Sec Form 4 Filing - Chang Carmen @ Mirum Pharmaceuticals, Inc. - 2023-06-13

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL OMB Number: 3235-0287 Expires: November 30, 2011 Estimated average burden hours per response... 0.5

1. Name and Address of Reporting Person Chang Carmen 2. Issuer Name and Ticker or Trading Symbol Mirum Pharmaceuticals, Inc. [ MIRM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2855 SAND HILL ROAD 3. Date of Earliest Transaction (MM/DD/YY) 06/13/2023 (Street) MENLO PARK, CA94025 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 06/13/2023 J( 1 ) 2,000,000 D $ 0 2,186,243 I See Note 2 ( 2 ) Common Stock 06/13/2023 J( 3 ) 30,000 A $ 0 30,000 I See Note 4 ( 4 ) Common Stock 06/13/2023 J( 5 ) 30,000 D $ 0 0 I See Note 4 ( 4 ) Common Stock 06/13/2023 J( 6 ) 135 A $ 0 135 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Chang Carmen 2855 SAND HILL ROAD MENLO PARK, CA94025 X Signatures /s/ Louis Citron, attorney-in-fact 06/15/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )New Enterprise Associates 16, L.P. ("NEA 16") made a pro rata distribution of 2,000,000 shares of Common Stock of the Issuer to its general partner and limited partners for no consideration on June 13, 2023. ( 2 )The Reporting Person is a manager of NEA 16 GP, LLC ("NEA 16 GP"), which is the sole general partner of NEA Partners 16, L.P. ("NEA Partners 16"). NEA Partners 16 is the sole general partner of NEA 16, the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of Section 16 of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA 16 in which the Reporting Person has no pecuniary interest. ( 3 )NEA Partners 16 received 30,000 shares of Common Stock of the Issuer in the distribution made by NEA 16 on June 13, 2023. ( 4 )The Reporting Person is a manager of NEA 16 GP, which is the sole general partner of NEA Partners 16, the direct beneficial owner of the securities. The Reporting Person disclaims beneficial ownership within the meaning of the Securities Exchange Act of 1934, as amended, or otherwise of such portion of the securities held by NEA Partners 16 in which the Reporting Person has no pecuniary interest. ( 5 )NEA Partners 16 made a pro rata distribution for no consideration of an aggregate of 30,000 shares of Common Stock of the Issuer to its limited partners on June 13, 2023. ( 6 )The Reporting Person received 135 shares of Common Stock of the Issuer in the distribution made by NEA Partners 16 on June 13, 2023.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.