Insider Trading & Ownership of MCGUIRE TERRANCE

Location: Waltham, MA
Summary: The estimated value of insider holdings of MCGUIRE TERRANCE is at least $72,605,682 dollars as of 11 Dec 2025. MCGUIRE TERRANCE is the Director, 10%+ Owner of Alector, Inc. and owns shares of Alector, Inc. (ALEC) stock worth about $60.65M. MCGUIRE TERRANCE is the Director of Tectonic Therapeutic, Inc. and owns shares of Tectonic Therapeutic, Inc. (TECX) stock worth about $9.8M. MCGUIRE TERRANCE is the Director of Invivyd, Inc. and owns shares of Invivyd, Inc. (IVVD) stock worth about $1.37M. MCGUIRE TERRANCE is the Director of Seer, Inc. and owns shares of Seer, Inc. (SEER) stock worth about $644.5K. MCGUIRE TERRANCE is the Director of Cyclerion Therapeutics, Inc. and owns shares of Cyclerion Therapeutics, Inc. (CYCN) stock worth about $142.6K.
Signature: /s/ David Horn, by power of attorney
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Ownership of MCGUIRE TERRANCE

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
ALEC	Alector, Inc.	Director, 10%+ Owner	$60,653,001			11 Sep 2023
TECX	Tectonic Therapeutic, Inc.	Director	$9,799,360	-$8,550,000	-47%	09 Jun 2025
IVVD	Invivyd, Inc.	Director	$1,366,240			20 May 2025
SEER	Seer, Inc.	Director	$644,457			09 Dec 2025
CYCN	Cyclerion Therapeutics, Inc.	Director	$142,624			30 Nov 2023

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.