Maybach's logo includes the green and yellow M's.
Movistar's logo is a green M with subtle yellow highlights.
BP
Nvidia
Petrobras
Green bay packers
Monster
mountain dew
Starbucks has what is a debatable green letter t within it's logo. The logo itself is green and rests on a white background. Though the lettering for "Starbucks" it is actually white, it is a cutout from the green logo, and thus, when examined, can be taken as green.
Marmelbeene Corp. For App game "Marmels"
quicksilver logo, designed by the company founder Alan Green in Torquay, Victoria, Australia in the early 1970s
greenpeace