KOP · smart money activity

Who's buying Koppers Holdings Inc.?

Simcoe Capital Management, LLC (+5): amended Schedule 13D: 5.6% stake.

Smart money score14#332 of 372 stocks

Latest filingOct 22, 2026

Independent buyers1

Signal sources13D

Signals against0

KOP insider buying, 13F and 13D filings

Oct 22, 202613D stake (no activist plan)

Simcoe Capital Management, LLC (+5): Amended Schedule 13D: 5.6% stake

View the filing on SEC EDGAR ↗

Signals come from SEC filings: Form 4 (insiders, filed within 2 business days), 13F (fund holdings, up to 45 days after quarter end) and Schedule 13D (5%+ activist stakes). This page reports what the filings show; it is not investment advice.