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Anthropic Leases All of 484k sf Office Complex in San Francisco

2/10/26

In a notable office lease in San Francisco, Anthropic inked a deal for the entirety of 300 Howard, a 466k sf, 25-story office tower, and 342 Howard, a historic 18k sf building. The properties are owned and managed by a joint venture between DivcoWest and Blackstone Real Estate.

Anthropic’s commitment is one of the largest in the city’s history. The deal highlights how artificial intelligence companies are driving office demand, accelerating the revitalization of downtown San Francisco, and reinforcing the city’s position as the capital of AI and technology innovation.
Anthropic, which currently occupies space in two nearby buildings at 500 and 505 Howard, will anchor its presence at 300 Howard within “AI Alley,” the growing downtown San Francisco corridor that is rapidly attracting leading AI companies and talent.

300 Howard features flexible floorplates, Bay views, exceptional amenities and a prime South Financial District address. Notably, the building sits directly alongside Salesforce Park, a five-acre urban oasis spanning four city blocks, complete with a half-mile walking loop and a lush ‘green roof’ atop the Salesforce Transit Center. Often dubbed San Francisco’s ‘Grand Central of the West,’ the Transit Center provides seamless regional connectivity, linking employees to the city and beyond via bus and light rail lines in every direction further reinforcing 300 Howard’s appeal.

DivcoWest and Perform Properties, Blackstone Real Estate’s retail and office portfolio company, worked with JLL Vice Chairman Chris Roeder, Senior Managing Director Ted Davies, and Senior Vice President Carlye Parker to represent ownership in the lease negotiations. Felipe Gomez-Kraus and John Diepenbrock of JLL represented Anthropic. Terms of the deal were not disclosed.




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