MediaTek has overtaken Qualcomm to become the world's largest smartphone chipset vendor in terms of market share for the third quarter of 2020 (Q3 2020). MediaTek has been busy this year with its Dimensity series appearing in numerous budget and midrange smartphones. Qualcomm has remained strong in the 5G and high-end segments though.
https://www.notebookcheck.net/MediaTek-leapfrogs-Qualcomm-as-the-world-s-largest-smartphone-chipset-vendor-thanks-to-huge-growth-in-India-and-Latin-America.512177.0.html