Koppers Holdings Inc.

Koppers Holdings Inc. (KOP) — Form SCHEDULE 13G: Ownership over 5% (passive)

SC 13GKOPFiled Oct 30, 2026, 8:03 AM ET

About this filing

Koppers Holdings Inc. (KOP) filed Form SCHEDULE 13G (ownership over 5% (passive)) with the SEC on Oct 30, 2026. A Schedule 13G reports a passive investor owning more than 5% of the company.

View original filing on SEC.gov

Key facts

Document: —

More KOP filings

10-Q
Quarterly report
Filed Nov 6, 2026
8-K
Current report
Filed Nov 6, 2026
SC 13D/A
Ownership over 5% (active) (amendment)
Filed Oct 22, 2026
SC 13G/A
Ownership over 5% (passive) (amendment)
Filed Oct 19, 2026
SC 13G/A
Ownership over 5% (passive) (amendment)
Filed Oct 8, 2026
4
Insider transaction
Filed Sep 15, 2026

Not investment advice. Summaries can contain errors; the SEC filing is the official record.