BJERKHOLT ERIC 4

4 · Mirum Pharmaceuticals, Inc. · Filed Jan 27, 2026

AI-generated summary of this filing

Updated Jan 27, 2026

Mirum (MIRM) CFO Eric Bjerkholt Sells 1,053 Shares

What Happened

Eric Bjerkholt, Chief Financial Officer of Mirum Pharmaceuticals (MIRM), had restricted stock units convert to common shares on Jan 23, 2026 (2,667 shares) and sold 1,053 shares in an open-market transaction on Jan 26, 2026 for $96.19 each, generating $101,290 in proceeds.
The filing shows 2,667 shares from the conversion were also disposed on Jan 23, 2026 at $0.00 — consistent with shares withheld/surrendered to cover tax withholding obligations tied to the RSU vesting.

Key Details

Transaction dates and prices:
- Jan 23, 2026: Conversion/exercise of derivative (2,667 shares). Same date shows 2,667 shares disposed at $0.00 (tax withholding).
- Jan 26, 2026: Open-market sale of 1,053 shares at $96.19 each; proceeds $101,290.
Shares owned after transaction: Not specified in the provided filing details.
Footnotes of note:
- F1: Each RSU equals a contingent right to one share (or cash equivalent).
- F2: Shares were sold/withheld to cover tax withholding on RSU vesting.
- F3: RSU vesting schedule: 1/3 each year beginning Jan 23, 2024 (full vesting in 3 years).
Filing date/accession: Filed Jan 27, 2026 (appears timely based on transaction dates).

Context

This filing reflects RSU conversion and routine tax withholding plus an open-market sale. The RSU conversion and withholding are administrative results of vesting; the separate market sale generated the reported cash proceeds.
Such sales are often routine (tax-related or liquidity) and do not, by themselves, indicate the insider’s broader view of the company.

Form 4

Period: 2026-01-23

CHIEF FINANCIAL OFFICER

Transactions

Exercise/Conversion
Common Stock
[F1]
2026-01-23+2,667→ 44,794 total
Sale
Common Stock
[F2][F1]
2026-01-26$96.19/sh−1,053$101,290→ 43,741 total
Exercise/Conversion
Restricted Stock Units
[F1][F3]
2026-01-23−2,667→ 2,666 total
→ Common Stock (2,667 underlying)

Footnotes (3)

[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).
[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 23, 2024 (the "Vesting Commencement Date"), such that the entire award will be vested on the three-year anniversary of the Vesting Commencement Date.

Signature

/s/ Judit Ryvkin, Attorney-in-Fact|2026-01-27

1 file