U.S. agriculture company Midwestern BioAg has raised more than $15 million in new equity funding from three investors.

Midwestern BioAg has now raised more than $23 million in outside financing.

In March, Minneapolis-based General Mills said it would work with Midwestern BioAg to transition tens of thousands of acres of conventional farmland near Pierre, SD, into organic farmland over the next two years.

As of late 2016, Midwestern BioAg had about 100 employees and annual sales of more than $40 million.