Exhibit 99.1 MSCI Reports Financial Results for Third Quarter and Nine Months 2025 New York – October 28, 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 September 30, 2025 ("third quarter 2025") and nine months ended September 30, 2025 ("nine months 2025"). "Our Q3 results affirm that MSCI's indexes, analytics, and data are foundat ...