BTRS Holdings Inc. (Nasdaq: BTRS), the B2B accounts receivable automation and integrated payments company formerly known as Billtrust, completed its de-SPAC combination with South Mountain Merger Corp. — sponsored by South Mountain Equity Partners — with the transaction closing in January 2021. The blank-check vehicle priced its IPO in 2020, targeting the financial technology sector. By December 2022, at the time of this 8-K filing, BTRS was in the final stages of a take-private transaction announced by private equity firm EQT earlier that year, marking a relatively brief tenure as a public company following the SPAC merger. Sign up at SpacDesk for the full filing history, sponsor profiles, and deal timelines on BTRS and hundreds of other SPAC transactions.