“Before us, there was no transparency whatsoever, and therefore nobody knew how much a drug cost,” said the entrepreneur and investor during an appearance at The daily show. “These pharmacy benefit managers dictate prices as they please. They are essentially stealing money from employers and employees. So we went there and asked, ‘What’s missing? Transparency.'”

Cost Plus works directly with drug manufacturers to cut out middlemen and lower prices. For consumers, the price of each drug includes a 15 percent markup as a profit margin, a $3 pharmacy processing fee and a $5 shipping fee. Cost Plus is also transparent about what it pays for its drugs. The company now sells about 2,500 drugs, including some brand-name drugs, and works with a growing number of health systems. It also makes its own generics and several drugs that are in short supply at a 22,000-square-foot manufacturing facility in Dallas.

“We are about to have a significant impact on the drug market,” Cuban said, noting that transparent business practices have helped drive down drug prices. He cited a chemotherapy drug that would normally cost $2,000 at most pharmacies but that his company offered for less than $30.

“We’re going to publish all the contracts,” he told Stewart. “Never before have my companies said, ‘If you want to do business with us, if this hospital system wants to work with my companies, whatever it may be, we’re going to publish them and put them online so anyone can see all of our pricing.'”

“There’s no reason for the big companies that control 90% of prescriptions written, there’s no reason for them to exist,” he said. “There are others, the so-called pass-through PBMs, that show you all your claims, all your data, all your prices, and all at a fraction of the price. So there’s the potential for disruption.”