Conagra is buying Pinnacle Foods in a cash-and-stock deal valued at about $10.9 billion that will help the food company expand in the frozen food and snacks categories.

Pinnacle’s brands include Birds Eye, Duncan Hines and Hungry-Man. Chicago-based Conagra has brands such as Reddi-wip, Hunt’s, Healthy Choice and Slim Jim.

Pinnacle shareholders will receive $43.11 per share in cash and 0.6494 shares of Conagra Brands stock for each share of Pinnacle held. The transaction also includes Pinnacle’s outstanding debt, the companies said Wednesday.

Pinnacle shareholders are expected to own approximately 16 percent of the combined company.

The deal is targeted to close by the end of the year. It still needs approval from Pinnacle shareholders.

Pinnacle’s stock fell nearly 4 percent in premarket trading, while Conagra’s shares declined 7.1 percent.