Mendell Helium plc focuses on helium production and exploration. The company has an option to acquire M3 Helium Corp., which operates in Kansas and has interests in multiple wells, including the Rost well. Mendell Helium's business model centers on developing helium resources, with operations also extending to Nebraska. The company aims to generate revenue through the production and sale of helium gas, targeting various industrial and commercial customers in the helium market.