An oncology startup company based in the Research Triangle Park has raised another $1.1 million in a private equity offering, according to a filing Friday with the Securities and Exchange Commission.

Istari Oncology Inc. raised the money from 10 investors and is seeking to raise another $2.9 million, according to the filing.

It’s the second fund raising for the company this year. In February, it raised nearly $4 million.

The company was founded in 2014 as a Duke University start-up and works to cure recurrent glioblastoma. Executive officers and directors Dani Bolognesi, Henry Friedman and Darell Bigner lead the company.

Bolognesi is the former chief executive officer of Trimeris Inc., which developed AIDS drugs. He is also the director of the Center for AIDS Research at Duke University.

Friedman is a professor of pediatric oncology at Duke while Bigner is a cancer research professor.

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.