BTRS Holdings Inc. (Nasdaq: BTRS) is the post-merger entity formed through the combination of South Mountain Merger Corp, a blank-check special purpose acquisition company, and Billtrust, a provider of B2B accounts receivable automation and integrated payment network solutions. South Mountain Merger Corp completed its IPO in 2020, and the business combination closed in January 2021, with the combined company operating under the BTRS Holdings name in the financial technology sector. The August 2019 10-Q filing reflects pre-merger SEC reporting activity by the target entity ahead of the SPAC transaction. For the full filing history, deal timelines, and real-time SPAC analytics on BTRS Holdings and hundreds of other transactions, sign up for a SpacDesk account at spacdesk.com.