Cybersecurity startup Dragos Inc. has raised a $200 million funding round co-led by a BlackRock Inc. fund and Koch, Inc. Inc., an investment that gives the cybersecurity startup a nearly $2 billion valuation.

Dragos focuses on the operational technology of industrial control systems, unlike traditional security systems that protect mainly computer networks. The startup works with companies that monitor oil and gas, manufacture chemicals, perform mining and handle production line management.

“The market opportunity is so much larger than anyone else realized,” Dragos Chief Executive Officer Robert M. Lee said. “BlackRock and Koch saw that.” About half of the new funding comes from those two investors, the company said.

Lee, a former U.S. Air Force cyberwarfare operations officer, said the six-year-old Dragos wasn’t looking to raise more cash, but that the investors approached the company. Dragos raised $110 million last year at a $400 million valuation. Lee said the latest funding round, which more than quadruples the startup’s valuation, will set Dragos up to make a public market debut in the next year and a half.

“This is the last round we need to be able to go public,” he said.