$6M Williamsburg Townhouse Bets on Anthropic’s IPO

• Three U.S. listings, Mill Valley, San Francisco, and Brooklyn, are now accepting Anthropic shares as payment for homes priced between $3M and $8M
• The trend accelerated after Anthropic filed a confidential S-1 on June 1, 2026, giving paper-rich employees a visible path to liquidity
• Anthropic is valued at $965B following a $65B Series H; OpenAI at $852B as of March 2026
• Anthropic has cautioned that share transfers without board approval are invalid — a structural hurdle the deals have yet to fully resolve

The Trade Nobody Thought Was Possible

In April, a Miami-based investment banker put his 13-acre Marin County estate on LinkedIn, not Zillow, and asked for Anthropic stock. A month later, a developer in San Francisco's Duboce Triangle listed a 119-year-old renovated home at $2.995 million and told the listing agent to take calls from buyers holding OpenAI or Anthropic shares. This week, a Williamsburg seller dropped the same offer into a $5.99 million townhouse listing beside Domino Park.

Three cities. Three properties. One thesis: private AI equity is becoming a real estate currency, and the sellers who believe it most are moving first.

Mill Valley: The First Mover

Storm Duncan, founder and managing partner of Ignatious, a tech investment bank, made his bet in late April. His property at 114 Inez Place, a four-bedroom, five-bathroom ranch home on a 13-acre compound in Mill Valley's Strawberry neighborhood, is not a formal MLS listing. Duncan announced it on LinkedIn. He's asking for Anthropic shares in exchange, with the number of shares to be negotiated based on a valuation then hovering around $800 billion.

The compound has an infinity pool, hot tub, putting green, and panoramic views of the bay, Mount Tamalpais, and San Francisco. Duncan bought it in 2019 for $4.75 million — the same property its previous owner had listed for $10.8 million in 2016. He's offering to cover closing costs and structure the deal as a private transaction, pitching it as a tax-efficient move for Anthropic shareholders who want real estate exposure without triggering a sale.

"I'm under-concentrated in AI investments relative to the importance of AI in the future, and over-concentrated in real estate," Duncan told the SF Standard. "My perspective is that someone who owns Anthropic stock is probably in the exact opposite scenario."

Duncan said he'd had "very thoughtful, very engaged" conversations with Anthropic shareholders. No deal has been announced.

San Francisco: The Listing That Broke the Internet

A month later, in late May, a 2,495-square-foot home at 160 Noe Street in Duboce Triangle went to market at $2.995 million, priced for cash, Anthropic stock, or OpenAI shares. Within 24 hours, listing agent Rachel Swann of Coldwell Banker reported her phone hadn't stopped ringing.

"My phone has been blowing up," Swann told Business Insider. "It seems to be very exciting for people."

The property, built in 1907 and recently renovated through a two-year gut renovation that replaced plumbing, electrical, and HVAC, spans three bedrooms and two bathrooms across two levels. The seller, an unidentified luxury developer who is a daily user of both OpenAI and Anthropic, told Swann the idea came from watching AI employees and investors circling the San Francisco housing market, cash-poor and share-rich, unable to buy. The listing was the first on the MLS to formally advertise AI equity as payment.

At $2.995M, the property works out to roughly $1,201 per square foot above the SF single-family median but in line with Duboce Triangle premiums. The neighborhood, a short walk from the Castro and Hayes Valley, has seen its median home price climb past $2M as the AI boom reshapes the city's demand curve.

Brooklyn: Timed to the S-1

The Brooklyn entry arrived this week at 3 Wythe Lane in Williamsburg, listed at $5.99 million through Christine Blackburn and Lior Barak of the Barak Blackburn Team at Compass. The seller, who has lived in the property for roughly a decade, said they were directly inspired by Anthropic's confidential S-1 filing on June 1, a deliberate signal to Anthropic employees that their approaching IPO windfall could translate into a home.

"Every generation has its wealth-creation vehicle," the seller said in a written statement. "If someone has been fortunate enough to participate in one of those trends and wants to exchange a portion of that position for real estate, we're happy to have the conversation."

The property is a 4,470-square-foot, four-bedroom townhouse inside the Wythe Lane Townhomes development — a private mews developed by KUB Capital, built in 2015 and finished in 2016. Features include a finished basement with 12-foot ceilings, a private garage with EV charging, a landscaped garden, and a rooftop deck facing the Manhattan skyline and Williamsburg Bridge. The seller paid $4.17 million in 2016, relisted at $6.5 million in August 2025, and has since cut the price twice to arrive at $5.99M — roughly $1,339 per square foot. Bitcoin is also accepted.

The Structural Problem Nobody Has Solved

The pitch is compelling. The mechanics are complicated.

Anthropic has publicly stated that share transfers require board approval and that any transaction without it is invalid. Employees and investors holding shares are typically subject to right-of-first-refusal clauses and transfer restrictions that don't disappear because a seller wants a townhouse. A buyer using Anthropic stock could hand over shares that the company refuses to recognize, leaving both parties with a disputed transaction and no clear recourse.

Josip Rupena, CEO of Milo, a Miami-based lender that has facilitated more than $100 million in crypto-backed mortgages, many in Southern California, noted that the appeal of non-cash real estate deals often comes down to taxes and timing. Buyers can maintain exposure to assets they expect to appreciate while deferring capital gains. "The moment they sell, they lose the future upside," he told the SF Standard. Anthropic equity deals carry the same logic, with added legal complexity that crypto deals don't.

None of the three listings above has announced a completed equity-for-property transaction.

What the IPO Changes

The listings are less about sellers needing liquidity and more about sellers betting the IPO is close enough to make the offer credible. Anthropic filed its draft S-1 with the SEC on June 1, closing a $65 billion Series H at a $965 billion private valuation. If the company prices publicly above that figure, the shares-for-property math tightens considerably: the stock becomes easier to transfer, the buyer's cost basis is clearer, and the paper wealth employees have been sitting on converts into something a title company can recognize.

San Francisco's single-family median crossed $2 million earlier this spring, per Compass data, the first time in the market's history. Bay Area agents have reported bidding wars at the high end, driven partly by AI employee demand. The Brooklyn listing is an early sign that the same dynamic is spreading east, with sellers in other markets positioning themselves for the capital event before it arrives.

The race to be first is already over. Now the question is whether anyone actually closes.