** Keurig Dr Pepper KDP.O shares down 3.2% at $34 premarket
** Co to buy Dutch coffee company JDE Peet's JDEP.AS for 15.7 billion euros ($18.4 billion) in cash
** The merged company, aiming to expand its coffee offering to more than 100 countries, plans to separate its beverage and coffee units "as soon as practicable", Keurig said
** YTD, KDP stock up ~9.3%