The chipset industry is massive and 4 years ago tipped the $10 million mark. Qualcott is the major player which despite a setback with an overheating problem in Snapdragon 8 seems likely to remain ahead of competitors. I believe it has 35% of the market, while its nearest rival, Mediatek, which obviously capitalised on the Snapdragon glitch in 2016, has 23% share. Apple comes next with a 15% share despite having few devices list of devices in which chipsets appear.
Noticeably none of these companies is mentioned as optional answers to the question. The driving force behind the growth of the chipset market was LTE. In the mobile sector Intel dominates the chipset market with NVIDIA a contender. New figures show that a big drop in demand and a price war has adversely affected Intel's rivals.