Fortinet Q4 net up 30% as billings jump

Fortinet Inc.'s fourth-quarter profit rose 30% as the network-security company said billings jumped.

Shares jumped 15% after hours to $22.22. Through the close, the stock was down 21% in the past six months.

Fortinet, the maker of FortiGate products, has posted stronger revenue for more than two years. The company's profits stumbled