Recent News

• 05.20.2026 - BASF signs agreement to sell silicates business, including assets in Düsseldorf, to PQ
• 05.04.2026 - PQ Named Responsible Care® Member Company of the Year by the American Chemistry Council
• 02.06.2026 - PQ Honored as Supplier of the Year by Nouryon — Reinforcing Commitment to Customer Focus and Partnership Excellence

Recent Filings

• 05.08.2026 - SCHEDULE 13G/A Statement of Beneficial Ownership by Certain Investors
• 05.05.2026 - 10-Q Quarterly report [Sections 13 or 15(d)]
• 05.05.2026 - 8-K Current report
• 05.05.2026 - EX-99.1 EX-99.1
• 05.04.2026 - 8-K Current report
• 04.29.2026 - SCHEDULE 13G Statement of Beneficial Ownership by Certain Investors
• 04.24.2026 - SCHEDULE 13G/A Statement of Beneficial Ownership by Certain Investors
• 04.15.2026 - ARS Annual Report to Security Holders
• 04.15.2026 - DEF 14A Other definitive proxy statements
• 03.26.2026 - SCHEDULE 13G/A Statement of Beneficial Ownership by Certain Investors