Company: UMBFO
Filing Date: 2025-01-28
Form Type: 8-A12B
Source: 0001193125-25-014368
Chunk: 0

Company: UMB FINANCIAL CORP
Filing Date: 2025-01-28
Form: 8-A12B
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 UMB Financial Corporation (Exact Name of Registrant as Specified in its Charter)

| Missouri                                 |     | 43-0903811                          |
| (State or incorporation or organization) |     | -I.R.S. Employer Identification No. |

1010 Grand Boulevard Kansas City, Missouri 64106 (816) 860-7000 (Address of principal executive offices and zip code) Securities to be registered pursuant to Section 12(b) of the Act:

| Title of each class                               
 to be so registered                               |     | Name of each exchange on which  
 each class is to be registered  |
| Depositary Shares, Each Representing a 1/400th    
 Ownership Interest in a Share of 7.00% Fixed-Rate 
 Reset Non-Cumulative Perpetual Preferred Stock,   
 Series A, par value $0.01 per share and with a    
 liquidation preference of $10,000 per share       |     | The NASDAQ Global Select Market |

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c) or (e), check the following box. ☒ If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d) or (e), check the following box. ☐ If this form relates to the registration of a class of securities concurrently with a Regulation A offering, check the following box. ☐ Securities Act registration statement file number to which this form relates: 333-280190. Securities to be registered pursuant to Section 12(g) of the Act: None.

INFORMATION REQUIRED IN REGISTRATION STATEMENT

| Item 1. | Description of Registrant’s Securities to be Registered. |

Each of the 4,600,000 Depositary Shares (the “Depositary Shares”) of UMB Financial Corporation (the “Company”) being registered hereunder, and each share of the Company’s 7.00% Fixed-Rate Reset Non-CumulativePerpetual Preferred Stock, Series A, par value $0.01 per