X0508 4 2024-02-01 0001289419 Morningstar, Inc. MORN 0001324069 Mansueto Joseph D 22 W. WASHINGTON CHICAGO IL 60602 1 1 1 0 Executive Chairman 1 Common Stock 2024-02-01 4 S 0 3762 278.8025 D 10938150 D Common Stock 2024-02-01 4 S 0 2566 279.9795 D 10935584 D Common Stock 2024-02-01 4 S 0 598 280.5130 D 10934986 D Common Stock 2024-02-02 4 S 0 220 279.2400 D 10934766 D Common Stock 4752663 I By Trust Common Stock 150000 I By Trust The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 28, 2023. The transaction was executed in multiple trades at prices ranging from $278.3000 to $279.2400. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, Morningstar or a shareholder of Morningstar full information regarding the number of shares and prices at which the transaction was effected. The transaction was executed in multiple trades at prices ranging from $279.3800 to $280.3700. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, Morningstar or a shareholder of Morningstar full information regarding the number of shares and prices at which the transaction was effected. The transaction was executed in multiple trades at prices ranging from $280.3800 to $280.6600. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, Morningstar or a shareholder of Morningstar full information regarding the number of shares and prices at which the transaction was effected. The shares are held in grantor retained annuity trusts for the benefit of the reporting person and his children. The reporting person serves as trustee of the grantor retained annuity trusts. The shares are held in trusts for the benefit of the reporting person's children. The reporting person's spouse is trustee of the trusts. Reflects distribution of 247,032 shares from and contribution of 600,000 shares to grantor retained annuity trusts for the benefit of the reporting person and his children. /s/ Kathleen Peacock, by power of attorney 2024-02-05