InsiderTrades

Form 4 for MIRM Mirum Pharmaceuticals, Inc.

Accepted 2026-09-15 16:10:07 ET · period of report 2026-09-11 · accession 0001197350-26-000010 · 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 2026-09-15 16:10 2026-09-11 MIRM BJERKHOLT ERIC CFO M - OptEx — +18.3K 54.7K +50% —
D 2026-09-15 16:10 2026-09-14 MIRM BJERKHOLT ERIC CFO S - Sale+OE $98.37 -9,943 44.7K -18% -$978.1K
D 2026-09-15 16:10 2026-09-11 MIRM BJERKHOLT ERIC CFO M - OptEx $0.00 -18.3K 0 -100% $0

Purchase Sale Sale after option exercise All abbreviations

Every reported transaction

#TableSecurityDateCodeA/DSharesPriceOwned afterOwnExercise / expiryUnderlyingFootnotes
1 Common Common Stock 2026-09-11 M A 18,333 — 54,688 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 2026-09-14 S D 9,943 $98.37 44,745 D — — (F2) Shares sold to cover tax withholding obligations associated with the vesting of restricted stock units.
3 Derivative Restricted Stock Units 2026-09-11 M D 18,333 $0.00 0 D — · — to — 18,333 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) The restricted stock units vest in a series of three successive equal annual installments beginning on the one-year anniversary of September 11, 2023. (F3) The restricted stock units vest in a series of three successive equal annual installments beginning on the one-year anniversary of September 11, 2023.