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% $74,744,824 -$15,805,403 2,382,495 -17% Atlas Venture Fund XI, L.P. 16 Oct 2025
DYN DYNE THERAPEUTICS, INC. COMMON STOCK, $0.0001 PAR VALUE 4% $72,275,396 5,713,470 Atlas Venture Associates XI, L.P. 30 Sep 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 Filing Date
* An asterisk sign (*) next to the price indicates that the price is likely invalid.