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

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

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

Sym Company Class Ownership Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
IRON DISC MEDICINE, INC. Common Stock, $0.0001 par value per share 2.2% $73,469,638 -$24,517,376 813,167 -25% Atlas Venture Fund X, L.P. 12 Dec 2025
IKNA IMAGENEBIO, INC. Common Stock, $0.001 par value per share 2.1% 241,800 Atlas Venture Fund X, L.P. 25 Jul 2025

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