ActivistActivist / 5%+ stake disclosed (SCHEDULE 13D)
- Sector
- Materials
- Industry
- Lumber & Wood Products (No Furniture)
- Exchange
- NYSE
- State of incorporation
- PA
- Form
- SCHEDULE 13D
- Filed
- May 19, 2026
Filings & documents
Every entry traces to SEC EDGAR. The Information Statement is the primary source; the links below open the full filing and each company's complete filing history.
Source filing ↗SCHEDULE 13D · the filing we parseAll documents in this filing ↗accession 0000921895-26-001441Koppers Holdings Inc. — all SEC filings ↗EDGAR company pageSimcoe Capital Management, LLC — 8-K announcements ↗where the spin-off was announcedSimcoe Capital Management, LLC — all SEC filings ↗parent EDGAR company page
Spot an error in this record? Report it. Every correction is verified against the source filing before we change anything.