BTRS Holdings Inc., traded under the ticker BTRS, is a business-to-business financial technology company specializing in accounts receivable automation and integrated payments through its Billtrust platform. The company entered the public markets via a de-SPAC merger with South Mountain Merger Corp, a blank-check company sponsored by South Mountain Equity Partners that completed its IPO in 2020. The transaction closed in January 2021, with the combined entity retaining the BTRS Holdings name on the Nasdaq. Operating in the B2B fintech and order-to-cash sector, the company serves mid-market and enterprise clients with cloud-based billing solutions. Sign up at SpacDesk for full filing histories, sponsor profiles, and deal timelines on BTRS Holdings and thousands of other SPAC transactions.