Exhibit 99.1 MSCI Reports Financial Results for Second Quarter and Six Months 2025 New York – July 22, 2025 – MSCI Inc. ("MSCI" or the "Company") (NYSE: MSCI), a leading provider of critical decision support tools and services for the global investment community, today announced its financial results for the three months ended June 30, 2025 ("second quarter 2025") and six months ended June 30, 2025 ("six months 2025"). Financial and Operational Highlights for Second Quarter 2025 (Note: Unless otherwise note ...