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Personnel: Zack Rosen at California YIMBY (Co-Founder and Board Member)

Verdictunverifiable95%
1 check · 4/14/2026

The source is a staff directory from California YIMBY's website showing current team members. Zack Rosen is not listed among the staff. While the source could theoretically be incomplete or outdated regarding historical founders, the absence of Zack Rosen from a comprehensive staff listing does not directly contradict the claim—he may have been a co-founder who is no longer actively listed as staff, or the source may simply not include historical founder information. The 2017 start date cannot be verified or contradicted from this source. This is unverifiable rather than contradicted because the source does not explicitly state who the founders are or when the organization was founded.

Our claim

entire record
Person
UrI5A6lfXT
Role
Co-Founder and Board Member
Role Type
board
Start Date
2017
Is Founder
Yes
Notes
Zack Rosen is Co-Founder of California YIMBY (2017) and serves on the Board. Also Co-Founder and CEO of Pantheon.

Source evidence

1 src · 1 check
unverifiable95%Haiku 4.5 · 4/14/2026

NoteThe source is a staff directory from California YIMBY's website showing current team members. Zack Rosen is not listed among the staff. While the source could theoretically be incomplete or outdated regarding historical founders, the absence of Zack Rosen from a comprehensive staff listing does not directly contradict the claim—he may have been a co-founder who is no longer actively listed as staff, or the source may simply not include historical founder information. The 2017 start date cannot be verified or contradicted from this source. This is unverifiable rather than contradicted because the source does not explicitly state who the founders are or when the organization was founded.

Case № mINjVTKqHvFiled 4/14/2026Confidence 95%
Source Check: Personnel: Zack Rosen at California YIMBY (Co-Founder and Board Member) | Longterm Wiki