Christopher Peetz - 21 Jan 2026 Form 4 Insider Report for Mirum Pharmaceuticals, Inc. (MIRM)

Reporting relationship: CHIEF EXECUTIVE OFFICER, Director
Issuer ticker: MIRM
Reported as of: 21 Jan 2026
Net transaction value: -$662,422
SEC form: 4
Accepted by SEC: 23 Jan 2026, 17:30:05 UTC
Prior SEC filing: 02 Jan 2026
Next SEC filing: 27 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Judit Ryvkin, Attorney-in-Fact

Key filing fact

Christopher Peetz filed Form 4 for Mirum Pharmaceuticals, Inc. (MIRM) on 23 Jan 2026.

Key facts

This page summarizes Christopher Peetz's Form 4 filing for Mirum Pharmaceuticals, Inc. (MIRM).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 23 Jan 2026, 17:30.

Change

Previous filing in this sequence was filed on 02 Jan 2026.
Current net transaction value: -$662,422.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001614740 Primary reporting owner

Peetz Christopher

Relationship: CHIEF EXECUTIVE OFFICER, Director
Address: C/O MIRUM PHARMACEUTICALS, INC., 989 E HILLSDALE BLVD., SUITE 300, FOSTER CITY
Signature: /s/ Judit Ryvkin, Attorney-in-Fact
Signature date: 23 Jan 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

MIRM transaction

Common Stock

Options Exercise

Transaction value
Shares: +12,797
Change %: +8.1%
Price
Shares after: 170,831
Date: 21 Jan 2026
Ownership: Direct
Footnotes: F1

MIRM transaction

Common Stock

Sale

Transaction value: $662,422
Shares: -7,098
Change %: -4.2%
Price: $93.33
Shares after: 163,733
Date: 22 Jan 2026
Ownership: Direct
Footnotes: F2

MIRM holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 187,500
Date: 21 Jan 2026
Ownership: By The Peetz Family Trust

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

MIRM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value: $0
Shares: -12,797
Change %: -33%
Price: $0.000000
Shares after: 25,593
Date: 21 Jan 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,797
Exercise price
Footnotes: F1, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Footnote F2

Shares sold to cover tax withholding obligations associated with the vesting of restricted stock units.

Footnote 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.