Neuroptix, a US-based company for diagnosing Alzheimer’s disease, has raised half of its planned $9.1m round.
A regulatory filing said six investors had provided $4.6m for Neuroptix.
Neuroptix was founded in 2001 and raised $18.5m in 2008 for its series B round venture capital firms Inventages Venture Capital, which is backed by chocolate company Nestle, and Rockport Venture Partners.