SC
Schedule 13D filing
Simcoe Capital Management, LLC disclosed a 5.6% stake in KOP
Simcoe Capital Management, LLC reported owning 5.6% of Koppers Holdings Inc. (KOP) (1,063,279 shares) in a Schedule 13D filed Oct 22, 2026.
A 13D means the holder may push for changes at the company.
More KOP insider and Congress trades
From a public Schedule 13D, linked above. Not investment advice, and not a recommendation to buy or sell.