Aquiline takes control of wealthtech platform Flourish, grows $8B custody book

What's the deal? Aquiline Capital PartnersDealroom has a profile for this one. Try Dealroom → has agreed to invest in Flourish, a New York wealthtech platform currently owned by MassMutualDealroom has a profile for this one. Try Dealroom →, taking a controlling interest through a growth equity deal announced September 2, 2026. MassMutualDealroom has a profile for this one. Try Dealroom → will retain a significant stake. The transaction is expected to close in the fourth quarter of 2026, subject to regulatory approvals.

What's the endgame? Flourish equips more than 1,300 Registered Investment Advisors (RIAs) with private-bank-like tools, from cash management to home lending. Its advisor-led cash solution grew assets under custody from $1 billion to $8 billion in five years, and it recently launched the first home-lending product built exclusively for the independent advisor channel.

Who's steering it? David Canter, who previously led FidelityDealroom has a profile for this one. Try Dealroom →'s RIA and Family Office segments, will join the Flourish board as executive chairman. He replaces no named predecessor in the role and brings direct experience serving the independent advisor market the company targets.

Why Aquiline? The firm has invested across wealth, retirement, and investment technology, backing AscensusDealroom has a profile for this one. Try Dealroom →, AssetmarkDealroom has a profile for this one. Try Dealroom →, RIA-in-a-BoxDealroom has a profile for this one. Try Dealroom →, and SageviewDealroom has a profile for this one. Try Dealroom →. Its track record scaling go-to-market efforts was central to MassMutual's decision, according to the companies.

What they're saying: "Under MassMutual's ownership, Flourish has built a following that includes some of the largest and fastest-growing RIA firms," said Charles Janeway, principal at Aquiline. Chief executive officer Max Lane said the new structure "preserves our deep, ongoing relationship with MassMutual while providing the agility to accelerate our roadmap."

The signal: The deal reflects growing investor appetite for tools that help independent advisors compete with large broker-dealers and wirehouses. As RIAs push to serve every part of a client's financial life, cash and lending platforms are becoming foundational infrastructure — and a target for control-stake capital.

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