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SEC Filing Details

Document Details

Form
144
Filing Date
Aug 7, 2026
Document Date
Aug 7, 2026
Form Description
Filed by "insiders" prior intended sale of restricted stock.
Filing Group
Other
Company
Koppers Holdings, Inc.
Issuer
Koppers Holdings Inc.

436 Seventh Avenue

Pittsburgh, PA 15219-1800

+1 412.227.2001

436 Seventh Avenue

Pittsburgh, PA 15219-1800

+1 412.227.2001
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