* Oscar raised full-year 2026 operating income guidance to USD 500 million–USD 700 million, tightening its medical loss ratio view to 81.5%–82.5%. * Oscar Health posted Q2 net income attributable to shareholders of USD 361.81 million, swinging from a loss a year earlier; diluted EPS was USD 1.10. * Revenue more than doubled to USD 4.88 billion, while operating income swung to USD 388.64 million. * Medical loss ratio improved 11.9 percentage points to 79.2% on disciplined pricing and USD 164 million of favorable prior-period reserve development. * Effectuated membership climbed to 2,963,002 as of June 30, up 46.9% from a year earlier.