---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-251740"
form_type: "8-K"
ticker: "MIRM"
cik: "0001759425"
company_name: "Mirum Pharmaceuticals, Inc."
filed_at: "2021-08-20T23:59:59+00:00"
generated_at: "2026-06-29T08:42:14.847013+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.35
calibrated_materiality_score: 0.35
confidence: "high"
source: SEC EDGAR
---

# Mirum appoints William Fairey to board, replacing Tiba Aynechi

## Summary
- Tiba Aynechi resigned from the board effective August 19, 2021; no dispute or disagreement cited.
- William Fairey appointed to board effective August 19, 2021; will serve as Class I director through 2023 annual meeting.
- Fairey granted stock option for 34,000 shares vesting over 3 years; annual cash retainer of $40K plus $10K for Audit Committee.
- Fairey brings ~30 years biotech commercial experience; previously at MyoKardia, ChemoCentryx, and Actelion.
- Company preparing for first U.S. product launch; board also appointed Carol Brosgart and Patrick Heron to committees.

## SEC filing metadata
- accession: 0001193125-21-251740
- form_type: 8-K
- ticker: MIRM
- cik: 0001759425
- company_name: Mirum Pharmaceuticals, Inc.
- filed_at: 2021-08-20T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.35
- calibrated_materiality_score: 0.35
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1759425/000119312521251740/0001193125-21-251740-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1759425/000119312521251740/d216866d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-251740
- JSON: https://secwatch.observer/filing/0001193125-21-251740.json
- Plain text: https://secwatch.observer/filing/0001193125-21-251740.txt

## Key facts
- Executive change
  Tiba Aynechi resigned as Director at Mirum Pharmaceuticals, Inc..
  - Action: resigned
  - Role: Director
  source text: On August 16, 2021, Tiba Aynechi, Ph.D. notified the board of directors (the “Board”) of Mirum Pharmaceuticals, Inc. (the “Company”) of her resignation as a director of the Company, effective August 19, 2021.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1759425/000119312521251740/0001193125-21-251740-index.htm
- Executive change
  William Fairey was appointed as Director at Mirum Pharmaceuticals, Inc..
  - Action: appointed
  - Role: Director
  source text: On August 19, 2021, the Board, upon recommendation of the Nominating and Corporate Governance Committee of the Board, appointed William Fairey to the Board, effective immediately.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1759425/000119312521251740/0001193125-21-251740-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.