Company: MIRM
Filing Date: 2025-04-14
Form Type: DEF 14A
Source: 0001759425-25-000022
Chunk: 3

Company: Mirum Pharmaceuticals, Inc.
Filing Date: 2025-04-14
Form: DEF 14A
Chunk 3
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 about obtaining your control number or a proxy to vote.

The Annual Meeting will begin promptly at 9:00 a.m. (Pacific Time).

Whether or not you participate in the Annual Meeting, it is important that you vote your shares.

4. Will a list of record stockholders as of the Record Date be available?

For the ten days ending the day prior to the Annual Meeting, a list of our stockholders of record as of the close of business on the Record Date will be available for examination by any stockholder of record for any purpose germane to the Annual Meeting at our corporate headquarters during ordinary business hours. To access the list of record stockholders during the 10 days ending the day prior to the Annual Meeting, stockholders should contact the Corporate Secretary at 989 East Hillsdale Boulevard, Suite 300, Foster City, California 94404.

#### 5.

#### Who can vote at the Annual Meeting?
Only stockholders of record at the close of business on the Record Date will be entitled to vote at the Annual Meeting.

Stockholder of Record: Shares Registered in Your Name

If on the Record Date your shares were registered directly in your name with our transfer agent, Equiniti Trust Company, LLC, then you are a stockholder of record. As a stockholder of record, you may vote in person at the meeting or vote by proxy. Whether or not you plan to attend the meeting, we urge you to fill out and return the proxy card that you may request or that we may elect to deliver at a later time or vote by proxy over the telephone or on the internet as instructed below to ensure your vote is counted.

#### 4Mirum Pharmaceuticals2025 Proxy Statement

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

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

If on the Record Date your shares were held, not in your name, but rather in an account at a brokerage firm, bank or other similar organization, then you are the beneficial owner of shares held in “street name” and the Notice is being forwarded to you by that organization. The organization holding your account is considered to be the stockholder of record for purposes of voting at the Annual Meeting. As a beneficial owner, you have the right to direct your broker, bank or other agent regarding how to vote the shares in your account. You must follow the instructions provided by your brokerage firm, bank or other similar organization for your bank, broker or other stockholder of record to