With regard to Mahindra, I do believe they are #3 in the USA and have been for a couple of years. But if I may compare this to a marathon, JD and Kubota cross the finish line and #3 Mahindra is trailing and is no where in sight. Some time later Mahindra crosses the line, well ahead of some significant competition and truly in 3rd, but not threatening the first and second place finishers. Even so, it is an accomplishment.
Worldwide, Mahindra is a giant in tractor manufacturing and sales. It helps that they have such a significant market share in India, which is a huge market.
As for Branson USA, they are profitable and have been for the last several years. Many of the minor brands are not, but are being propped up by a corporate parent hoping for future prosperity. They are a small player, but are adding products, making improvements in existing models and only a couple years ago opened a new west coast distribution center. They seem satisfied with a slow and steady growth. As for the TYM deal, they are so far being run as separate companies in the USA and that is what we expect to continue. Certainly it would make sense for TYM and Branson to share some product (at least the Cummins style Branson engine) in the future.
As to Neil at Messick's comment about whether Mahindra was taking market share from the minor brands or grabbing some from Kubota and JD, it is really hard to know. It's above my pay grade. They are gaining share, but I can't say from where.
Back to the original question, will some tractor makes not survive? It's anyone's guess. What we have seen more commonly is not tractor makers failing, but instead we see retail failures. For example, LS built a lot of the Montana line. Montana failed, but not LS. Century was a brand that was made by Branson (Kukje), Century failed, but Branson persisted. Scorpion was TYM, then we have Farmtrac...etc. It's not an easy thing to break into a market in the USA and to gain share. A lot of folks can build a good tractor. Bringing it to market successfully is another matter.