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Anthropic has secured another significant block of office space in San Francisco, further deepening its footprint in the city’s Howard Street corridor. The artificial intelligence firm has leased about 100,000 square feet at 400 Howard Street, according to reporting by the San Francisco Business Times. The property is owned by the State Teachers Retirement System of Ohio and sits directly across the street from 300 Howard Street, which Anthropic leased in full earlier this year.
The approximately 370,000-square-foot building at 400 Howard Street is one of four office properties that make up the Foundry Square complex. A company spokesperson described the lease as part of Anthropic’s long-term commitments as it continues to scale in San Francisco. The spokesperson also noted that 400 Howard Street is expected to be activated for Anthropic’s workforce before the company moves into 300 Howard Street.
With this latest transaction, Anthropic is consolidating and expanding its cluster of offices within a tight radius of Howard Street. In addition to the new lease at 400 Howard Street and its full-building lease at 300 Howard Street, the company already maintains operations at two nearby towers. At 500 Howard Street, Anthropic subleases roughly 240,000 square feet from Slack, giving the AI firm a large footprint in that building. At 505 Howard Street, the company entered into a lease of approximately 100,000 square feet last year.
The leases at 500 and 505 Howard Street are currently expected to run through 2028, according to the reporting cited. Against that backdrop, the new commitment at 400 Howard Street and the full-building lease at 300 Howard Street indicate a multi-building strategy that provides both near-term swing space and a longer-term office platform in the same micro-location. All of the referenced properties are conventional office towers situated in San Francisco, reflecting Anthropic’s decision to grow within an established central business district environment rather than dispersing its operations across multiple submarkets.
While financial terms and lease durations were not disclosed, the scale and concentration of Anthropic’s occupancy along Howard Street underscore the continued role of large technology and AI users in shaping the city’s office leasing landscape. For the State Teachers Retirement System of Ohio, the tenancy at 400 Howard Street represents a commitment from a high-growth technology firm at a time when many office assets are still contending with elevated vacancy and evolving workplace strategies.
The post Anthropic Leases 100,000 SF at 400 Howard Street, Expanding San Francisco Footprint appeared first on CRE Market Beat.
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