Insider Trading & Ownership of Bruce Booth

Location: Waltham, MA
Summary: The estimated net worth of Bruce Booth is at least $172M dollars as of 12 Dec 2025. Bruce Booth is the Director of Sionna Therapeutics, Inc. and owns shares of Sionna Therapeutics, Inc. (SION) stock worth about $109M. Bruce Booth is the Director of Kymera Therapeutics, Inc. and owns shares of Kymera Therapeutics, Inc. (KYMR) stock worth about $62.4M. Bruce Booth is the Director of Vigil Neuroscience, Inc. and owns shares of Vigil Neuroscience, Inc. (VIGL) stock worth about $138K.
Signature: /s/ Ommer Chohan, Attorney-in-Fact
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Ownership of Bruce Booth

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
SION	Sionna Therapeutics, Inc.	Director	$109M	-$22.1M	-16.8%	21 Oct 2025
KYMR	Kymera Therapeutics, Inc.	Director	$62.4M	-$21.7M	-25.8%	10 Dec 2025
VIGL	Vigil Neuroscience, Inc.	Director	$138K			05 Aug 2025
TECX	Tectonic Therapeutic, Inc.	Director				06 Jun 2023
DNTH	Dianthus Therapeutics, Inc. /DE/	Director				28 Jun 2022

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.