Tutor Perini Corporation (TPC) reported that it has acquired one of New York’s largest providers of Electrical and Mechanical services and systems, GreenStar Services Corporation, which has a current backlog of approximately $1.2 billion dollars and posted revenues in fiscal year 2010 of approximately $560 million dollars.

TPC also announced that it has completed the acquisition of Lunda Construction Company. Lunda, which has a current backlog of approximately $400 million and posted revenues of approximately $400 million in fiscal year ended December 31, 2010, and it is in the top tier of heavy civil contractors engaged in the construction, rehabilitation and maintenance of bridges, railroads, and other civil structures in the Midwest and throughout United States.

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JA Solar Holdings Co., Ltd (JASO) reported that it has entered into a definitive agreement to acquire 100% ownership interest in Silver Age Holdings Limited, a British Virgin Islands company that owns 100% of Solar Silicon Valley Electronic Science and Technology Co., Ltd., a leading producer of solar wafers based in China.