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Anthropic to expand to yet another office building in downtown San Francisco

Firm balloons in city's SoMa district as AI companies shatter fundraising records
The State Teachers Retirement System of Ohio bought 400 Howard St. in 2012, when it was occupied almost entirely by multinational asset-management company BlackRock. (CoStar)
The State Teachers Retirement System of Ohio bought 400 Howard St. in 2012, when it was occupied almost entirely by multinational asset-management company BlackRock. (CoStar)
CoStar News
April 2, 2026 | 11:28 P.M.

Artificial intelligence giant Anthropic is expanding its presence on a downtown San Francisco stretch two of its landlords have dubbed “AI Alley.”

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News | Anthropic to expand to yet another office building in downtown San Francisco