Usually, investors of an IPO get thier shares credited to thier demat account a day before the company’s listing on the stock market.
There is a lengthy process that is carried out when a company decides to move for an IPO. Its where all the determination and allocation of shares take close to months to have a smooth transition. However, the duration at which a trader or investor would receive the shares of a company would be a day before the company’s listing on the stock market. However, the duration can vary based on its IPO parameters or other delays caused by the listing procedures.