What an IPO is
An initial public offering (IPO) is the moment a private company sells shares to the public for the first time and lists them on a stock exchange, such as the NYSE or Nasdaq in the U.S., or the NSE and BSE in India. Before the IPO, the company is owned by its founders, employees and private investors. After it, anyone with a brokerage account can buy a piece.
"Going public" and "listing" are other names for the same thing.
Why companies go public
- To raise money for growth, research, new markets or paying off debt.
- To let early backers cash out. Founders, employees with stock options and venture capital funds can eventually sell shares on the open market.
- To get a public "currency". Listed shares can be used to buy other companies and to pay staff.
- For credibility. Public companies publish audited results, which can reassure customers, lenders and partners.
There are downsides too: IPOs are expensive, public companies must report results every quarter, and their share price is open to daily scrutiny. Some companies stay private for a long time for exactly these reasons.
How the IPO process works, step by step
- Hire underwriters. The company picks investment banks to manage the deal. They advise on timing and price, and often guarantee to buy the shares and resell them.
- File with the regulator. In the U.S. the company files a registration statement (Form S-1) with the SEC; in India it files a Draft Red Herring Prospectus (DRHP) with SEBI. These documents disclose the business, finances, risks and how the money will be used. They are public and worth reading.
- The roadshow. Executives and bankers pitch the company to big investors such as mutual funds and pension funds, and gauge demand.
- Set the price range. Based on demand and comparable companies, the bankers set a range (in India, a "price band").
- Book-building and pricing. Investors put in orders. If demand is strong the final price can be at or above the top of the range; if weak, it can be cut or the IPO postponed.
- Allocation. Shares are handed out. In the U.S., most go to institutions; in India a fixed portion is reserved for retail investors, with a lottery if the issue is oversubscribed.
- Listing day. The stock starts trading and its price is set by the market from that point on.
How the IPO price is set
There is no formula. Bankers compare the company with similar listed businesses (for example, price-to-sales or price-to-earnings multiples), look at its growth and profits, and above all test demand during the roadshow.
Banks and companies often aim to price a little below what they think the market will pay. A modest first-day rise keeps IPO investors happy and makes the next deal easier to sell. Priced too low, though, the company leaves money on the table: it could have raised more for the same shares.
The listing-day "pop" (and flop)
The difference between the IPO price and where the stock opens or closes on day one is called the pop. Popular deals can jump sharply; others open below their IPO price, called "breaking issue".
A big pop is not proof of a great company, and it mainly benefits investors who received shares at the IPO price. Investors who buy in the first hours of trading often pay a much higher price than the IPO price, and many IPO stocks drift lower in the months that follow.
Key IPO terms
- Prospectus: the official disclosure document. Read the "Risk Factors" and "Use of Proceeds" sections first.
- Oversubscribed: investors asked for more shares than were on offer. "Subscribed 10 times" means demand was ten times supply.
- Lock-up period: insiders agree not to sell for a set time after the IPO, commonly 90 to 180 days. When it ends, extra supply can weigh on the price.
- Quiet period: a stretch around the IPO when the company and its banks are limited in what they can say publicly.
- Primary vs. secondary shares: primary shares are new, and the money goes to the company. Secondary shares are sold by existing holders, and the money goes to them, not the business. The prospectus tells you the split.
- Greenshoe: an option letting underwriters sell up to 15% more shares if demand is strong, which helps steady the price after listing.
Other ways to go public
| Route | How it works | Main difference |
|---|---|---|
| Traditional IPO | Banks underwrite, price and sell new shares | Raises money, most common |
| Direct listing | Existing shares simply start trading, no underwriters selling new shares | Cheaper; usually raises no new money |
| SPAC merger | A listed shell company (a "blank-check" company) merges with a private one | Faster, but has a mixed track record for investors |
Can ordinary investors buy IPO shares?
It depends on where you live and which broker you use.
- In the U.S., most IPO shares go to large institutions. Some brokers offer limited IPO access to retail customers, often with eligibility rules. Most people simply buy once the stock starts trading.
- In India, retail investors can apply directly through their broker or bank using UPI or ASBA during the subscription window. If the issue is oversubscribed, shares are allotted by lottery.
Risks to understand before buying an IPO
- Short history: there are only a few years of public financial data to judge.
- Hype: media attention can push the price well above what the business supports.
- Unprofitable companies: many IPOs come from fast-growing firms that still lose money.
- Lock-up expiry: insiders selling after 3 to 6 months can push the price down.
- Control: some companies list with dual-class shares that leave founders in control, whatever public shareholders want.
The prospectus, the company's first earnings reports and an honest look at its valuation matter more than listing-day excitement.
