BP has taken down two (or more) companies with it, RIG and DO.
From April 20, 2010, the day of the Deepwater Horizon oil spill:
RIG is Transocean LTD, market cap of $15.90B. EPS is 9.01. P/E is 5.51.
DO is Diamond Offshore Drilling, market cap of $8.48B. EPS 9.48. P/E is 6.44.
BP is BP (ADR), market cap of $85.68B. EPS 6.36. P/E is 4.30.
Looking at the spreads, they are starting to outperform BP.