How the IPO Process Works: From Filing to First Trade

From Private Startup to Public Company

In 2021, 1,035 companies completed initial public offerings on U.S. exchanges, raising a combined $315.6 billion — the most active IPO year since the dot-com era, according to Renaissance Capital. By 2023, that number had plummeted to 154 IPOs raising $26.4 billion, illustrating how sensitive the IPO market is to investor sentiment and interest rates. The process of going public remains one of the most consequential events in a company's lifecycle.

An IPO converts a privately held company into one whose shares trade on a public stock exchange, subject to Securities and Exchange Commission (SEC) disclosure requirements. The process typically takes four to six months and involves investment banks, lawyers, auditors, and regulators.

Pre-IPO Preparation

Long before any SEC filing, the company undergoes internal preparation:

• Auditing financial statements under Generally Accepted Accounting Principles (GAAP) for at least two to three years
• Strengthening corporate governance — appointing independent board members, establishing audit and compensation committees
• Resolving any outstanding litigation, intellectual property disputes, or regulatory issues
• Selecting lead underwriters (investment banks) through a competitive "bake-off" process
• Engaging legal counsel specializing in securities law to draft the registration statement

The choice of lead underwriter is critical. Top-tier banks (Goldman Sachs, Morgan Stanley, JPMorgan) bring institutional investor relationships that help ensure strong demand. The lead underwriter typically receives 3% to 7% of total proceeds as the gross spread — the difference between the price paid to the company and the price at which shares are sold to investors.

The S-1 Registration Statement

The SEC Form S-1 is the foundational disclosure document. It contains:

The SEC reviews the S-1 and issues comment letters requesting clarifications or amendments. Multiple rounds of revision are common. The company cannot promote the offering publicly during this "quiet period."

The Roadshow and Book Building

Once the SEC declares the registration effective, the company and its underwriters embark on a roadshow — a series of presentations to institutional investors (mutual funds, pension funds, hedge funds) across major financial centers. Roadshows typically last one to two weeks.

During the roadshow, underwriters conduct book building. They collect indications of interest — how many shares each investor wants and at what price. This is not a binding order but gauges demand. The underwriter uses this data to set the final offering price.

Pricing Night

The evening before the stock begins trading, the company and underwriters agree on the final price. Strong demand pushes the price toward the top of the filing range (or above it); weak demand forces a price cut. The underwriters then allocate shares, typically favoring long-term institutional holders over short-term traders. Hot IPOs are heavily oversubscribed, meaning demand exceeds available shares by multiples.

First Day of Trading

On listing day, the stock begins trading on the chosen exchange (NYSE or Nasdaq). The opening trade price is determined by a matching engine that pairs buy and sell orders — it often differs significantly from the IPO price. A large "pop" (first-day gain) generates media excitement but actually represents money the company left on the table. Facebook's 2012 IPO priced at $38 and closed its first day at $38.23 — nearly flat. By contrast, Snowflake's 2020 IPO priced at $120 and opened at $245, a 104% pop that meant the company could have raised billions more.

Lock-Up Period and Insider Selling

Company insiders — founders, executives, early investors — are typically subject to a 90- to 180-day lock-up period during which they cannot sell shares. When the lock-up expires, a surge of insider selling can create downward pressure on the stock price. Institutional investors watch lock-up expiration dates closely.

Alternatives to Traditional IPOs

Several alternatives have gained traction:

• Direct listing — the company lists existing shares on an exchange without issuing new ones or using underwriters (Spotify in 2018, Coinbase in 2021). No capital is raised, but insiders can sell immediately.
• Special Purpose Acquisition Company (SPAC) — a blank-check company raises money through its own IPO, then merges with a private target. SPACs surged in 2020–2021 but fell out of favor amid SEC scrutiny and poor post-merger performance.
• Regulation A+ offering — a "mini-IPO" allowing companies to raise up to $75 million with reduced disclosure requirements, aimed at smaller companies.

Costs and Ongoing Obligations

Going public is expensive. Total IPO costs typically range from $1 million to $3 million in legal, accounting, and filing fees, plus the underwriting spread of 3% to 7% of proceeds. A company raising $200 million at a 5% spread pays $10 million to its bankers alone.

After listing, the company faces quarterly SEC reporting (10-Q), annual reporting (10-K), proxy statements, Sarbanes-Oxley compliance costs, and investor relations expenses. These ongoing obligations can cost $1 million to $5 million annually for mid-sized companies. The trade-off is access to public capital markets, increased liquidity for shareholders, and currency (stock) for acquisitions.

The IPO process remains the primary gateway for companies seeking broad public ownership. Whether that gateway serves issuers and investors equally well is a question the financial industry continues to debate.

This article is for informational purposes only and does not constitute financial advice.