Why Heartflow Stock Soared Today

HTFL surged 35.70% after the medical diagnostics company raised its full-year revenue guidance to $246-250 million, representing 40-42% growth. The updated forecast marks a sharp acceleration from the prior outlook of 29-32% growth.

The company reported second-quarter revenue of $64.1 million, up 48% year-over-year. Adjusted gross margins expanded to 83.3% from 75.6% in the prior-year period, signaling improving profitability as the business scales.

The guidance increase suggests HTFL is capturing demand faster than management previously anticipated. The margin expansion—nearly 800 basis points—indicates the company is converting revenue growth into profitability gains, a key metric for medical technology firms seeking to prove sustainable unit economics.