The United States has the deepest pool of private family capital in the world, and it is the only major market where a cold approach still works often enough to be worth building a process around. If you are raising a fund, a round or project equity and you want American family office money, the practical answer is this: there are roughly 550 US single family offices worth approaching plus about 300 multi family offices, two thirds of them do private equity, half do venture, and the deciding factor is almost never the quality of your deck. It is whether you reached the right office with a proposition that fits what they already do.
All numbers below come from the familyofficehub.io database, last full review June 2026. We have documented family offices since 2018 and check every entry by hand on a rolling cycle.
How many family offices are there in the US?
Our database documents 554 US single family offices and around 300 US multi family offices. Unlike Europe, the money is genuinely distributed:
- New York State: 97 documented single family offices, 88 of them in New York City
- California: 91, split between the Bay Area and Los Angeles
- Texas: 46 and Florida: 45, both still growing fast on inbound relocation
- Illinois: 40, with 30 in Chicago, mostly industrial and trading wealth
- Massachusetts 22, Pennsylvania 19, Colorado 18, and a long tail across every other state
That distribution is the single most important planning fact for a US raise. A European fundraiser who books a week in New York will meet perhaps a sixth of the market. Dallas, Denver, Austin, Chicago and Palm Beach each hold enough capital to justify their own trip, and those offices get a fraction of the inbound that Manhattan does.
What do US family offices invest in?
Across the 554 documented US single family offices:
- Private equity: 67%, the highest share of any region we track, dominated by direct deals and co-investment
- Venture capital: 53%, roughly 295 offices with a documented venture focus
- Real estate: 43%, lower than Europe because so much US family wealth is operating business equity
- Capital markets and financial products: 32%
- Renewables: 5%, though climate and energy transition exposure is frequently booked inside venture and infrastructure mandates rather than flagged separately
The American difference is speed and appetite. US offices are more willing to take a first meeting with a stranger, more comfortable writing a first cheque into something unproven, and considerably more direct when the answer is no. That cuts both ways: you will get through more doors and you will be dismissed faster.
Why an AI chatbot cannot build this list for you
The US is the market where AI generated lists look most convincing and cause the most damage, because enough family office information exists online to make the output plausible without making it correct.
A model will confidently give you offices that closed in 2021, principals who moved firms two years ago, addresses harvested from press releases and, mixed in, entities that never existed. About one in seven US offices in our database has no website of its own, so the most private and often most interesting names are exactly the ones the model cannot see. Meanwhile the information that would actually help you, such as which office quietly led a round three years ago, sits in trade coverage that has since been paywalled, in conference materials taken offline, and in details offices gave us directly.
The economics are worse than they look. Verifying an AI generated list of 400 offices by hand is several weeks of work, and you cannot skip it, because sending a pitch to a fabricated office costs you nothing but sending it to a real office with the wrong premise costs you the relationship. We ran the numbers in The hidden cost of using AI to build a family office list and detailed the failure modes in Can AI build a family office list.
Our US coverage runs at 94% for executive names, 91% for postal addresses, 70% for phone numbers and 64% for a general office email address. Those percentages exist because people re-checked them, not because a crawler found them.
The 800 Largest Family Offices in the United States
The deepest pool of private family capital anywhere, bundled into one file: 500 single family offices and 300 multi family offices with contact details, investment focus and named executives.
Five US family offices worth understanding before you pitch
All five are publicly documented and we have written about each. They show the range from ultra concentrated founder vehicles to sprawling multi entity family structures.
Bezos Expeditions is, by our analysis, the largest US single family office by assets under management. Based on Mercer Island, Washington, it runs Jeff Bezos’s personal investments across technology, biotech and space, and it was one of the most active offices globally in 2025 with concentrated bets on AI and robotics. See What is the largest US family office by AUM and our portrait of Bezos Expeditions.
Walton Enterprises is the reference case for the hub and spoke structure that trips up most fundraisers. The central office in Bentonville holds the family’s core Walmart position, while individual family members run their own vehicles with entirely different mandates, including Builders Vision on the impact side. Pitching the hub when you want the spoke is a wasted month. We mapped the structure in The Walton family offices, and CNBC covered the wider network in this investigation.
