IPO Offer Price vs Opening Price Calculator
The IPO price is not necessarily the price most people pay. Put in the offer price and the price when trading opened, and see how many shares the same money buys either way.
Updated
Educational purposes only.
Educational only, not investment advice. This compares two prices you enter and does not predict anything. Whole shares are assumed. Historical figures do not indicate future results.
Educational purposes only. These calculators illustrate concepts and do not constitute investment advice. Read our disclaimer
StockCram is not a broker-dealer, investment adviser, or financial institution. All content is for educational and informational purposes only and should not be construed as personalized investment advice. Consult a qualified financial professional before making investment decisions. Past performance does not guarantee future results.Embed this calculator on your site
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<a href="https://www.stockcram.com/tools/calculators/ipo-offer-vs-opening-price-calculator" target="_blank" rel="noopener">IPO Offer Price vs Opening Price Calculator</a>
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</p>How It Works
Enter the offer price
The price the company sold shares at to allocated buyers, set the night before trading opened.
Enter the opening price
The price when shares actually started trading publicly the next morning.
Enter an amount
How much you want to compare across the two prices.
Read the share counts
The calculator shows how many whole shares that amount buys at each price, and the difference between them.
Frequently Asked Questions
The IPO price (or offer price) is what the company sells shares at to allocated buyers, set the night before trading begins. The opening price is the first price at which shares trade publicly the next morning. They are frequently different, because the opening price is set by supply and demand once anyone can buy.
Sometimes, but allocation is limited. Institutional investors typically receive most of a hot IPO, though some brokerages run participation programmes that allocate shares to retail customers at the offer price. Allocation is never guaranteed, and most people who buy on the first day buy after trading opens, at the market price.
If demand at the offer price exceeds the shares available, the first public trade clears higher. The gap between the offer price and the opening price is often called the "pop". It is not guaranteed — some IPOs open below their offer price, which is sometimes described as breaking issue.
Yes. If demand is weaker than the underwriters expected, shares can open below the offer price. This calculator handles that case: enter an opening price lower than the offer price and it will show that the same money buys more shares after the open, not fewer.
No. It compares two prices you enter and reports the arithmetic difference between them. It contains no forecast, no recommendation, and no assumption about any particular company or listing.
Whole shares are what most brokerages actually fill on an IPO allocation, so rounding down reflects the realistic outcome. Some brokers support fractional shares in ordinary secondary-market trading, which would change the share counts slightly.