BTRS Holdings Inc., trading under the ticker SMMC, is the entity associated with South Mountain Merger Corp., a blank-check company that completed its initial public offering in 2020. Sponsored by South Mountain Management LLC, the vehicle targeted the financial technology sector, with a focus on B2B payment automation and accounts receivable solutions. The August 2020 10-Q filing captured the company during its active combination phase, ahead of the announced merger with Billtrust, a cloud-based order-to-cash platform. South Mountain Merger Corp. subsequently closed its business combination with Billtrust in January 2021, transitioning the combined entity to Nasdaq under a new ticker. Visit SpacDesk and sign up for full filings, sponsor profiles, and deal-timeline data on SMMC and hundreds of other SPACs.