Insider Trading & Ownership of Third Rock Ventures IV, L.P.

Location
Boston, MA
Summary
The estimated value of insider holdings of Third Rock Ventures IV, L.P. is at least $313M dollars as of November 5, 2025. Third Rock Ventures IV, L.P. is the 10%+ Owner of Maze Therapeutics, Inc. and owns shares of Maze Therapeutics, Inc. (MAZE) stock worth about $141M. Third Rock Ventures IV, L.P. is the 10%+ Owner of Tango Therapeutics, Inc. and owns shares of Tango Therapeutics, Inc. (TNGX) stock worth about $136M. Third Rock Ventures IV, L.P. is the 10%+ Owner of Magenta Therapeutics, Inc. and owns shares of Dianthus Therapeutics, Inc. /DE/ (DNTH) stock worth about $36.7M.
Signature
/s/ Kevin Gillis, Chief Operating Officer of TRV GP IV, LLC, general partner of Third Rock Ventures GP IV, L.P., general partner of Third Rock Ventures IV, L.P.
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Ownership of Third Rock Ventures IV, L.P.

Symbol Company Relationship Holdings Value Past Year Net Change Change % Report Period
MAZE Maze Therapeutics, Inc. 10%+ Owner $141M Nov 4, 2025
TNGX Tango Therapeutics, Inc. 10%+ Owner $136M -$26.4M -16.2% Oct 23, 2025
DNTH Dianthus Therapeutics, Inc. /DE/ 10%+ Owner $36.7M Feb 7, 2023

Insider Transactions Reported by Third Rock Ventures IV, L.P.:

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.