Alignment Research Center (ARC) — Headquarters: Berkeley, CA

NoteThe source is ARC's official website (alignment.org) and discusses the organization's mission, research focus, and methodology. However, the provided excerpt contains no information about the organization's headquarters location. While the claim states 'Berkeley, CA', the source text does not address this claim at all. To verify this claim, one would need to find a different section of the website or another source that explicitly states ARC's headquarters location.

NoteThe provided source text from alignment.org contains information about ARC's mission, research focus, and team updates, but does not explicitly state the organization's headquarters location. While the URL domain (alignment.org) and the claim reference Berkeley, CA, the actual source text excerpt provided does not confirm or contradict this geographic claim.