Rocket Lab’s Neutron medium-lift rocket faces significant schedule compression after multiple prior slips, most recently triggered by a January 2026 first-stage tank rupture during testing. In its August 10 earnings call, CEO Peter Beck explicitly stated that the window for an end-of-year launch is “narrowing,” noting that delivery to Launch Complex 3 in Q4 2026 enables pad testing, wet dress rehearsals, and a critical nine-engine Archimedes first-stage static fire—milestones that historically consume substantial calendar time before any attempt. Traders assign 91.5% probability to no launch by December 31 because the company is prioritizing risk retirement and long-term cadence over an aggressive debut, consistent with industry patterns for new reusable vehicles. A flawless final integration and testing sequence could theoretically enable a late-December flight, but current hardware status and executive commentary make that outcome improbable.