Anthropic Subleases Office Space at 181 Fremont
The AI firm is taking over 30,000 square feet of space previously held by Meta in the South of Market district.
Updated on Oct. 27, 2026 in Remote Work
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Anthropic is expanding its footprint in the South of Market district by subleasing 30,000 square feet of office space from Meta Platforms at 181 Fremont Street. The company is taking over the fifth and sixth floors of the tower as it continues a period of rapid growth.
Why it matters
The move highlights the ongoing shift in the downtown office market as tech companies snap up sublease space vacated by larger firms like Meta. For residents, this footprint expansion by a major AI firm underscores the concentration of industry headquarters in SoMa.
Anthropic reported $16.3 billion in revenue for the first half of 2026, a significant increase compared to $1.2 billion in the first half of 2025. The company now manages over 1 million square feet of office space in SoMa, while the exact financial terms of this latest sublease remain undisclosed.
The players
Anthropic
An artificial intelligence company headquartered in San Francisco that is rapidly scaling its operations and office footprint.
Meta Platforms
The technology conglomerate that has been subleasing portions of its 181 Fremont Street office space since 2023.
The details
The sublease grants Anthropic space on the fifth and sixth floors of the 57-story building at 181 Fremont Street. Meta, which originally leased the 400,000-square-foot office component in 2017, has been offering the space for sublease since 2023. This new office is located near the company's planned headquarters at 300 Howard Street and will serve a workforce that has grown to 5,300 employees as of September 2026.
Timeline
2017: Meta leased the office component of 181 Fremont Street.
2023: Meta listed the 181 Fremont Street space for sublease.
H1 2025: Anthropic recorded $1.2 billion in revenue.
H1 2026: Anthropic recorded $16.3 billion in revenue.
March 2031: Meta's primary lease at 181 Fremont Street expires.
Across the Bay
This deal continues the trend of local firms absorbing inventory made available by the massive sublease listings that hit the market in 2023. It mirrors a broader citywide pattern where expanding AI companies move into space left behind by established tech giants.
Commuters and nearby workers in the South of Market district should expect increased foot traffic around 181 Fremont and the neighboring 300 Howard Street site. These shifts reflect the ongoing consolidation of AI-focused activity within the blocks surrounding the Transbay transit hub.
The takeaway
Anthropic's rapid scaling reflects the current momentum of AI development in downtown San Francisco. Keep an eye on commercial real estate filings for 300 Howard Street to see when the company officially transitions its headquarters to the new SoMa site.
Further reading
For more on how local businesses are adapting to shifting office needs, see Remote Work.
Source note: This article includes information reported by The Real Deal New York.
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