What Is an IPO? How It Works for Everyday Investors

By Stash Editorial Team · Last updated June 10, 2026

Reviewed internally by Stash compliance. Not an endorsement by the SEC or FINRA.

An IPO, or initial public offering, is when a private company sells shares to the public for the first time and starts trading on a stock exchange. It can turn a company you’ve only seen in headlines, apps, or ads into a stock anyone with an eligible brokerage account may be able to buy.

That does not make it a must-buy. IPOs are often surrounded by hype, limited information, and fast price swings. Your job is not to win the first-day headline. It is to understand what is being offered, what risks come with it, and whether it belongs in a diversified long-term portfolio.

If you’re trying to place IPO headlines in context, start with The Stash Way: Invest Regularly. IPOs can be exciting, but excitement is not the same thing as a plan.

What an IPO is

An IPO is the process a private company uses to become a publicly traded company. Before an IPO, ownership is usually limited to founders, employees, venture capital firms, private equity firms, and early backers. After an IPO, shares can trade on a public exchange like the New York Stock Exchange or Nasdaq.

Companies go public for a few common reasons:

• Raise capital: The company may sell new shares to fund growth, pay down debt, invest in research, or expand operations.

• Create liquidity: Early investors and employees may eventually be able to sell some shares, usually after restrictions expire.

• Set a public market value: A traded stock price can make it easier to value employee equity and future acquisitions.

• Raise the company’s profile: Public companies often get more attention from customers, partners, analysts, and the media.

The company does not simply decide to “go public” one morning. It usually hires investment banks, files detailed documents with the Securities and Exchange Commission, goes through SEC review, meets with large investors, and sets an offering price before public trading begins.

A useful way to think about it: an IPO is the bridge between private ownership and public ownership. But the bridge has tolls, rules, and traffic. Not every investor gets the same access at the same price.

This is general guidance; what’s right for you depends on your specific situation. Stash is a regulated investment adviser, not a bank, and investing involves risk, including the risk that you could lose money.

How an IPO works

Most traditional IPOs follow a similar path. The details can vary, but the main steps are usually the same.

1. The company prepares to go public

A company starts by getting its financial reporting, legal structure, leadership, and internal controls ready for public-company life. Public companies face ongoing reporting requirements, including quarterly and annual filings.

This is a big shift. Private companies can keep much more information private. Public companies have to tell investors a lot more about revenue, losses, risks, debt, executive pay, major shareholders, and how the business works.

2. The company files an S-1 with the SEC

The key IPO document is usually called an S-1 registration statement. It includes information such as:

• What the company does

• Revenue, profit or losses, and cash flow

• Major business risks

• How the company plans to use the money raised

• Who owns the company before the IPO

• Executive compensation

• Related-party transactions

• Share structure, including whether insiders have special voting rights

Many companies, especially emerging growth companies, may begin parts of the IPO review process confidentially before making documents public. But before shares are sold to the public, investors receive a public prospectus.

3. Investment banks help gauge demand

In a traditional IPO, investment banks act as underwriters. They help the company estimate demand, market the offering to institutional investors, and set an expected price range.

This is where big investors often get the first look. Mutual funds, pension funds, hedge funds, and other institutions may place indications of interest before the IPO price is finalized.

4. The IPO price is set

The company and its underwriters set an IPO price, usually the night before trading begins. That price determines how much money the company raises if it is selling new shares.

The IPO price is not the same thing as the stock’s first trade on the exchange. The public market can push the price higher or lower as soon as trading starts.

5. Shares begin trading

Once shares open for trading, buyers and sellers in the public market set the price in real time. The first-day price can jump, fall, or swing sharply.

After that, the company becomes part of the public market. It must report results, answer to shareholders, and deal with the same market forces as other public companies.

A simple IPO example

Say a private company called Acme Robotics wants to go public.

It plans to sell 30 million new shares at $20 per share.

That means the company could raise about $600 million before underwriting fees and other costs.

But that does not mean the whole company is worth $600 million. If Acme has 200 million total shares outstanding after the IPO, the implied market value at the IPO price would be:

200 million shares × $20 = $4 billion market capitalization

Now imagine you place a $500 order and receive shares at the IPO price of $20. You would own 25 shares.

• If the stock opens at $28, your position shows an unrealized gain.

• If the stock opens at $16, your position shows an unrealized loss.