Cascade Investment, Bill Gates’s vehicle in Kirkland, Washington, is the archetype of the diversified, quiet, institutionally run family office: large public positions, real assets, hospitality and agriculture, with almost no public deal noise.
Hillspire, Eric Schmidt’s Menlo Park office, dominated 2025 deal flow among US family offices with multi billion commitments to AI infrastructure and deep technology. If you are raising in compute, energy for compute or frontier tooling, this is the profile you are looking for.
Willett Advisors manages Michael Bloomberg’s personal and philanthropic assets and deployed heavily into late stage clinical biotech through 2025. See our analysis of the 10 most active US family offices in 2025.
For the wider market picture, see our complete guide to family offices in the United States and our overview of the 20 wealthiest US billionaires and their family offices.
How to actually make contact: a five step process
1. Segment by thesis, then by geography. Two thirds of the US market does private equity and roughly half does venture, but the overlap is not uniform. Filter our list by focus flag and documented example investments first, then cluster the survivors by city so a trip to Chicago or Dallas covers eight meetings rather than one.
2. Send the first email to the general office address. We publish general office addresses, not personal ones, which is what the offices are comfortable with and what data protection rules permit us to distribute. We hold one for 64% of US entries. For the rest, the phone number and the postal address are usually enough to get to a named person.
3. Derive the principal’s address when the raise justifies it. We carry executive names in mail merge format for 94% of US entries, which is the input you need for standard email finding tools. Our free tutorial walks through it: the 5-step process to finding family office CEO emails. Expect a 30 to 70 percent hit rate.
4. Lead with the prior investment. American offices respond to specificity about their own portfolio faster than to anything else. “You led the Series A in X, we are the industrial version of that thesis” opens doors that no amount of credentials will. That is the entire reason the example investments column exists in our data.
5. Follow up properly, then move on. Two follow ups spaced ten and twenty one days apart is normal and expected in the US, unlike Europe. After that, stop. Add them to a quarterly update list instead, because family offices convert on the third or fourth touch far more often than on the first.
What to put in the first email
- Subject line: sector, stage, cheque size. Nothing else.
- Line one: the specific portfolio overlap or thesis match. Not your founding story.
- Body: traction numbers, the raise, the terms, who else is in.
- Ask: fifteen minutes, with two concrete time windows offered.
- Length: under 150 words. American principals skim on mobile.
Mistakes that get you ignored in this market
- Pitching the hub when you need the spoke. Large American families run several offices with different mandates. Identify which entity actually holds the mandate before you write.
- Treating a family office like an LP in a fund. Most US offices would rather co-invest directly than take a blind pool commitment, and pitching fund economics to a direct investor reads as a mismatch.
- Only working New York. Two thirds of the documented market sits outside New York State, and those offices get dramatically less inbound.
- Sending decks first. Offer, do not attach. Attachments from strangers get quarantined by exactly the security teams these offices employ.
Frequently asked questions
How many family offices are in the US?
The familyofficehub.io database documents 554 US single family offices and around 300 multi family offices as of June 2026. Industry estimates of the total universe run higher, since a single family office has no registration or disclosure obligation unless it crosses SEC thresholds.
Which US state has the most family offices?
New York, with 97 documented single family offices, 88 of them in New York City, followed by California with 91, Texas with 46, Florida with 45 and Illinois with 40.
Do US family offices invest in startups?
Yes. 53% of the US single family offices we document have a venture capital focus, roughly 295 offices, and 67% invest in private equity. Many prefer direct deals and co-investments over fund commitments.
Do you provide personal email addresses of executives?
No. We provide general office email addresses, phone numbers, postal addresses and executive names in mail merge format. Personal addresses can be derived from that using our free tutorial.
Can I see a preview before buying?
Yes. Email contact [at] familyofficehub.io and we will send a preview file of the US list.
Where to go next
- The 800 largest American family offices, single and multi family offices bundled
- The 500 largest US single family offices
- The 200 largest US venture capital single family offices, if you are raising a round
- The 200 largest US real estate single family offices
- New York, California and Texas as single state lists
- Family offices in the United States: the complete guide 2026
Data source: familyofficehub.io proprietary database of US single family offices, June 2026 review. Figures reflect the offices we document and are not a complete census of the US market. All data points are subject to public availability.
Picture source: Unsplash+
Last Updated on August 4, 2026
