HCM IV Acquisition Corp. (Nasdaq: HACQ) is a blank-check company currently in its IPO registration phase, having filed an amended S-1/A with the SEC on January 20, 2026. The SPAC is the fourth vehicle launched under the HCM sponsor family, which has concentrated its dealmaking activity in the healthcare sector. The "IV" designation signals a serial management team with prior SPAC experience across predecessor vehicles. As of the filing date, HACQ has not yet completed its initial public offering and remains in the pre-listing stage. The healthcare focus positions it within one of the more active SPAC verticals for life sciences, medtech, and health services targets. Sign up at SpacDesk for full filing history, sponsor profiles, and real-time deal tracking on HACQ and the broader SPAC universe.