How IPO Works?

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IPO Process Library · 01 Fundamentals

Last Updated | November 11, 2026

How an IPO Works

An IPO moves a company from private to public in a sequence of preparation, registration, marketing, pricing, and listing. This page gives the end-to-end view; the rest of the Library goes deeper on each step.

Key Takeaways

• The sequence runs: prepare, hire banks, draft the S-1, SEC review, roadshow, pricing, first trade, public reporting.
• Different parties lead each stage: management and auditors early, SEC and counsel in the middle, underwriters and investors late.
• Pricing happens near the end, after the roadshow reveals demand.
• The IPO is the start of public-company life, not the finish line.

StepsWho does whatMoney flowRiskFAQRelated

The IPO sequence at a glance

01

Decide and prepareManagement and the board evaluate going public, then fix financial reporting, controls, governance, and the cap table. See the IPO Readiness Checklist.

02

Hire the teamThe company selects lead underwriters, securities counsel, and auditors, and signs engagement terms.

03

Draft the S-1Working groups draft the registration statement, run diligence, and prepare financials and risk disclosure.

04

SEC reviewThe draft is submitted confidentially or filed publicly. The SEC issues comments, the company responds, and amendments follow.

05

Launch and roadshowA public S-1 with a price range goes out. Management presents to investors while bankers build the book.

06

PricingAfter the market closes, the company and lead banks set the final price and share count, and sign the underwriting agreement.

07

First trade and closingShares begin trading the next morning. Closing follows within days, and the greenshoe period begins.

08

Public company lifeReporting, quarterly earnings, lock-up expirations, analyst coverage, and potential follow-ons.

Who leads each stage

Stage	Lead parties
Preparation	Management, board, CFO, auditors, company counsel
Drafting and diligence	Company counsel, underwriters' counsel, bankers, auditors
SEC review	SEC staff, company counsel, auditors
Marketing	Management, lead bookrunners, institutional investors
Pricing and allocation	Company, lead bookrunners
Trading and after	Exchange, underwriters, market makers, investors, IR team

Where the money goes

Investors pay the offer price. The company receives that amount less the underwriting discount and offering expenses on primary shares. Selling shareholders receive proceeds, net of discounts, on secondary shares. The over-allotment option can add proceeds if exercised.

What can go wrong

• Market conditions deteriorate and the deal is postponed or priced below the range.
• SEC comments or an audit issue delay the timeline.
• Investor feedback pushes valuation down or exposes disclosure concerns.
• The stock trades below the offer price after listing.

Common questions

How long does the whole process take?

It varies. See IPO Timeline Explained for typical ranges by stage.

Can a company cancel an IPO after filing?

Yes. Companies can postpone or withdraw before pricing, and many do when markets turn.

Keep Reading

IPO Timeline ExplainedHow long each stage takes from prep to trading.Key IPO ParticipantsCompany, underwriters, SEC, lawyers, auditors, investors.What Is an S-1?The registration statement that becomes the prospectus.What Is a Roadshow?Pitches to institutional buy-side investors.IPO AllocationHow banks decide who gets IPO shares.What Happens After IPO?10-K, 10-Q, earnings, IR.

Methodology & Sources
Synthesizes SEC rules and guidance (Securities Act of 1933, Exchange Act of 1934, Regulation S-K), NYSE/Nasdaq listing standards, FINRA rules, and public S-1 filings. Cross-checked against primary documents. Rules, thresholds, and timelines change; confirm current requirements with counsel before acting. General education, not legal or investment advice.

Author: Erwin Castro