In order to prevent the largest shareholders from selling off their shares right after the listing and thus causing possible losses to general shareholders, the Exchange prohibits the sales of the Stocks held by the largest shareholders which must be deposited with the Korea Securities Depository for 6 months from the date of listing.

Additionally, the stocks acquired from the largest shareholder and the new stocks acquired by the way of third party allotment within 1 year prior to the application date for listing eligibility review are subject to safe custody for 6 months from the date of listing.

In order to protect investors from losses that may occur due to the sale of shares owned by largest shareholders etc., KRX requires such shareholders to undertake a lock-up period of 6 or more than 6 months.