Statistics can be manipulated to show almost any desired "answer".
There's numbers of units. Total dollars of sales, compacts, AG tractors, construction tractors, lawn/turf equipment.... and so on.
I've heard AGCO claim the lead. (With Massey Ferguson mentioned as THEIR #1 brand worldwide)
Case/IH/NH/Fiat/your name here has enough popular brands to make their claim.
Deere sells large numbers of tractors from little lawn mowers to huge 4WD AG units, and also has their industrial line. They seem to be the most financial "solvent" of the majors.
Kubota has their sales figures that show them as a major power.
I guess it all goes back to what I've been hearing lately....75% of all statistics are made up. /forums/images/graemlins/crazy.gif