Framingham-based construction management firm Perini Corp. has reported first-quarter net income of $39 million, compared to $25.2 million in the same period a year ago, a 55 percent increase.

On a pro forma basis and including Tutor-Saliba, which merged with the company in September, net income and diluted earnings per common share would have been $38.5 million for the first quarter of 2008.

Revenues from construction operations were $1.52 billion for the first quarter of 2009, compared to revenues of $1.26 billion for the first quarter of 2008. The increase in revenues is primarily due to the addition of Tutor-Saliba, the company said. The first quarter of 2009 operating results also include the addition of Keating Building Corp., which was acquired on Jan. 15.