Billionaire Family Office Snags US$65 Million in HeartFlow as Stock Surges 70% Since IPO

A prominent billionaire family office has quietly acquired US$65 million worth of HeartFlow shares just as the med‑tech company’s stock surged roughly 70% above its IPO price. The purchase means that as of September 30, HeartFlow accounted for 14.9% of that family office's publicly disclosed 13F holdings — signaling a strong conviction in the company’s potential. HeartFlow went public in August 2025, pricing its shares at US$19 apiece in its upsized IPO, and began trading under the ticker “HTFL.” Since listing, investor demand has driven the share price up to around US$32.25, reflecting growing optimism around HeartFlow’s AI‑powered heart‑imaging platform for diagnosing coronary disease. #HeartFlow #AIhealthcare #FamilyOffice #IPOinvestment #SlimScan #GrowthStocks #CANSLIM