Form 4 for MIRM Mirum Pharmaceuticals, Inc.

Accepted 2026-01-23 00:00:00 ET · period of report 2026-01-21 · accession 0001670138-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-01-23	2026-01-21	MIRM	Quan Joanne	Chief MEDICAL Off	M - OptEx	—	+3,334	14.6K	+29%	—
D	2026-01-23	2026-01-22	MIRM	Quan Joanne	Chief MEDICAL Off	S - Sale+OE	$93.33	-1,822	12.8K	-12%	-$170.0K
D	2026-01-23	2026-01-21	MIRM	Quan Joanne	Chief MEDICAL Off	M - OptEx	$0.00	-3,334	6,666	-33%	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-01-21	M	A	3,334	—	14,639	D	—	—	(F1) Each restricted stock unit represents a contingent right to receive one share of common stock (or its cash equivalent, at the discretion of the Issuer).
2	Common	Common Stock	2026-01-22	S	D	1,822	$93.33	12,817	D	—	—	(F1) Each restricted stock unit represents a contingent right to receive one share of common stock (or its cash equivalent, at the discretion of the Issuer).
3	Derivative	Restricted Stock Units	2026-01-21	M	D	3,334	$0.00	6,666	D	— · — to —	3,334 Common Stock	(F1) Each restricted stock unit represents a contingent right to receive one share of common stock (or its cash equivalent, at the discretion of the Issuer). (F3) 1/3rd of the shares subject to the restricted stock units shall vest on each anniversary of January 21, 2025 (the "Vesting Commencement Date"), such that the entire award will be vested on the three-year anniversary of the Vesting Commencement Date.