BTRS Holdings Inc. (Nasdaq: BTRS) is a business-to-business financial technology company operating under the Billtrust brand, focused on accounts receivable automation and digital payment solutions. The company went public through a merger with South Mountain Merger Corp., a blank-check vehicle sponsored by South Mountain Partners that completed its IPO in 2020, with the combination closing in early 2021. At the time of its December 2022 8-K filing, BTRS was a publicly traded B2B fintech and was subject to a pending going-private transaction with European private equity firm EQT Partners, which had announced the acquisition earlier that year. Sign up on SpacDesk for full filing history, SPAC merger timelines, and post-combination data on BTRS Holdings.