Neither move proves the company is a great or terrible long-term investment. A first-day pop can mean demand was high, the IPO was priced conservatively, or investors are caught up in the moment. A first-day drop can mean the market disagreed with the valuation, broader market conditions were weak, or early demand was overestimated.

The first trading day is a data point. It is not a full investment thesis.

IPO price vs. opening price

This is one of the most confusing parts of IPO investing.

The IPO price is the price set before public trading begins. It is the price paid by investors who receive an IPO allocation.

The opening price is the first price at which the stock trades on the public exchange. Many everyday investors buy at or after this point.

Those prices can be very different. If a stock is priced at $20 in the IPO but opens at $30, investors buying after the open are not buying “the IPO at $20.” They are buying a newly public stock at the current market price.

That distinction matters. A company can be exciting at one price and much less attractive at another. Price is part of risk.

Can everyday investors buy IPO shares?

Sometimes, but IPO access is often limited.

In many traditional IPOs, a large share of the offering goes to institutional investors before the stock starts trading publicly. Some brokerages offer IPO access to certain clients, but availability depends on the deal, the brokerage, eligibility rules, demand, and allocation limits.

Stash does not offer access to IPO allocations. Everyday investors may still be able to buy shares after they begin trading publicly, if the security is available through their brokerage.

This is where Wall Street can feel tilted. Institutions often get first access, while smaller investors meet the stock after the crowd has already reacted. That does not mean you are locked out of good investing. It means you do not need to treat early access as the only path. Long-term investing is not built on being first in line for every new listing.

Why IPOs matter for everyday investors

IPOs matter because they bring new companies into the public markets. Some become large, lasting businesses. Others struggle, trade below their IPO price, or disappear through acquisitions, bankruptcies, or delistings.

Even if you never buy an IPO directly, IPOs can affect your investing life in a few ways.

They can enter funds you already own

If you invest in broad stock market funds, a newly public company may eventually be added to an index or fund. That usually depends on rules around market capitalization, liquidity, public float, profitability, or index committee decisions.

So you might get exposure to a newer public company through a diversified fund rather than by buying the individual stock on day one.

They shape market sentiment

A major IPO can influence how investors think about an industry. For example, a high-profile technology, healthcare, consumer, or artificial intelligence-related IPO can affect expectations for similar companies.

That does not mean the whole sector is suddenly attractive or unattractive. It means investors are constantly repricing stories based on growth, profits, interest rates, and risk appetite.

They show how market cycles work

IPO activity tends to move in cycles. When markets are strong and investors are willing to take more risk, more companies often try to go public. In tougher markets, companies may delay IPO plans or accept lower valuations.

A splashy IPO during a bull market may be received very differently than one during a What Is a Roth IRA?. When investors feel confident, they may pay more for growth. When they feel cautious, they may focus harder on profits, cash flow, debt, and valuation.

What to look at before buying a newly public stock

You do not need to become an investment banker to understand an IPO. But you should know what you are looking at. The S-1 can be long, so start with the parts that answer practical questions.

Business model

How does the company make money? Who pays it? Is revenue recurring, seasonal, transaction-based, or dependent on a few big customers?

If you cannot explain how the company earns revenue in plain English, pause. Complexity is not automatically bad, but confusion is a poor reason to invest.

Revenue growth and profitability

Many IPO companies are growing quickly but losing money. That is not unusual, especially for younger companies. The question is whether losses are narrowing, whether margins are improving, and whether the company has a realistic path to profitability.

Revenue growth gets headlines. Cash flow keeps businesses alive.

Use of proceeds

The prospectus explains how the company plans to use the IPO money. Funding expansion can tell one story. Paying down debt tells another. Cashing out existing holders can tell another.

None is automatically good or bad. Context matters.

Valuation

A company can be strong and still be expensive. Look at market capitalization, price-to-sales ratio, earnings if the company is profitable, and comparisons to similar public companies.

Valuation is not a crystal ball. It is a way to ask: how much optimism is already built into the price?

Share structure and voting power

Some IPOs have multiple share classes. That can give founders or insiders much more voting power than public shareholders.

You may still choose to invest in companies with dual-class structures, but you should know what you own. A share of stock may give you economic exposure without much voting influence.

Lock-up expirations

Many IPOs include a lock-up period, often around 180 days, during which insiders and early investors are restricted from selling certain shares. When that lock-up expires, more shares may become available for sale.

