Exhibit 99.1 REALTY INCOME ANNOUNCES OPERATING RESULTS FOR THE THREE MONTHS ENDED MARCH 31, 2026 SAN DIEGO, CALIFORNIA, May 6, 2026....Realty Income Corporation (Realty Income, NYSE: O), The Monthly Dividend Company , today announced operating results for the three months ended March 31, 2026. All per share amounts presented in this press release are on a diluted per common share basis unless stated otherwise. ® COMPANY HIGHLIGHTS: For the three months ended March 31, 2026: Events subsequent to March 31, 20 ...