Significant Ownership of Atlas Venture Fund XI, L.P.

Signature - Title
/s/ Ommer Chohan - Atlas Venture Associates XI, L.P., its GP, By Atlas Venture Associates XI, LLC, its GP, By: Ommer Chohan, CFO
Location
Cambridge, MA
Summary
This page shows a list of all the recent SCHEDULE 13D/G filings made by Atlas Venture Fund XI, L.P..

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Significant Ownership of Atlas Venture Fund XI, L.P.

Sym Company Class Ownership Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
SION SIONNA THERAPEUTICS, INC. Common Stock 5.4% $74.7M -$15.8M 2.38M -17.5% Atlas Venture Fund XI, L.P. Oct 16, 2025
DYN DYNE THERAPEUTICS, INC. COMMON STOCK, $0.0001 PAR VALUE 4% $72.3M 5.71M Atlas Venture Associates XI, L.P. Sep 30, 2025

Schedules 13D/G Reported by Atlas Venture Fund XI, 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.