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Anthropic Grows San Francisco Footprint Yet Again

Artificial intelligence startup Anthropic continues to scale up its San Francisco presence, leasing about 100,000 square feet at 400 Howard St., the San Francisco Business Times reported. Owned by the State Teachers Retirement System of Ohio, 400 Howard is across the street from 300 Howard, which Anthropic leased in its entirety this past January.

The roughly 370,000-square-foot 400 Howard, one of four buildings in the Foundry Square complex, is part of Anthropic’s “long-term commitments” as it continues to scale in San Francisco, a company spokesperson told the Business Times. It will house Anthropic employees before 300 Howard does, according to the spokesperson.

Anthropic has an existing presence at two nearby San Francisco office towers: 500 Howard St., where it subleases approximately 240,000 square feet from Slack, and 505 Howard St., where last year it leased roughly 100,000 square feet. The 500 and 505 Howard leases are expected to expire in 2028.

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About Paul Bubny

Paul Bubny serves as Senior Content Director for Connect Commercial Real Estate, a role to which he brings 16-plus years’ experience covering the commercial real estate industry and 30-plus years in business-to-business journalism. In this capacity, he oversees daily operations while also reporting on both local/regional markets and national trends, covering individual transactions across all property types, as well as delving into broader subject matter. He produces 7-10 daily news stories per day and works with the Connect team and clients to develop longer-form content, ranging from Q&As to thought-leadership pieces. Prior to joining Connect, Paul was Managing Editor for both Real Estate Forum and GlobeSt.com at American Lawyer Media, where he oversaw operations at both publications while also producing daily news and feature-length articles. His tenure in B2B publishing stretches back into the print era, and he has served as Editor in Chief on four national trade publications. Since 1999, Paul has volunteered as the newsletter editor of passenger rail advocacy groups (one national, one local).

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