Wiechmann Andrew C. 4

What Happened Andrew C. Wiechmann, Chief Financial Officer of MSCI Inc. (MSCI), received an award of performance stock options (PSOs) covering 5,639 shares. The Form 4 reports an acquisition/award (code A) of 5,639 derivative securities on January 26, 2026 at $0.00 (reported as a derivative grant, not a cash purchase). The PSOs were certified as having met their performance condition and are scheduled to vest on February 2, 2026, subject to continued service.

Key Details

• Transaction date: January 26, 2026 (Form 4 filed January 28, 2026 — timely filing).
• Reported amount: 5,639 performance stock options; reported price $0.00 (derivative award).
• Shares owned after transaction: Not specified in the filing.
• Footnote: PSOs were originally granted Feb 2, 2023, cover performance period Jan 1, 2023–Dec 31, 2025; performance condition was certified on Jan 26, 2026 and the PSOs vest on Feb 2, 2026 subject to continued service.
• Transaction type: Derivative award of PSOs (code A).

Context This is a compensation-related award (performance stock options) rather than an open-market buy or sell. The award reflects that the performance condition for the 2023–2025 period was met; the options are scheduled to vest in February 2026 and do not represent immediate share ownership or a sale. Such awards are common executive compensation and do not by themselves indicate an insider buying or selling shares.