A screen displays the logo and trading information for CVS at the New York Stock Exchange, March 24, 2026. Jeenah Moon | Reuters CVS Health on Wednesday blew past first-quarter earnings and revenue estimates and raised its 2026 guidance, as its once-troubled insurance business showed improvement.  CVS, which operates the nation's largest pharmacy chain, sees full-year profit coming in between $7.30 and $7.50 per share. That's up from a previous guidance of $7 to $7.20 per share.  The company also expects revenue of at least $405 billion in 2026, up from its prior outlook of at least $400 billion.  The majority of that $5 billion increase is "reflective of the tailwinds we're seeing" for insurer Aetna, CVS CFO Brian Newman said in an interview with CNBC. All of the health-care giant's business segments, including insurance, its retail pharmacy and health services unit, surpassed Wall Street's revenue expectations.…