Joanne Quan - 16 Jan 2025 Form 4 Insider Report for Mirum Pharmaceuticals, Inc. (MIRM)

Role: CHIEF MEDICAL OFFICER
Signature: /s/ Judit Ryvkin, Attorney-in-Fact
Issuer symbol: MIRM
Transactions as of: 16 Jan 2025
Net transactions value: -$319,598
Form type: 4
Filing time: 21 Jan 2025, 16:21:33 UTC
Previous filing: 14 Nov 2024
Next filing: 23 Jan 2025
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MIRM	Common Stock	Options Exercise		+12,500	+10593%		12,618	16 Jan 2025	Direct	F1
transaction	MIRM	Common Stock	Sale	$319,598	-6,969	-55%	$45.86	5,649	17 Jan 2025	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MIRM	Restricted Stock Units	Options Exercise	$0	-12,500	-33%	$0.000000	25,000	16 Jan 2025	Common Stock	12,500		Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.
F2	Shares sold to cover tax withholding obligations associated with the vesting of restricted stock units.
F3	1/3rd of the shares subject to the restricted stock units shall vest on each anniversary of January 16, 2024 (the "Vesting Commencement Date"), such that the entire award will be vested on the three-year anniversary of the Vesting Commencement Date.