That does not mean the stock will automatically fall. But it can add volatility because supply in the market may increase.

Common IPO risks

IPO investing is not automatically bad. But it is often riskier than buying shares of a company with years of public reporting history.

Key risks include:

• Limited public track record: The company may have only recently begun reporting as a public company.

• Volatility: Newly public stocks can move sharply, especially around earnings reports or lock-up expirations.

• Valuation risk: Hype can push prices above what business results can support.

• Information gaps: Institutions may have more access to management before the IPO than everyday investors do.

• Concentration risk: Buying one hot IPO can leave your portfolio too dependent on one company or sector.

• Dilution risk: The company may issue more shares later, which can reduce existing shareholders’ ownership percentage.

• Market-cycle risk: IPOs launched during enthusiastic markets may face pressure if investor appetite cools.

Stash’s point of view is simple: do not let IPO hype bully you into abandoning your plan. Invest for the long term, diversify, and invest consistently. A single new stock should not carry the weight of your whole financial future.

IPOs vs. direct listings vs. SPACs

Not every company enters the public market through a traditional IPO.

Traditional IPO

In a traditional IPO, a company usually works with underwriters, sells shares at a set IPO price, and begins trading on an exchange. The company may raise new money, and some existing shareholders may sell shares.

Direct listing

In a direct listing, existing shareholders sell shares directly into the public market. Historically, many direct listings did not raise new capital for the company in the same way as a traditional IPO, though exchange rules have evolved to allow some direct listings with capital raising.

Direct listings can reduce some underwriting costs, but they can also come with less price support and different trading dynamics.

SPAC merger

A SPAC, or special purpose acquisition company, is a public shell company that raises money and then seeks to merge with a private company. When the merger is completed, the private company becomes publicly traded.

SPACs became especially popular during the 2020 and 2021 market boom, then faced more scrutiny after many performed poorly. In 2024, the SEC adopted rules requiring more disclosure for SPAC IPOs and de-SPAC transactions, including information about conflicts of interest, dilution, and projections.

The lesson for everyday investors is the same across structures: understand the business, the price, the risks, and how it fits into your portfolio.

Common misconceptions about IPOs

The biggest IPO misconceptions come from mixing up access, popularity, and performance.

Misconception: IPOs are automatic bargains

They are not. IPO pricing is negotiated by professionals, and demand can change quickly once trading begins. If a stock opens far above the IPO price, later buyers may be paying a much richer valuation than the headline suggests.

Misconception: A famous brand makes a safer IPO

A brand you know is not the same as a stock you understand. The company may have loyal users, strong revenue, and a great product, but the stock still depends on valuation, profitability, competition, and expectations.

Misconception: Missing the IPO means missing the opportunity

You do not have to buy on day one. Public companies report results every quarter. Over time, investors get more information about growth, margins, leadership, and strategy.

Patience is underrated. If a company becomes a strong long-term business, there may be many chances to evaluate it after the opening bell.

Misconception: A first-day pop means the stock is a winner

A first-day jump may feel validating, but it can fade. Short-term demand does not guarantee long-term performance.

Misconception: IPOs are only for wealthy investors

IPO allocations often favor institutions, but public-market investing is broader than IPO access. Everyday investors can build diversified portfolios with fractional shares, ETFs, and long-term strategies. You do not need VIP access to start investing.

Bottom line

An IPO is a company’s first sale of shares to the public. It can be an important business milestone, but it is not a shortcut around research, risk, or valuation.

Treat IPO headlines as information, not instructions. Separate the company from the stock. Then ask the question that matters most: does this help you build a diversified portfolio for the long term?

Important disclosures

• Investing involves risk, including the possible loss of principal. Past performance is not a guarantee of future results.

• Any hypothetical example is for illustration only. It is not a prediction or guarantee of performance, does not reflect actual results, and does not account for fees, taxes, or other costs.

• This article is for educational purposes only and is not a recommendation to buy, sell, or hold any security.

• IPOs and SPACs can be highly volatile and involve significant risk. Availability through any particular brokerage is not guaranteed, and Stash does not offer access to IPO allocations.

• This material is for educational purposes only and reflects general information, not individualized financial, legal, or tax guidance. Stash is a registered investment adviser; what is right for you depends on your specific situation.