Signature - Title
Noubar B. Afeyan, Ph.D. - Manager
Location
Cambridge, MA
Holdings as of
31 Dec 2025
Filing time
17 Feb 2026, 16:00:07 UTC
Form type
13F-NT
Description
No holdings are reported in this report, and all US holdings are reported by other reporting manager(s). Top holdings included .
Previous filing
Q2 2016 - 15 Aug 2016

Flagship Ventures Fund IV General Partner LLC didn't report any stock holdings as of Q4 2025.

Person Signing this Report on Behalf of Reporting Manager:

Name Title City, State Date
Noubar B. Afeyan, Ph.D. Manager Cambridge, Massachusetts 17 Feb 2026

Flagship Pioneering, LLC is reporting for Flagship Ventures Fund IV General Partner LLC:

Name Holdings Value Location File Number
Flagship Pioneering, LLC $324,036,288 Cambridge, MA 028-17559