Baek did not disclose the name of the companies and the vaccine brand to be produced in Korea, saying details will be disclosed only after the contract is finalized. Globally approved Covid-19 vaccines include those from AstraZeneca, Pfizer and Moderna. Investors speculated the candidate to be GC Pharma given its facility and production technology. GC Pharma shares gained 10.05 percent to close at 396,000 won. Other potential producers include Hanmi Pharm, ST Pharm and SK Bioscience. Shares of ST Pharma and Hanmi Pharm each ended 5 percent higher SK Bioscience fell 4 percent as it was crossed of the list since it is already commissioned to produce a vaccine for AstraZeneca. It also plans to produce a vaccine for Novavax from June.