Third Rock Ventures VI, L.P. - Insider Trading & Ownership

Location: 29 Newbury Street, 3 Rd Floor, Boston, MA
Summary: The estimated value of insider holdings of Third Rock Ventures VI, L.P. is at least $64.2M dollars as of February 26, 2025. Third Rock Ventures VI, L.P. is the 10%+ Owner of Septerna, Inc. and owns shares of Septerna, Inc. (SEPN) stock worth about $62.6M. Third Rock Ventures VI, L.P. is the Director of Tango Therapeutics, Inc. and owns shares of Tango Therapeutics, Inc. (TNGX) stock worth about $1.63M.
Signature: /s/ Kevin Gillis, Chief Operating Officer of TRV GP V, LLC, general partner of Third Rock Ventures GP V, L.P., general partner of Third Rock Ventures V, L.P.
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Ownership of Third Rock Ventures VI, L.P.

Symbol	Company	Relationship	Holdings Value	Past Year Net Change	Change %	Report Period
SEPN	Septerna, Inc.	10%+ Owner	$62.6M	+$6.28M	+11.2%	Feb 24, 2025
TNGX	Tango Therapeutics, Inc.	Director	$1.63M			Aug 11, 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.