The numbers come first. In Atherton, the median sale price reached $8.33 million in 2025, a 5% gain from the previous year and a new high for the longtime Bay Area billionaire enclave, according to PropertyShark. The town's top deal of the year was a $51.5 million sale of a 10,000-square-foot estate once owned by tech executive and multimillionaire Stephen Luczo.
But the bigger story is how these homes are changing hands. A growing class of ultrawealthy buyers, especially tech and AI executives who have moved to Silicon Valley, is routing purchases through limited liability companies, privacy trusts and so-called whisper listings that never touch the multiple listing service. The goal is not a better deal. It is anonymity.
Ken DeLeon, founder of Palo Alto-based DeLeon Realty, said the shift started about three years ago, when the market capitalization of tech companies began to grow again and more wealthy people began flooding Silicon Valley. He said increased wealth brought greater security concerns and a stronger desire for privacy. He also said AI has driven some of the greatest wealth creation Silicon Valley has seen in 25 years, while becoming an increasingly controversial topic.
That concern has a real-world backdrop. In April, a man threw a Molotov cocktail at OpenAI CEO Sam Altman's North Beach home in San Francisco, setting fire to an exterior gate. Authorities later alleged the 20-year-old suspect had traveled from Texas, intending to kill Altman, and had written about AI's purported risk to humanity. DeLeon said events like this have made people want to distance themselves further from public attention and increased their desire to remain anonymous.
The mechanics of stealth-wealth buying are built to leave less of a trail. There is no Zillow notification, no open house and often no sign in the yard. A listing may circulate among just three to five elite brokers in a metro before quietly trading hands, DeLeon said. Some sellers, he added, prioritize privacy over price and are willing to sell off market to avoid exposure.
The pattern extends beyond Silicon Valley. Off-market residential sales have surged at least 30% year-over-year in Brooklyn, Manhattan and Queens between 2024 and 2025, with Brooklyn alone logging roughly $5.4 billion in privately marketed sales, according to data reported by The Real Deal.
DeLeon said he routinely recommends taking title through an LLC or a privacy trust, and that sophisticated clients want the LLC manager to be someone not directly associated with them. He also said utilities, deliveries and even small packages are often placed under the LLC or trust name rather than the owner's personal name.
Luxury agents have become part broker, part buffer. DeLeon said he is routinely asked to meet vendors, sign for inspections and field questions an owner would normally handle. In some cases, he said, both sides of the transaction conceal their identities.
The market has already voted. Privacy is now a premium product, and transparency is the price of exposure. For sellers and agents, that may be a clever adaptation. For everyone else, it is a reminder that capital always finds a way to protect itself when the stakes are high.
