Full-Year 2024 Guidance MSCI’s guidance for the year ending December 31, 2024 (“Full-Year 2024”) is based on assumptions about a number of factors, in particular related to macroeconomic factors and the capital markets. These assumptions are subject to uncertainty, and actual results for the year could differ materially from our current guidance, including as a result of the uncertainties, risks and assumptions discussed in the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of our Annual Report on Form 10-K, as updated in quarterly reports on Form 10-Q and current reports on Form 8-K filed or furnished with the SEC. See “Forward-Looking Statements” below. Guidance Item Guidance for Full-Year 2024 Operating Expense $1,300 to $1,340 million Adjusted EBITDA Expense $1,130 to $1,160 million Interest Expense (including amortization of financing fees)(1) $185 to $189 million Depreciation & Amortization Expense $170 to $180 million Effective

MSCI (MSCI) reported Q4 adjusted earnings Tuesday of $3.68 per share, up from $2.84 a year earlier. Analysts polled by Capital IQ expected $3.29. Operating revenue for the quarter ended Dec. 31 was $690.1 million, up from $576.2 million a year earlier. Analysts surveyed by Capital IQ estimated $662.6 million. MSCI said it has raised its quarterly dividend to $1.60 per share, up from $1.38 in the previous quarter. The higher dividend is payable on Feb. 29 to shareholders of record on Feb. 16.