AlphaCore buys a $5bn family office and keeps it out of the investment business
AlphaCore Wealth Advisory has acquired Streamline Family Office and will run it as a separate, deliberately non-advisory affiliate that continues to serve rival wealth managers.
On 15 September 2026, AlphaCore Wealth Advisory announced that it had acquired Streamline Family Office and would operate it as a separate affiliate under the name AlphaCore Streamline. The buyer is a registered investment adviser in La Jolla, California, with more than $10bn under management and a practice built around alternative investments. Streamline is a 15-person firm in Dover, Massachusetts, founded and led for more than 25 years by chief executive Katie Sullivan, whose client families account for close to $5bn in assets. Financial terms were not disclosed.
The unit will not manage money
What the new affiliate will not do is the point of the deal. AlphaCore Streamline does not select investments and does not give investment advice. It handles the administrative side of family wealth: bill payment, balance-sheet management, and setting up a family foundation are the examples Dick Pfister, AlphaCore’s founder and chief executive, gave to WealthManagement.com. Aidan Walsh, AlphaCore’s head of corporate development, told InvestmentNews that the industry blurs the line between “offering family office services and operating a dedicated private family office”.
Sullivan becomes a partner in AlphaCore rather than the head of a division, and the unit will carry on working with other wealth management firms, as it did before the sale.
Buying the back office rather than the book
AlphaCore has spent the past two years buying capability around the portfolio rather than more portfolios. Its purchase of SPC Financial last year brought a six-person accountancy team and tax planning. Brave Family Advisors, a $700m practice, arrived last month and gave the firm its first New Jersey office. An in-house family office function already existed under Tara Dekel. Pfister said building the Streamline team from scratch would have taken years of hiring. AlphaCore is backed by Constellation Wealth Capital, which took a minority stake in December 2023.
The move fits a pattern. WealthManagement.com lists Wealthspire, Summit Wealth Group and Farther among firms that have announced family office divisions this year. InvestmentNews puts the number of ultra-high-net-worth individuals in the United States at roughly 200,000, a fifth more than in 2023.
What it means for family offices
The structure separates administration from asset management and prices the two apart, which is closer to how a single family office is actually staffed than to how most wealth managers sell. That is the useful part for a family shopping for an outsourced provider: the people who reconcile the accounts and know where every asset sits do not have to be the people picking the managers, and there are reasons to keep them apart.
The open question is independence. AlphaCore Streamline will keep serving wealth managers that compete with AlphaCore for the same mandates, which means rival firms are routing their clients’ bill payment and consolidated reporting through a subsidiary of a competitor. Sullivan’s own framing was that at $100m a family’s affairs warrant the sort of department a company would have. A department of that kind sees everything. Any family using a provider owned by an adviser should ask, in writing, who has access to the data, how referrals travel in both directions, and what happens to the administration relationship if the investment mandate moves. Those answers rarely appear in a deal announcement.
Sources: WealthManagement.com; InvestmentNews; Private Banker International.