A Durham-based health care company has raised $2.8 million in a private equity offering, according to a filing Friday with the Securities and Exchange Commission.

Zenomics Inc. raised the money from one investor, according to the filing.

Zenomics, which was founded in 2015, is developing a microneedle transdermal patch technology for diabetes, which is able to sense blood glucose levels and respond with appropriate concentrations of insulin.

The company’s chief executive officer is Xuejie Wang.

Companies relying on a Reg D exemption do not have to register their offering of securities with the SEC, but they must file what’s known as a Form D electronically after they first sell their securities.