Exhibit 99.1 REALTY INCOME ANNOUNCES OPERATING RESULTS FOR THE THREE MONTHS ENDED MARCH 31, 2024 SAN DIEGO, CALIFORNIA, May 6, 2024....Realty Income Corporation (Realty Income, NYSE: O), The Monthly Dividend Company®, today announced operating results for the three months ended March 31, 2024. All per share amounts presented in this press release are on a diluted per common share basis unless stated otherwise. “I am pleased with our first quarter results, as we continue to strengthen our role as real estate ...