How an IPO Actually Works
The bell rings in about thirty seconds. The process that got you there takes eighteen months.
An IPO is one of the most recognizable events in business. The abbreviation alone carries weight. What most people picture is the ending — confetti, a CEO at a podium, a ticker symbol lighting up for the first time. What actually produces that moment is a long, expensive, bureaucratic process that most people have never seen and that most companies only go through once.
By Aaron Rose · Tech Reader Magazine · August 22, 2026
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IPO Defined
The full name is Initial Public Offering. What that means, stripped down: a private company sells shares of itself to the general public for the first time. Before an IPO, ownership of the company belongs to a limited group — founders, employees with equity, and private investors like venture capital firms. After an IPO, anyone with a brokerage account can buy in. The company gets capital. The early investors get liquidity. The public gets access.
That exchange sounds simple. The machinery behind it is not.
Step One: Decide You're Ready
The IPO process officially begins when a company's board and executive team decide to pursue it. In practice, that decision comes after a long internal conversation about whether the company can withstand the scrutiny that public markets require. Public companies have disclosure obligations that private companies do not. Every quarter, they file financial statements with the Securities and Exchange Commission. Investors, analysts, journalists, and competitors will read those filings. Everything that was previously internal becomes a matter of public record.
Companies that go public typically have two or three years of clean, audited financial history before they file. Not because the law requires it, but because the SEC and investors expect it — and because a company that can't produce reliable historical financials will have a hard time convincing anyone to buy its shares.
Step Two: Hire the Underwriters
Once the decision is made, the company selects investment banks to manage the offering. These banks are called underwriters. They perform a function that is central to how IPOs work: they buy the shares from the company and then sell them to investors. The risk of the offering — what happens if investor demand falls short — sits primarily with the underwriters.
3–7%Typical underwriter fee, calculated as a percentage of total IPO proceeds — on a $1B offering, that's $30–70 million off the top.
Large IPOs are typically managed by a lead underwriter — usually one of the major investment banks — with a syndicate of additional banks brought in to distribute shares more broadly. The lead bank runs the process, sets the price, and takes the largest share of the fees. The syndicate helps place shares with institutional investors across different markets and geographies.
Selecting underwriters is competitive. Banks pitch for the business. The company chooses based on reputation, the quality of the bank's analyst coverage in the relevant sector, and its relationships with the institutional investors the company most wants to attract as long-term shareholders.
Step Three: File the S-1
This is the document that makes an IPO real. The S-1 is the registration statement that a company files with the SEC. It is the most comprehensive disclosure a company will ever make. A typical S-1 runs several hundred pages and covers the company's business model, revenue history, growth trajectory, risk factors, competitive landscape, use of proceeds, executive compensation, and the ownership stakes held by insiders.
The S-1 is the document that makes an IPO real.For the first time, the public learns what the company actually looks like from the inside.
The risk factors section is where the company is legally required to tell investors everything that could go wrong. Competitors. Regulation. Key-person dependency. Macroeconomic exposure. Customer concentration. Litigation. Companies are incentivized to be thorough here because failing to disclose a material risk — one that later materializes — creates legal liability. The result is that S-1 risk factor sections often read like a catalog of every bad thing that could conceivably happen to a business.
After filing, the SEC reviews the S-1 and issues comment letters — formal questions and requests for clarification. The company responds. Multiple rounds of comments and responses are normal. This back-and-forth can take weeks or months. The SEC is not approving the offering. It is ensuring that the disclosure is complete. Whether the company is a good investment is a judgment the SEC leaves entirely to the market.
Step Four: The Road Show
While the SEC review is underway, the company begins the road show. This is the sales operation. Executives — typically the CEO and CFO — travel to major financial centers and present the company's story to institutional investors. Mutual funds. Pension funds. Hedge funds. Asset managers. These are the buyers who will anchor the offering.
A road show runs for roughly two weeks. The presentation is tightly controlled. SEC rules restrict what the company can say publicly during this period — anything beyond what is in the S-1 can create legal exposure. The goal is not to make the sale in the room. The goal is to generate enough interest that investors submit indications of interest, which the underwriters use to build a picture of demand.
Step Five: Price the Deal
The night before the IPO, the underwriters and company executives meet to set the final offering price. The price range has been communicated to investors throughout the road show — typically a spread of a few dollars per share. The final price is set based on the demand the road show generated.
If demand significantly exceeds the number of shares available, the price is set at the top of the range or above it. If demand is soft, the price comes in at or below the bottom of the range. In rare cases, a deal is pulled entirely if demand is insufficient to support any price the company finds acceptable. Pricing an IPO is the moment where the long process of preparation meets the market's actual judgment.
Step Six: The Opening Bell
On the morning of the IPO, shares begin trading on the public market under the company's new ticker symbol. The opening price — what the stock actually trades at when the market opens — is often different from the offering price. If the stock opens significantly higher than the offering price, it is described as "popping." This is celebrated in headlines. It is also, from the company's perspective, a sign that the offering was underpriced — money that could have gone to the company went instead to the institutional investors who bought in at the offering price and sold into the pop.
The bell-ringing ceremony is real, and it is brief. A group of executives stands at the exchange's podium, rings the bell, and waves at the cameras. The stock is already trading. The ceremony is acknowledgment, not initiation.
If the stock pops on opening day, the headlines celebrate it.The company's finance team quietly notes that the offering was underpriced.
After the Bell
The IPO is not the end of the process. There is a lockup period — typically 90 to 180 days — during which insiders, early investors, and employees with equity cannot sell their shares. This prevents a flood of supply from hitting the market immediately after the offering and suppressing the price. When the lockup expires, those holders are free to sell, and the market absorbs whatever they choose to liquidate.
From that point forward, the company operates under a new set of obligations. Quarterly earnings reports. Annual filings. Disclosure of material events. Analyst coverage. Activist investors. The machinery of public markets, which the company now inhabits permanently.
The process from decision to first trading day typically takes twelve to eighteen months. It involves lawyers, bankers, auditors, SEC examiners, investor relations professionals, and, at the center of it all, a company that has to keep operating normally while simultaneously producing the most detailed self-portrait it has ever assembled.
The bell rings for thirty seconds. The work behind it takes considerably longer.
The Numbers Behind the Numbers
How companies set their IPO valuation, what "fully diluted shares" actually means, and why the offering price and the opening price are almost never the same thing. Coming soon at Tech Reader Magazine.