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Significant Ownership

Significant Ownership of Polaris Venture Partners VI, L.P.

Signature - Title: /s/ Lauren Crockett - Lauren Crockett/ Authorized Signatory of Polaris Venture Management Co. VI, L.L.C., general partner of Polaris Venture Partners VI, L.P.
Location: Boston, MA
Summary: This page shows a list of all the recent SCHEDULE 13D/G filings made by Polaris Venture Partners VI, L.P..

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Significant Ownership of Polaris Venture Partners VI, L.P.

Sym	Company	Class	Ownership	Holdings Value	Net Change	Nb Shares	Change %	Reporting Name	Report Period
ALEC	Alector, Inc.	Common Stock, $0.0001 par value per share	6.5%	$21M		7.1M		Terrance G. McGuire	Sep 30, 2025

Schedules 13D/G Reported by Polaris Venture Partners VI, L.P.:

Sym	Target	Class	Ownership	Change	Current Shares	Change	Value	Reporting name	Form	Report Period	Date Filed

* An asterisk sign (*) next to the price indicates that the price is likely invalid.