Fiserv has entered into a definitive agreement to acquire StoneCastle Cash Management, a New York-based firm established in 2009 that operates a platform allocating deposits from high-value clients across a network of over 1,000 FDIC-insured community banks and credit unions.
Fiserv stated its intention to become a technology-enabled source of billions of dollars in institutional deposits through this acquisition. The company plans to integrate StoneCastle’s capabilities into its existing suite of core account processing, digital banking, payment, and cash management services. StoneCastle currently utilizes Fiserv’s Finxact core for its digital assets business and maintains existing relationships with over 300 of Fiserv’s core clients.
The acquisition is also expected to enable integrated access to other contingent funding solutions for financial institutions. Fiserv anticipates that StoneCastle will assist financial institutions in retaining funds associated with FIUSD stablecoin issuance. Fiserv unveiled FIUSD on Solana in June, developed in collaboration with Paxos and Circle, and is currently working to deliver a new digital asset platform for the stablecoin by the end of this year.
StoneCastle’s platform provides clients with up to $100 million in federal insurance protection across multiple rates by strategically distributing deposits among its network of banking partners.
The transaction is anticipated to close by the first quarter of 2026, pending regulatory approvals. Financial terms of the agreement have not been disclosed.
