOSP ranks #6 (4.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ALB	Albemarle Corp	80,551	$14,461,321
2	LYB	LyondellBasell Industries N.V.	132,400	$10,666,144
3	SOLS	Solstice Advanced Materials Inc.	137,319	$10,458,215
4	WLK	Westlake Corp	75,777	$8,852,269
5	SCL	Stepan Co	54,115	$2,704,667
6	IOSP	Innospec Inc. This page	34,576	$2,524,739
7	ODC	Oil-Dri Corp of America	32,805	$2,135,277
8	MATV	Mativ Holdings, Inc.	238,712	$2,076,794

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$2,524,739	34,576	-19.4%	Shares	Sole	2026-05-15
2025-12-31	$3,281,729	42,876	0.0%	Shares	Sole	2026-02-17
2025-09-30	$3,308,312	42,876	+218.9%	Shares	Sole	2025-11-17
2025-06-30	$1,130,421	13,443	+96.1%	Shares	Sole	2025-08-14
2024-09-30	$775,118	6,854	-55.8%	Shares	Sole	2024-11-14
2024-06-30	$1,915,521	15,499	+17.7%	Shares	Sole	2024-08-15
2024-03-31	$1,697,624	13,166	+17.1%	Shares	Sole	2024-05-15
2023-12-31	$1,385,833	11,245	+1.0%	Shares	Sole	2024-02-14
2023-09-30	$1,137,997	11,135	-0.2%	Shares	Sole	2023-11-14
2023-06-30	$1,120,609	11,157	+225.6%	Shares	Sole	2023-08-14
2020-06-30	$264,735	3,427	—	Shares	Sole	2020-08-14
No filing history on record for this holder in this stock.