Company: UMBFO
Filing Date: 2025-03-14
Form Type: DEF 14A
Source: 0001193125-25-054504
Chunk: 4

Company: UMB FINANCIAL CORP
Filing Date: 2025-03-14
Form: DEF 14A
Chunk 4
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 advance of the Annual Meeting |

Submit proof of your proxy power (“ Legal Proxy”) from your broker or bank reflecting your UMB common stock holdings, along with your name and email address, to Computershare. Requests for registration must be labeled as “Legal Proxy” and be received no later than 5:00 p.m., Eastern Time, on April 23, 2025. You will receive a confirmation of your registration by email after we receive your registration materials. Requests for registration should be directed to us at the following:

| By email: |     | Forward the email from your broker granting you a Legal Proxy, or attach an image of your Legal Proxy, to legalproxy@computershare.com |
| By mail:  |     | Computershare UMB Financial Corporation Legal Proxy P.O. Box 43001 Providence, RI 02940-3001                                           |

Due to the possibility of delays in mail delivery, you are encouraged to submit mail requests for registration sufficiently in advance of the deadline.

| 2) | Option #2: Register at the Annual Meeting |

For the 2025 proxy season, we will use an industry solution to allow beneficial owners to register online at the Annual Meeting to attend, ask questions and vote. We expect that the vast majority of beneficial owners will be able to fully participate using the control number received with their voting instruction form. Please note, however, that this option is intended to be provided as a convenience to beneficial owners only and there is no guarantee that this option will be available for every type of beneficial owner control number. The inability to provide the option to any or all beneficial owners shall in no way impact the validity of the Annual Meeting. Beneficial owners should choose the “Register in Advance” option / Option #1, above, if they prefer to use the traditional, paper-based option or if they wish to ensure full participation. Regardless of your choice, all beneficial owners are encouraged to visit www.meetnow.global/M9HAD9F in advance of the meeting for more information on the available options and registration instructions. The online meeting will begin promptly at 9:00 a.m., CDT. We encourage you to access the meeting prior to the start time, leaving ample time for the check in. Please follow the registration instructions as outlined in this Proxy Statement. Do I need to register to attend the Annual Meeting virtually? Registration is only required if you are a beneficial owner and intend to ask questions and/or vote your shares at the Annual Meeting. 3

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