Info
Insider Ownership

Insider Trading & Ownership of William C. Kirby

Location: Lexington, MA
Summary: The estimated net worth of William C. Kirby is at least $2,022,464 dollars as of 27 Feb 2026. William C. Kirby is the Director of CABOT CORP and owns shares of CABOT CORP (CBT) stock worth about $1.84M. William C. Kirby is the Director of TAIWAN FUND INC and owns shares of TAIWAN FUND INC (TWN) stock worth about $187.3K.
Signature: /s/ William C. Kirby
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Ownership of William C. Kirby

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
CBT	CABOT CORP	Director	$1,835,163			08 Jan 2026
TWN	TAIWAN FUND INC	Director	$187,301	+$3,289,580		26 Feb 2026

Insider Transactions Reported by William C. Kirby:

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.