Alignment Research Center — Headquarters: Berkeley, CA

Note: The source excerpt from alignment.org contains information about ARC's mission, research focus, methodology, and future plans, but does not address the headquarters location. While the URL domain (alignment.org) is provided, this does not confirm a physical headquarters location. To verify the claim about Berkeley, CA as headquarters, one would need a source that explicitly states the location, such as an 'About Us' page with contact information, a registration document, or other official documentation specifying the headquarters address.

Note: The 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.