Markets & instruments

Initial public offering (IPO)

Initial public offering (IPO) is the first sale of a company’s shares to the public, typically followed by those shares beginning to trade on a stock exchange.

What it means

An IPO brings a company’s shares to public investors for the first time. The company sets an offering price through its offering process, but that price is not necessarily the price at which the shares first trade on an exchange. Once trading begins, buyers and sellers determine market prices.

An offering may include new shares issued by the company, existing shares sold by current shareholders, or both. The distinction matters: proceeds from new shares go to the company before offering expenses, while proceeds from existing shares go to the selling shareholders. An IPO can raise capital for the company, give existing holders a way to sell shares, and establish a public market for the stock.

How it is calculated

An IPO is an event, not a single financial ratio. One useful calculation is the amount raised through newly issued shares:

Gross company proceeds (US$) = new shares issued × IPO offer price (US$ per share)

  • Gross company proceeds: money attributable to the company’s new shares before underwriting fees and other offering expenses, measured in US$.
  • New shares issued: the number of newly created shares sold in the offering, measured in shares. Existing shares sold by shareholders are excluded.
  • IPO offer price: the price paid per share in the offering, measured in US$ per share. It can differ from the first exchange-traded price.

This formula does not calculate net proceeds, the company’s valuation, or an investor’s return. Those require different inputs.

Worked example

The following figures are hypothetical round numbers:

  1. A company issues 10 million new shares at an IPO offer price of US$20 per share.
  2. Gross company proceeds are 10,000,000 shares × US$20 per share = US$200 million, before offering expenses.
  3. Existing shareholders separately sell 2 million existing shares at US$20 each. That is US$40 million in gross proceeds to those shareholders, not additional company proceeds.
  4. Suppose the first exchange trade occurs at US$24 per share. The US$4 difference from the offer price is not automatically a gain available to every investor: someone purchasing in exchange trading pays the price at which their own order fills.

Why it matters before you trade

An IPO offer price and a quoted market price answer different questions. A private investor may encounter the stock only after exchange trading starts, when the available price, bid-ask spread, and order-book depth can differ from the offering terms.

Before placing an order in a newly listed stock, a pre-trade check can distinguish the offer price from the current quote and examine whether the intended quantity is large relative to available liquidity. A market order leaves the execution price open; a limit order specifies a maximum purchase price or minimum sale price but may not fill. A trading halt may also interrupt execution.

Fresh listings can have limited trading history. That makes historical volatility, average daily volume, and calculations that depend on them less informative or unavailable. This is a data limitation, not evidence that the stock has low risk.

How PreTrAIde uses it

The product facts do not state that PreTrAIde identifies IPOs, provides IPO allocations, or calculates IPO-specific metrics. PreTrAIde is analysis software, not a broker, and never receives, transmits, or executes orders.

For stocks within its supported US and major European markets, its pre-trade analysis assesses a user-built basket before an order is placed. It returns GO, NO-GO, or MODIFY verdicts, risk assessments, suggested execution strategies, and plain-language reasoning. Its quantitative layer estimates measures including spread, participation in daily volume, market impact, volatility, and data quality. For a newly listed stock, the availability and quality of inputs matter when interpreting such estimates. PreTrAIde’s verdicts support a decision; they are not recommendations.

Common mistakes

  • Treating the offer price as an executable exchange quote. The first available market price may differ.
  • Counting all offering proceeds as company funding. Sales of existing shares benefit the selling shareholders, not the company.
  • Treating a first-day price change as a universal investor return. Returns depend on each investor’s actual purchase price, sale price, and costs.
  • Assuming a short trading record means low volatility. Limited history can make estimates less reliable, not necessarily smaller.

Frequently asked questions

Can retail investors buy shares at the IPO offer price?

Access to shares at the offer price depends on the offering and a broker’s allocation process; it is not guaranteed. Investors who purchase after exchange trading begins pay their actual execution price, which may differ from the offer price.

What is the difference between an IPO offer price and an opening price?

The offer price is the price set for shares sold in the offering. The opening price is the price of the first exchange trade and may be higher or lower.

Does an IPO always raise money for the company?

Not necessarily. Newly issued shares raise gross proceeds for the company, while existing shares sold by current shareholders generate proceeds for those shareholders.

Related terms

Stock Stock is an ownership interest in a company, divided into shares whose market price and value can change. Stock exchange Stock exchange is an organized marketplace that sets rules for listing securities and brings together orders to trade them. Opening auction Opening auction is an exchange process that collects eligible buy and sell orders before regular trading and matches them at a single opening price determined under that exchange’s rules. Liquidity Liquidity is the ability to buy or sell an asset promptly in the desired quantity without substantially moving its price or incurring excessive trading costs. Limit order Limit order is an instruction to trade at a specified price or better: a buy cannot execute above its limit, and a sell cannot execute below its limit. Pre-trade analysis Pre-trade analysis is the assessment of a proposed stock order or basket before placement, estimating execution costs, liquidity and risk to inform the investor’s decision and execution approach.

Markets & instruments

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Educational content, not investment advice. PreTrAIde is analysis software, not a broker: it never executes orders, and its verdicts are decision support, not recommendations to buy or sell.