Kardigan’s $320M IPO pitch: Three borrowed heart drugs, one proven cardio CEO on June 12, 2026 5-chloro-2-(5-chlorothiophene-2-sulfonylamino)-N-(4-(morpholine-4-sulfonyl)phenyl)benzamide Cardiovascular system IPO Kardigan methionine Myers Squibb MyoKardia Nasdaq KARD sanofi Tassos Gianakakos tonlamarsen +