At what price ipo shares get well on listing day if order is placed during pre open market?

  1. If listing price is equal or higher than the price you order to sell in pre-open; your shares are sold at the listing price.
  2. If listing price is lower than your sell order price in pre-open market, your order will be cancelled.

Is it true?

On listing day price discovery happens during pre open which will be from 9 to 9.45 and at close of preopen ie at 9.45 opening price will be decided based on demand and supply, this process is similar to everyday pre open which happens from 9 to 9.07/08 and nothing different except the time duration. Can check here for more on pre open.

Also if your order is not matched, it will not be cancelled but carried over to normal trading session.