PDT Partners, LLC

Position in IOSP — Innospec Inc.

CIK 1564702 New York, NY

Position in IOSP

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$2,537,414

+$12,675 QoQ

Shares Held

31,176

-9.8% QoQ

Ownership

0.127%

of shares outstanding

% of Portfolio

0.13%

of 13F equity value

Holder Rank

#75

of 282 holders

Holding Since

Jun 2020

12 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Basic Materials · as of Jun 30, 2026

PDT Partners, LLC holds $54,586,271 across 12 Specialty Chemicals names. IOSP ranks #7 (4.6% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	SOLS	Solstice Advanced Materials Inc.	168,082	$14,892,065
2	LYB	LyondellBasell Industries N.V.	220,439	$11,606,113
3	ALB	Albemarle Corp	72,251	$9,756,052
4	WLK	Westlake Corp	75,777	$5,531,721
5	ODC	Oil-Dri Corp of America	32,805	$3,352,999
6	SCL	Stepan Co	48,126	$2,681,580
7	IOSP	Innospec Inc. This page	31,176	$2,537,414
8	MATV	Mativ Holdings, Inc.	202,098	$1,529,881

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$2,537,414	31,176	-9.8%	Shares	Sole	2026-08-14
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.