Edwin Jonathan Tucker - Sep 29, 2021 Form 4 Insider Report for Mirum Pharmaceuticals, Inc. (MIRM)

Role: Chief Medical Officer
Signature: /s/ Jody Howe, Attorney-in-Fact
Stock symbol: MIRM
Transactions as of: Sep 29, 2021
Transactions value $: -$26,265
Form type: 4
Date filed: 10/1/2021, 08:00 PM
Previous filing: May 12, 2021
Next filing: Nov 15, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MIRM	Common Stock	Award	$0	+8.13K	+20.83%	$0.00	47.1K	Sep 29, 2021	Direct	F1
transaction	MIRM	Common Stock	Sale	-$26.3K	-1.36K	-2.89%	$19.26	45.8K	Oct 1, 2021	Direct	F2

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

Explanation of Responses:

Id	Content
F1	The shares became issuable upon the satisfaction of certain performance conditions that were established at the time of the Compensation Committee's approval of a performance-based restricted stock unit award on March 9, 2021. On September 29, 2021, the Compensation Committee certified the achievement of the performance criteria resulting in the vesting of 4,062 shares on September 29, 2021 and 4,063 shares on June 30, 2023.
F2	Shares sold to cover tax withholding obligations associated with the vesting of the performance-based restricted stock unit award granted to the Reporting Person on March 9, 2021.

Content

The shares became issuable upon the satisfaction of certain performance conditions that were established at the time of the Compensation Committee's approval of a performance-based restricted stock unit award on March 9, 2021. On September 29, 2021, the Compensation Committee certified the achievement of the performance criteria resulting in the vesting of 4,062 shares on September 29, 2021 and 4,063 shares on June 30, 2023.

Shares sold to cover tax withholding obligations associated with the vesting of the performance-based restricted stock unit award granted to the Reporting Person on March 9, 2021.