Shares in United Online Inc. hit a 52-week high Wednesday after the Internet company posted slight increases in profit and revenues and upped its second quarter guidance anticipating robust ad spending.

United Online reported first quarter net income of $13 million (19 cents per share), a 3 percent increase from $12.7 million (20 cents) in the same period a year earlier. Excluding one-time charges, the company said earnings would have been 27 cents per share.

Revenue for the Woodland Hills-based Internet access provider increased 2 percent to $130 million, thanks mainly to advertising revenue doubling to $34 million during the quarter as well as an increase in membership, the company said.

United Online also increased its second-quarter guidance to between $128 million and $132 million, exceeding Wall Street expectations of $125 million, according to a Thomson Financial poll.

Shares in United Online shot up 11 percent, or $1.60, in afternoon trading Wednesday on the Nasdaq.