Energy investors have been eagerly anticipating a wave of mergers to hit the sector. That's almost always what happens when energy prices plunge. However, this time, the wave has yet to hit.

This week, rumors were flying of merger offers being on the table, which sent several energy stocks soaring higher.  According to S&P Capital IQ data, Penn Virginia Corporation (NASDAQOTH:PVAHQ), Williams Companies (NYSE:WMB), and Magnum Hunter Resources (NASDAQOTH:MHRCQ) were the biggest energy movers this week. To learn more about the news that drove these stocks, check out the slideshow below.