Insider Trading & Ownership of M. Leroy Ball

Location: Pittsburgh, PA
Summary: The estimated net worth of M. Leroy Ball is at least $20,825,709 dollars as of 18 Mar 2026. M. Leroy Ball is the CEO, Director of Koppers Holdings Inc. and owns shares of Koppers Holdings Inc. (KOP) stock worth about $16.62M. M. Leroy Ball is the Director of ATI INC and owns shares of ATI INC (ATI) stock worth about $4.21M.
Signature: /s/ Stephanie L. Apostolou, Attorney in Fact
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Ownership of M. Leroy Ball

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
KOP	Koppers Holdings Inc.	CEO, Director	$16,618,700	-$400,344	-2.4%	17 Mar 2026
ATI	ATI INC	Director	$4,207,009			19 Nov 2025

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.