X0508 4 2024-05-21 0001289419 Morningstar, Inc. MORN 0001324069 Mansueto Joseph D 22 W. WASHINGTON CHICAGO IL 60602 1 1 1 0 Executive Chairman 1 Common Stock 2024-05-21 4 S 0 1325 296.8146 D 10686606 D Common Stock 2024-05-21 4 S 0 3333 297.7415 D 10683273 D Common Stock 2024-05-21 4 S 0 1365 298.7870 D 10681908 D Common Stock 2024-05-21 4 S 0 1733 299.9281 D 10680175 D Common Stock 2024-05-21 4 S 0 230 300.5481 D 10679945 D Common Stock 2024-05-22 4 S 0 2064 299.5188 D 10677881 D Common Stock 2024-05-22 4 S 0 2703 300.5736 D 10675178 D Common Stock 2024-05-22 4 S 0 256 301.1135 D 10674922 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 November 17, 2023. The transaction was executed in multiple trades at prices ranging from $296.1700 to $297.1700. 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 $297.1900 to $298.1900. 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 $298.3200 to $299.3100. 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 $299.4900 to $300.4900. 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 $300.4950 to $300.6000. 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 $299.0400 to $300.0100. 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 $300.0650 to $301.0500. 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 $301.0750 to $301.1600. 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. /s/ Kathleen Peacock, by power of attorney 2024-05-23