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Insider Trading & Ownership of SONJA MICHELLE WILKERSON

Summary
The estimated net worth of SONJA MICHELLE WILKERSON is at least $886,490 dollars as of 17 Dec 2025. SONJA MICHELLE WILKERSON is the Director of Koppers Holdings Inc. and owns shares of Koppers Holdings Inc. (KOP) stock worth about $886.5K.
Signature
/s/ Stephanie L. Apostolou, Attorney in Fact
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Ownership of SONJA MICHELLE WILKERSON

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
KOP Koppers Holdings Inc. Director $886,490 16 Dec 2025

Insider Transactions Reported by SONJA MICHELLE WILKERSON:

Sym Company Class Transaction % Value $ * Price $ Shares Shares After Date Ownership
* An asterisk sign (*) next to the price indicates that the price is likely invalid.