secwatch.observer — SEC 8-K summary
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Issuer:     MBX Biosciences, Inc. (MBX)
CIK:        0001776111
Form:       8-K
Filed at:   2025-09-26T23:59:59+00:00
Accession:  0001193125-25-220432
Event type: other_material
Sentiment:  neutral
Materiality: 0.60
Item codes: 1.01, 9.01
LLM model:  deepseek-v4-flash:cloud@v2

MBX Biosciences raises $187.5M via public offering of 11.1M shares at $18.00
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- Offering of 11,108,055 shares at $18.00 per share; underwriters have 30-day option for up to 1,666,208 additional shares.
- Net proceeds of $187.5M; funds to advance three clinical-stage programs plus discovery R&D and corporate purposes.
- Underwriting agreement with J.P. Morgan and Jefferies as representatives; offering closed September 26, 2025.
- Registration statements on Form S-1 and S-1MEF became effective September 24, 2025.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1776111/000119312525220432/0001193125-25-220432-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1776111/000119312525220432/mbx-20250924.htm
  HTML page:      https://secwatch.observer/filing/0001193125-25-220432

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