MADISON, Wis. (AP) -

WPS Health Insurance has notified the state it will begin laying off about 450 employees at the end of March.

The layoffs are mainly because the company lost two major federal contracts. In Monona and Madison, 250 people are affected and 201 people in Wausau are affected. The Monona-based nonprofit health insurer anticipates additional layoffs if it doesn't find new business to replace the federal contracts.

WPS CEO Mike Hamerlik to the State Journal last November that up to 600 employees could lose their jobs in 2013. The company lost contracts to process Medicare claims as well as manage care claims for the military in 21 states.

The contracts made up about 40 percent of the company's annual revenue last year.