Company: MIRM
Filing Date: 2025-04-14
Form Type: DEF 14A
Source: 0001759425-25-000022
Chunk: 8

Company: Mirum Pharmaceuticals, Inc.
Filing Date: 2025-04-14
Form: DEF 14A
Chunk 8
---
 are counted as “broker non- votes.”

#### 13.

#### Who is paying for this proxy solicitation?
We will pay for the entire cost of soliciting proxies. In addition to these proxy materials, our directors and employees may also solicit proxies in person, by email, by telephone, or by other means of communication. Directors and employees will not be paid any additional compensation for soliciting proxies. We may also reimburse brokerage firms, banks and other agents for the cost of forwarding proxy materials to beneficial owners.

14. What does it mean if I receive more than one Notice?

If you receive more than one Notice, your shares may be registered in more than one name or in different accounts. Please follow the voting instructions on each of the Notices to ensure that all of your shares are voted.

15. Can I change my vote after submitting my proxy?

Stockholder of Record: Shares Registered in Your Name

Yes. You can revoke your proxy at any time before the final vote at the Annual Meeting. If you are the record holder of your shares, you may revoke your proxy in any one of the following ways:

• You may submit another properly completed proxy card with a later date.

• You may grant a subsequent proxy by telephone or through the internet.

• You may send a timely written notice that you are revoking your proxy to 989 East Hillsdale Boulevard, Suite 300, Foster City, California 94404, Attention: Corporate Secretary. Such notice will be considered timely if it is received at the indicated address by the close of business on the business day one week preceding the date of the Annual Meeting.

• You may attend the Annual Meeting and vote in person. Simply attending the Annual Meeting will not, by itself, revoke your proxy.

Your most current proxy card or telephone or internet proxy is the one that is counted.

Beneficial Owner: Shares Registered in the Name of Broker or Bank

If your shares are held by your broker, bank or other agent, you should follow the instructions provided by your broker, bank or other agent.

#### Mirum Pharmaceuticals2025 Proxy Statement7

### TABLE OF CONTENTS
Questions and Answers About These Proxy Materials and Voting

16. What vote is required for adoption or approval of each proposal and how will votes be counted?

The following table summarizes the minimum vote needed to approve each proposal and the effect of abstentions and broker non-votes.

| Proposal 
 Number   |     | Proposal                   
 Description                |     | Vote Required for Approval                                                                                                                                                  |     | Voting                  
 Options                 |