Onejoon

Onejoon makes industrial furnaces, large heat-treatment kilns that use heat and gas to chemically transform raw materials into advanced specialty materials, and supplies them on an order-by-order basis to manufacturers of battery cathode and anode materials, among other advanced-materials producers.

It also provides full turnkey engineering services, covering design, procurement, construction, and commissioning of entire production lines. Listed on KOSDAQ, Korea's tech and small-cap board, the company earns the majority of its revenue from domestic customers, with a smaller share coming from overseas.