SS&C Technologies Acquires Calastone

Fiserv Acquires StoneCastle Cash Management

December 17, 2025

Financial Services

Fiserv has completed its acquisition of StoneCastle Cash Management, integrating StoneCastle's institutional deposit network and cash management capabilities into Fiserv's payments, core processing and digital banking ecosystem. The deal extends Fiserv's insured deposit and liquidity solutions for financial institutions and merchants and links StoneCastle's capabilities to Fiserv's FIUSD stablecoin and broader cash-management product set; financial terms were not disclosed.

Converge Technology Solutions Acquires Stone Technologies Group (Stone Group)

September 22, 2022

IT Services

Converge Technology Solutions Corp. agreed to acquire UK-based Stone Technologies Group Limited (Stone Group), a provider of circular IT and managed IT services to education, public and private sector clients. The deal (subject to regulatory approvals) expands Converge’s European footprint and adds Stone’s sustainability-focused IT recycling and managed services capabilities to Converge’s global platform; sellers included Souter Investments and RJD Partners.

SS&C Takes Minority Stake in Combined Equiniti and AST

December 21, 2021

Financial Services

SS&C Technologies has made a strategic minority investment in the newly formed company combining Equiniti and American Stock Transfer & Trust Company (AST), a business recently acquired by affiliates of Siris Capital Group. The investment joins SS&C with Siris and other investors to create a leading international provider of shareholder, transfer agent and regulatory technology and to explore commercial and product partnerships across the combined business.

The Carlyle Group Acquires Majority Stake in Calastone

October 26, 2020

Payments & Fintech

Global investment firm The Carlyle Group has agreed to acquire a majority stake in Calastone from existing shareholders including Octopus Ventures and Accel, with Calastone management retaining a minority stake. The deal (subject to regulatory approval) will support Calastone’s product innovation and international growth, building on its position as a funds network that serves thousands of clients and processes large monthly investment flows.

StepStone Acquires Appcast

July 1, 2019

Cloud & SaaS

StepStone has acquired a majority stake in Appcast, a U.S.-based programmatic job advertising and recruitment ad tech provider. The acquisition brings Appcast’s Clickcast SaaS platform and programmatic capabilities into StepStone’s global job-board and recruitment technology portfolio, and follows prior investment in Appcast by Baird Capital.

The Carlyle Group Acquires SS&C Technologies, Inc.

November 22, 2005

Software

Sunshine Acquisition Corporation, an acquisition vehicle affiliated with The Carlyle Group, completed the cash acquisition of SS&C Technologies, Inc., taking the company private for approximately $942 million ($37.25 per share). The deal transfers SS&C from a NASDAQ-listed company to private ownership under Carlyle, intended to support SS&C’s continued growth of its financial technology software and services.