Who is the biggest Helium purchaser?

Could you please elaborate on who the largest purchaser of Helium is in the market? Is it a government entity, a large corporation, or perhaps an individual investor? What factors contribute to their position as the top buyer, and how does this influence the overall Helium market? Additionally, have there been any notable changes in recent times with regards to the identity of the largest purchaser, and if so, what caused these shifts?