Top trader Najarian buys two energy stocks

Employees of SunEdison install photovoltaic solar panels in Hillsborough, New Jersey.
Robert Nickelsberg | Getty Images

CNBC "Halftime Report" trader Jon Najarian bought shares of SunEdison in his model portfolio Wednesday, after spotting unusual options activity. 

SunEdison (SUNE), the biggest developer of clean energy, has seen its stock plunge more than 75 percent since June, following concerns over weak revenue trends as the company embarks on a buying spree, acquiring many of its competitors. 

As the stock underperforms, here's how the options trader is positioned for a potential move ahead: