Wednesday, April 7, 2021 Business Ollie’s Car Wash acquired by Atlanta-based Mammoth Holdings By Daily Report Staff - April 7, 2021 FacebookTwitterLinkedinEmailPrint Atlanta-based Mammoth Holdings LLC, a conveyor car wash operator, has acquired Baton Rouge-based Ollie's Car Wash, which operates three car washes in the Capital Region. Ollie's founders, Brady a… Already an INSIDER? Sign in.