MRK will owe SGP a $2.5B breakup fee if the merger falls though because MRK is unable to obtain financing: <a href="http://sec.gov/Archives/edgar/data/64978/000089534509000168/ds8k2_merck.htm" rel="nofollow" target="_blank">http://sec.gov/Archives/edgar/data/64978/000089534509000168/ds8k2_merck.htm</a> If SGP opts out of the merger with MRK because it receives a better offer (e.g. from JNJ), SGP will owe MRK a breakup fee of $1.25B.