IPOS-1MEF filedKardigan Files S-1MEF, Clearing the Last Step Toward Its Biotech IPOCardiovascular biotech Kardigan filed an S-1MEF with the SEC -- a short-form registration used to register additional shares immediately before an offering goes effective. The filing signals Kardigan's IPO is imminent, a sign the biotech listing window is creaking back open alongside tech.Jun 17, 2026