Chesapeake Energy (CHK): Sales peaked up on increased marketing, gathering and compression revenues. These were more than enough to compensate for the decline in natural gas, oil and NGL revenues. Operating margin compressed, and net income compressed (sic!) even more.
Quite complex activity, even more complicated financing structure, and lots of historical problems. CEO left on April 1, 2013. 211 employees terminated under the voluntary separation program to reduce costs; earnings temporarily hit.