Private company
Atlas Venture Fund IX, L.P.
American company, incorporated in Delaware. Summary from the record
Last updated Oct 21, 2026.
Overview
- HeadquartersDE1
Corporate structure
Atlas Venture Fund IX, L.P. sits at the top of its group. 4 entities, 1 country on record. Switch between the flow chart and the network, and select any entity to see its details.
- Atlas Venture Fund IX, L.P. DE
- Cogent Biosciences, Inc. Stake · Waltham, Massachusetts
- Spero Therapeutics, Inc. Stake · Cambridge, Massachusetts, United States
- Surface Oncology, Inc. Stake · Cambridge, Massachusetts, United States
Built from major holders from Schedules 13D and 13G; stakes of 5% or more it reported on Schedules 13D and 13G (3 companies). Each entity in the chart links to its source.
Stakes it holds
Atlas Venture Fund IX, L.P. has told the SEC it owns more than 5% of 3 companies, latest first (Schedules 13D and 13G).
- Surface Oncology, Inc.SC 13G/A Jan 25, 2022 to Jan 31, 20232
- Cogent Biosciences, Inc.SC 13G/A Jan 25, 20223
- Spero Therapeutics, Inc.SC 13G/A Jan 25, 20224
Sources
The numbers on this page point here. Each one links to the record it came from.
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