Fiserv Acquires StoneCastle to Add Insured Deposit Funding Solutions

Fiserv completed its acquisition of StoneCastle Cash Management and will integrate the company’s institutional deposit network with the Fiserv ecosystem.

This integration will expand Fiserv’s ability to deliver insured deposit funding solutions and will extend the capabilities of its ecosystem that includes core account processing, digital banking and payments platforms, the company said in a Wednesday (Dec. 17) press release.

“This acquisition highlights Fiserv’s unique position at the intersection of banking and commerce: for banks, it provides a new, stable deposit source; for Merchant clients, including our Clover merchants, it provides a safe, high-yielding alternative to manage their operating cash,” Fiserv Co-president Takis Georgakopoulos said in the release.

“Looking to the future, StoneCastle brings unique liquidity benefits to our FIUSD stablecoin solution,” Georgakopoulos said. “Together, we are focused on unlocking new revenue opportunities, deepening client relationships and accelerating innovation across the financial ecosystem.”

Fiserv announced in September that it signed a definitive agreement to acquire StoneCastle and expected the transaction to close by the first quarter of 2026.

The transaction closed after the receipt of all required regulatory approvals and the satisfaction of customary closing conditions, according to the Wednesday press release.

The company said in its September announcement that in addition to adding capabilities to the Fiserv ecosystem, the acquisition would enable it to leverage StoneCastle’s platform to help financial institutions retain funds associated with FIUSD stablecoin issuance.

StoneCastle Partners Founder and CEO Joshua Siegel said at the time in a press release: “Joining Fiserv will accelerate our ability to innovate, expand our reach to financial institutions and depositors, and deliver even greater value through a unified, modern platform. We’re excited to pair our deposit funding expertise with Fiserv’s technology and client relationships.”

In another recent move, Fiserv said in September that it had acquired CardFree and would integrate that company’s order, payment and loyalty solutions for enterprise merchants.

In June, Fiserv said it agreed to acquire the remaining 49.9% stake in AIB Merchant Services (AIBMS) from AIB Group and aimed to strengthen its merchant services footprint across Ireland and Europe. The firm said the transaction would give Fiserv full ownership of AIBMS, one of Ireland’s largest payment solution providers and a top European eCommerce acquirer.