Pioneer Merger Corp. (Nasdaq: PACX) is a blank check company that completed its initial public offering in 2021, targeting acquisition opportunities in the technology sector. The company filed an amended quarterly report on Form 10-Q/A with the Securities and Exchange Commission on December 20, 2021, under accession number 0001104659-21-151756. Amended quarterly filings of this type were widespread across the SPAC market in late 2021, frequently reflecting revised warrant accounting treatment following SEC staff guidance issued earlier that year. As of the filing date, Pioneer Merger Corp. remained in its pre-business-combination phase, continuing its search for a suitable acquisition target. Sign up at SpacDesk for full filing history, timeline data, and deal-tracking coverage on PACX.