Tempus AI's Personalis acquisition is a great strategic fit but raises the risk profile, because Tempus overpaid. Personalis adds longitudinal molecular-response and patient-outcome data that reinforce Tempus's data moat. But at roughly 19 times Personalis's guided 2026 revenue, with 15-20% gross margins and about $100M of cash burn, it adds burn on top of Tempus's own and could take years to become accretive. The thesis needs many years of patience and near-flawless execution. x.com x.comÂ