secwatch.observer — SEC 8-K summary
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Issuer:     Mirum Pharmaceuticals, Inc. (MIRM)
CIK:        0001759425
Form:       8-K
Filed at:   2026-05-18T20:06:05+00:00
Accession:  0001193125-26-228902
Event type: debt
Sentiment:  neutral
Materiality: 0.80
Item codes: 1.01, 2.03, 3.02, 8.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

Mirum issues $690M zero-coupon convertible notes due 2032; exchanges $237M of 2029 notes
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- Issued $690M aggregate principal of 0.00% Convertible Senior Notes due 2032, including $90M option exercise.
- Initial conversion price ~$138.94 per share, a 30% premium over $106.88 closing price on pricing date.
- Concurrently exchanged ~$237.2M of existing 4.00% 2029 notes for $475M cash and ~3.22M shares.
- Net proceeds ~$671.6M; remainder for general corporate purposes and potential acquisitions.
- Notes mature June 1, 2032; redeemable after June 6, 2029 under stock price conditions.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1759425/000119312526228902/0001193125-26-228902-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1759425/000119312526228902/d113366d8k.htm
  HTML page:      https://secwatch.observer/filing/0001193125-26-228902

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer