Koppers Holdings Inc. — Form SCHEDULE 13D/A
Filed October 22, 2026 · analyzed by the Ownership Agent
SCHEDULE 13D/A
▼ Likely negative
significance 28/100
What the filing says
Simcoe Partners, L.P. sold 331,576 shares of Koppers Holdings common stock over 13 trading days (Oct 1-22, 2026) at prices ranging from $41.02 to $47.17 per share, totaling approximately $15.2 million. This represents a material reduction in Simcoe Partners' holdings in the company.
Why this rating
Substantial insider selling (~$15.2M = 2.5% of market cap) signals reduced confidence; however, absence of pre-filing ownership/post-filing position data limits assessment of true stake change.
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