Mark Stock and Ron Stock are the co-founders for BigIron Auctions & Realty. Serial entrepreneurs, the brothers are known throughout agricultural and business circles for being innovators in all their business ventures and investments. Diversified agriculture, business services and rural community development have been the hallmarks of their respective career pursuits.

Mark, known for visionary ideas while remaining true to his pragmatic values as a farmer, currently serves as CEO and Chairman of the Advisory Board. He is an active participant in all aspects of the organization, including business development, brand building, and operations. Additionally, Mark is a recognized radio voice throughout the Midwest, he is licensed for auctioneering and real estate in several states and is a past Nebraska Reserve Champion Auctioneer. He has served on several company directory boards, including Proxibid during its formative era.