IPO stocks are shares of a private company that become available to the public for the first time through an initial public offering. When a company “goes public,” it sells newly issued shares to raise capital, and those shares then trade on a stock exchange like the NYSE or Nasdaq. For investors, IPOs represent a chance to buy into a company at the start of its public life, though the process of actually getting shares and understanding the risks works differently than buying a stock that’s already trading.
How a Company Goes Public
A private company deciding to go public typically hires investment banks to serve as underwriters. These banks help the company determine how many shares to sell and at what price, then handle the mechanics of getting those shares into investors’ hands. The company also brings on accounting and law firms to prepare the extensive paperwork the SEC requires.
The formal process starts with filing an S-1 registration statement with the Securities and Exchange Commission. This document lays out the company’s financials, business model, risks, and how it plans to use the money it raises. Companies generally need at least two years of audited financial statements before they can file. Once the SEC reviews and approves the filing, the company and its underwriters go on a “roadshow,” pitching the investment to large institutional investors like mutual funds and pension funds to gauge interest and settle on a final share price.
On the day of the IPO, shares begin trading on a public exchange. The price investors pay that first morning may be higher or lower than the official offering price, depending on demand. The entire process from initial filing to first trade typically takes several months.
Who Gets to Buy at the Offering Price
Most individual investors don’t get access to IPO shares at the offering price. The underwriting banks allocate the majority of shares to institutional investors during the roadshow. Whatever remains for retail investors goes through brokerage firms, and those firms are selective about who gets an allocation.
Your brokerage must first determine that the IPO is suitable for you based on your income, net worth, investment objectives, risk tolerance, and existing holdings. Beyond that suitability check, many firms limit IPO access to customers who maintain certain account balances, trade actively, or pay for premium service tiers. Even if you qualify, there’s no guarantee you’ll receive the number of shares you request.
Some brokerages also impose anti-flipping policies. If you receive IPO shares and sell them quickly to capture a first-day price jump, the firm may ban you from participating in future IPOs for several months. The intent is to discourage short-term speculation and reward investors who plan to hold.
What Happens After the IPO
Once shares start trading publicly, anyone with a brokerage account can buy and sell them on the open market just like any other stock. But there’s one dynamic unique to newly public companies that affects the stock price in the weeks and months after the IPO: the lock-up period.
Company insiders, founders, employees with stock options, and early investors like venture capital firms typically agree not to sell their shares for 90 to 180 days after the IPO. This restriction isn’t a government regulation. It’s a contractual agreement arranged by the underwriters to prevent a flood of selling that could tank the stock price right out of the gate. When the lock-up expires, insiders can start selling, and the increased supply of shares sometimes pushes the price down. Investors who buy IPO stocks on the open market should pay attention to when the lock-up period ends, since it can trigger noticeable price swings.
The First-Day “Pop” and Long-Term Reality
IPO stocks are known for their first-day price jumps. When demand exceeds supply, the stock opens well above the offering price, creating instant gains for anyone who received shares at the IPO price. This gap between the offering price and the first-day closing price is called underpricing, and research from the University of Florida’s IPO database shows it has been a consistent pattern across decades and dozens of countries.
That first-day pop, however, mostly benefits institutional investors and the select retail investors who got in at the offering price. If you buy shares on the open market after trading begins, you’re paying the already-elevated price. Long-term performance of IPO stocks is a different story. Many newly public companies underperform the broader market over the three to five years following their debut. Some become household names and reward early investors handsomely, but others struggle to meet the growth expectations baked into their initial valuations. The excitement surrounding an IPO can inflate prices beyond what the company’s fundamentals support.
Direct Listings and SPACs
Not every company that goes public uses a traditional IPO. Two alternatives have gained traction in recent years.
In a direct listing, a company becomes publicly traded without issuing new shares or raising new capital. Instead, existing shareholders (employees, founders, early investors) sell their shares directly to the public on an exchange. Because there are no underwriters setting a price and allocating shares, there’s no offering price and no first-day pop in the traditional sense. The stock opens at whatever price the market sets based on buy and sell orders. Companies that already have enough cash and mainly want to give existing shareholders a way to sell have used this route.
A SPAC, or special purpose acquisition company, takes the reverse approach. A blank-check company goes public first, raising money with no specific business in mind, then merges with a private company to take it public. SPACs often carry longer lock-up periods of six to 12 months or more. Recent rule changes have aligned the listing requirements for these transactions more closely with traditional IPOs, reflecting how regulators view them as functionally equivalent.
What to Consider Before Buying
IPO stocks carry risks that don’t apply to established public companies. There’s limited trading history, so you can’t study years of price patterns or quarterly earnings trends. The S-1 filing provides financial data, but you’re working with far less information than you’d have for a company that’s been public for a decade. Analyst coverage is often thin in the early months, and the company must build a track record of producing reliable quarterly and annual financial statements as a public entity.
Volatility tends to be higher with newly public stocks. Prices can swing dramatically in the first few weeks as the market figures out what the company is really worth without the structure of underwriter price support. If you’re interested in IPO stocks, reading the S-1 filing is the single most useful step you can take. It contains the company’s revenue, profit or loss figures, debt levels, competitive risks, and exactly how the raised capital will be spent. That document is publicly available on the SEC’s EDGAR database as soon as it’s filed.