Seven Summit Treks, is an commercial and a largest adventure operating company, based in Kathmandu, Nepal.. especialized in Eight-thousander of Nepal, China, and Pakistan. Established by four Sherpa brothers including Mingma Sherpa, Chhang Dawa Sherpa and Tashi Lakpa Sherpa. Mingma and his brother Chhang Dawa is the first sibling to climbed all 8000ers, Mingma is first and Dawa is second South Asian to do so.