Exhibit 99.1 McKESSON REPORTS FISCAL 2026 FOURTH QUARTER AND FULL YEAR RESULTS, PROVIDES FISCAL 2027 GUIDANCE, AND REAFFIRMS LONG-TERM FINANCIAL GROWTH TARGETS IRVING, Texas, May 7, 2026 - McKesson Corporation (NYSE:MCK) today announced results for the fourth quarter and fiscal year ended March 31, 2026. Fourth Quarter Highlights: Full Year Highlights: Outlook: "McKesson's fourth quarter results reflect the strength of our diversified portfolio and disciplined execution against our strategic priorities. Our ...