PZENA INVESTMENT MANAGEMENT LLC

Position in OEC — Orion S.A.

CIK 1027796 NEW YORK, NY

Position in OEC

as of Jun 30, 2026 · filed Aug 7, 2026 Compact

Position Value

$31,638,154

+$1,738,759 QoQ

Shares Held

4,771,969

+3.7% QoQ

Ownership

8.44%

of shares outstanding

% of Portfolio

0.09%

of 13F equity value

Holder Rank

of 187 holders

Holding Since

Jun 2020

25 quarters on record

Voting authority Sole 84% Shared 0% None 16%

Basic Materials · as of Jun 30, 2026

PZENA INVESTMENT MANAGEMENT LLC holds $1,026,254,004 across 3 Specialty Chemicals names. OEC ranks #3 (3.1% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	PPG	Ppg Industries Inc	7,807,438	$946,964,154
2	KOP	Koppers Holdings Inc.	1,061,285	$47,651,696
3	OEC	Orion S.A. This page	4,771,969	$31,638,154

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$31,638,154	4,771,969	+3.7%	Shares	Sole	2026-08-07
2026-03-31	$29,899,395	4,599,907	+0.4%	Shares	Sole	2026-04-24
2025-12-31	$24,196,106	4,582,596	-2.4%	Shares	Sole	2026-02-06
2025-09-30	$35,586,773	4,694,825	+2.6%	Shares	Sole	2025-11-07
2025-06-30	$48,014,796	4,577,197	+37.5%	Shares	Sole	2025-07-25
2025-03-31	$43,042,702	3,328,902	+0.5%	Shares	Sole	2025-05-02
2024-12-31	$52,301,059	3,312,290	-9.2%	Shares	Sole	2025-02-07
2024-09-30	$64,970,612	3,647,985	+35.4%	Shares	Sole	2024-11-08
2024-06-30	$59,097,298	2,693,587	-6.1%	Shares	Sole	2024-08-02
2024-03-31	$67,466,955	2,868,493	-5.7%	Shares	Sole	2024-05-03
2023-12-31	$84,317,252	3,040,651	-7.4%	Shares	Sole	2024-02-09
2023-09-30	$69,901,033	3,284,823	+5.5%	Shares	Sole	2023-11-09
2023-06-30	$66,057,626	3,112,989	-12.8%	Shares	Sole	2023-08-04
2023-03-31	$93,125,959	3,569,412	-17.8%	Shares	Sole	2023-05-12
2022-12-31	$77,358,750	4,343,557	-4.3%	Shares	Sole	2023-02-03
2022-09-30	$60,573,128	4,537,313	+21.3%	Shares	Sole	2022-11-14
2022-06-30	$58,103,755	3,741,388	+0.8%	Shares	Sole	2022-08-05
2022-03-31	$59,275,992	3,711,709	+9.3%	Shares	Sole	2022-05-06
2021-12-31	$62,346,263	3,395,766	+18.4%	Shares	Sole	2022-02-04
2021-09-30	$52,291,405	2,868,426	+13.6%	Shares	Sole	2021-11-05
2021-06-30	$47,970,031	2,526,068	+1.1%	Shares	Sole	2021-08-06
2021-03-31	$49,276,888	2,498,828	+30.9%	Shares	Sole	2021-05-07
2020-12-31	$32,726,481	1,909,363	+11.5%	Shares	Sole	2021-02-05
2020-09-30	$21,418,833	1,712,137	+29.2%	Shares	Sole	2020-10-30
2020-06-30	$14,034,249	1,325,236	—	Shares	Sole	2020-07-31
No filing history on record for this holder in this stock.