Anthropic IPO Filing Spurs SF Housing Debate and Founder Questions

San Francisco-based artificial intelligence company Anthropic has filed for an initial public offering expected to inject billions of dollars into the city’s economy while intensifying competition in its housing market, even as a footnote in the company’s 335-page S-1 filing reveals that eighth cofounder Ben Mann is excluded from the founder group controlling majority voting power, according to reports by ABC7 News and The San Francisco Standard.

Ted Egan, chief economist for the City and County of San Francisco, told ABC7 News that Anthropic’s valuation could potentially reach $2 trillion—dwarfing Uber’s $82 billion initial valuation in 2019—bringing higher property and sales tax revenues while enabling employees to borrow against their shares to purchase homes even during post-IPO lockup quiet periods.

Presidio Heights Bidding Wars and Housing Affordability Concerns

Real estate broker Laura Pallin of The Agency told ABC7 News that cash-backed competition is already driving steep over-asking sales across scarce single-family inventory, citing an eight-bedroom home in San Francisco’s Presidio Heights that listed for $18.5 million and sold for $10 million above asking price.

Sam Moss, executive director of the Mission Housing Development Corporation, warned that the Anthropic IPO—alongside a potential future IPO by San Francisco-based OpenAI, valued at $1.2 trillion—will add pressure to a market where “most of us can’t afford houses already,” urging policymakers to reform multi-generational housing laws rather than blame software engineers.

S-1 Footnote 13 Excludes Ben Mann From ‘Continuing Founders’

Meanwhile, The San Francisco Standard reported that Footnote 13 on Page 248 of Anthropic’s 335-page S-1 filing states that while Benjamin Mann, 37, has been an integral part of Anthropic since its January 2021 founding and is “often referred to as a co-founder,” he is “not a member of the Founder LLC nor a Continuing Founder upon the completion of this offering, and accordingly will not participate in determining how our Class F common stock is voted.”

As a result, Mann is not part of the cohort of seven founders who will jointly control more than 50.1% of shareholder voting power. An Anthropic spokesperson confirmed Monday that there have been no changes to Mann’s role—where he co-leads experimental arm Anthropic Labs alongside Instagram cofounder Mike Krieger and recently signed an Oct. 14 agreement opening Anthropic’s Singapore office—and said “it’s still fair to refer to him as a cofounder.” University of Colorado Law School professor Ann Lipton noted that the footnote clarifies Mann will not hold ongoing Class F governance rights in the public entity.