SS&C Technologies Acquires Calastone

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.

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.

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.

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.

Capstone Holding Corp. Acquires Canadian Stone Industries

December 1, 2025

Building Products

Capstone Holding Corp. (NASDAQ:CAPS) has closed the acquisition of Canadian Stone Industries (CSI), a multi-location distributor that adds approximately $15 million of annual revenue. The deal expands Capstone’s North American footprint, strengthens its premium brand portfolio, and is expected to be immediately accretive to revenue and EBITDA.

Oldcastle APG Acquires Calstone

March 30, 2022

Building Products

Oldcastle APG, a CRH company, has acquired Calstone, a Northern California manufacturer of pavers, concrete masonry, retaining walls and other hardscape products. The acquisition expands Oldcastle APG's product and manufacturing capabilities in California and strengthens its outdoor living and sustainable building-products offerings in the region.