Heartflow shares fell about 17% on Friday, a day after the heart-diagnostics software company reported faster sales growth and raised its forecast for the year. The stock traded at $49.49 at 2:58 p.m. Eastern time, down $10.43, or 17.4%, from Thursday’s close of $59.92.
Heartflow, whose artificial intelligence software helps doctors diagnose coronary artery disease, said after the market closed on Thursday that third-quarter revenue rose 57% from a year earlier to $72.9 million. Its net loss narrowed to $11.5 million, or 13 cents a share, from $50.9 million a year earlier. The company now expects 2026 revenue of $262 million to $264 million, up from its earlier forecast of $246 million to $250 million.
Chief Executive John Farquhar called the quarter “excellent” and said revenue growth sped up for the third quarter in a row.
Cedar found no statement from Heartflow on the share move and could not confirm a reason for the drop. From a close of $20.49 on March 13, the shares nearly tripled to $60.53 on Oct. 29, their highest close since the stock began trading in August 2025.
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