Rib-X
AcquiredNew Haven, United States · Founded 2000 · $209.5M raised
- Headquarters
- New Haven, Connecticut
- Founded
- 2000
- Business Model
- B2B
- Total Funding
- $209.5M
- Last Round
- $70.0M Venture RoundFeb 2014
- Rounds
- 5
- Acquisition Date
- Sep 2025
About
Rib-X Pharmaceuticals was an American biopharmaceutical company founded in 2000 in New Haven, Connecticut, focused on the structure-based design and development of novel broad-spectrum antibiotics to treat antibiotic-resistant infections in hospital settings. Its lead candidate, delafloxacin, was later named one of R&D Directions' 100 great investigational drugs of 2009. The company was renamed Melinta Therapeutics in 2013.
Summary
Rib-X is a Biotech company based in New Haven, United States, founded in 2000. It has raised $209.5M in total across 5 rounds, most recently a $70.0M Venture Round round in Feb 2014. Investors include SR One and Euclid SR Partners.
Funding History
Sep 2025
Sign up to see all 6 rounds
Venture Round through Acquisition — per-round amounts, valuations, and who invested in each round.
Investors
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