The back office for billionaires runs on one man's allergy to silos
Somewhere right now a single-family office is closing its books, and the reconciliation that used to eat a junior analyst's week is happening inside a platform Robert Mallernee built because he got tired of the alternative. AtlasFive - cloud-native, AI-driven, relentlessly integrated - keeps the financial lives of more than a thousand of the planet's wealthiest families in one place. Mallernee is its founder and the CEO of Eton Solutions, the Research Triangle Park company that sells it. He is also, by his own framing, the customer he was trying to rescue.
The line he keeps coming back to is a pun he clearly enjoys: "Spreadsheets are 'separate-sheets.' They are typically siloed and do not connect to anything else in the family office." It sounds like a throwaway, but it is the whole thesis. For decades the people who manage serious money have run multi-entity empires - trusts, partnerships, real estate, private equity, art, the operating company that started it all - on a patchwork of disconnected files, each maintained by someone who guards it. Mallernee's bet was that this was not a tooling annoyance. It was the core problem, and it was solvable only by someone who had lived inside it.
He had. Before Eton Solutions was a company, AtlasFive was the in-house engine of Eton Advisors, the multi-family office Mallernee co-founded and ran. The software existed to make his own firm work. Only after it did its job did he make the harder decision: spin it out, turn a competitive advantage into a product, and sell it to the very industry he competed in. That is an unusual move. Most operators hoard the thing that makes them faster. Mallernee productized it.
Adopting enterprise level technology allows Family Office employees to spend time in analysis and decision making, not managing data.
- Robert Mallernee, on why the family office needs one system, not a hundredA CFA who spent three decades watching the problem before he fixed it
The credentials read like a tour of how American wealth actually gets managed. Mallernee came up through Price Waterhouse and Arthur Andersen, the auditing world where you learn that a number is only as good as the ledger behind it. He ran the Private Asset Management Group at NC Trust Company. He was a founding principal of US Trust's Multi-Family Office and went on to lead the UBS Multi-Family Office Group as a Managing Director. Each stop was a closer look at the same gap: the families had grown more complex than the systems serving them.
He holds an MBA in international business and finance from the University of Chicago's Booth School and a degree from UNC Chapel Hill, and he carries a CFA charter - the credential that signals he can read the portfolio, not just the software spec. That combination is the point. Mallernee is fluent in both the language of estate and income tax planning and the language of systems design, which is exactly why AtlasFive feels less like a fintech demo and more like a tool built by someone who knew what a workpaper costs.
He has never fully left the classroom side of it, either. Mallernee co-teaches a graduate-level Private Wealth Management course at UNC's Kenan-Flagler Business School, and sits on the Forbes Finance Council. The man running a billion-dollar-scale platform still shows up to explain the fundamentals to students who will inherit the industry.
From EtonGPT to EtonAI: putting the grunt work where it belongs
The newest chapter is artificial intelligence, and Mallernee is pointing it at the least glamorous, most valuable corner of the business: the data chores. In late 2024 Eton launched an EtonGPT-enabled fund accounting platform aimed squarely at private equity general partners. The feature set matured and the name grew up with it - EtonGPT became EtonAI. The promise is consistent with everything he has said for years: let the machine reconcile, classify and process, so the humans do the thinking.
The integrated, cloud-native platform that aggregates liquid and alternative assets, then runs the data, reporting and workflow on top.
Formerly EtonGPT. Best-in-class AI woven into the platform to optimize processes and cut the manual load.
An AI-enabled platform and service built for the general partners of private equity firms and funds.
Three years, one trajectory
Self-reported growth, 2022-2025. Series C led by Navis Capital Partners.
$58 million to take the quiet platform loud and global
In July 2025 Eton Solutions closed a $58 million Series C, raised in two tranches and led by repeat backer Navis Capital Partners. Total reported funding sits around $91.7 million. The cash is earmarked for AtlasFive product innovation, deeper AI development, and an expanding suite aimed at private equity firms and funds. Satyen Patel serves as Executive Chairman alongside Mallernee's CEO seat.
The scale numbers do the bragging so Mallernee does not have to: a platform overseeing more than $1.4 trillion in assets, 24.5 million transactions processed a year, north of 359,000 liquid and illiquid assets aggregated, and clients spanning single and multi-family offices, RIAs, accounting firms, business managers, private equity firms, funds and global private banks. The company runs from Research Triangle Park, with outposts in Singapore's Asia Square Tower and Dubai.
What he is selling, underneath the asset totals, is a change of posture. The old family office spent its days managing data. Mallernee's argument is that the modern one should spend its days deciding what to do with it - and that the only way to get there is to stop running an empire on separate sheets.