A public offering is the sale of a company’s stock or debt securities to general investors, almost always through a national stock exchange and under a registration statement filed with the Securities and Exchange Commission. Companies use public offerings to raise capital for growth, retire debt, or give early investors and employees a way to convert their stakes into cash. The moment shares begin trading, the business becomes subject to federal disclosure rules and continuous market scrutiny it did not face as a private company.
Types of Public Offerings
The most familiar version is the initial public offering. In an IPO, a private company lists its shares on an exchange for the first time, which establishes a public market price and lets outside investors buy ownership stakes directly from the company. The company typically works with an investment bank that underwrites the deal, meaning the bank buys the shares from the company at a negotiated discount and resells them to investors at the public offering price.
Once a company is already public, it can return to the market through a follow-on offering, sometimes called a secondary offering, to sell additional shares. Follow-on offerings raise fresh capital without repeating the full IPO process, though they still require SEC filings and often dilute existing shareholders.
A direct listing skips the underwriting step. The company does not issue new shares or raise new capital through the listing itself. Existing shareholders sell their holdings directly on the exchange, and the market sets the opening price based on buy and sell orders. Spotify and Slack both used this approach, which avoids the underwriter’s fee but also means the company walks away without new funds unless it builds a hybrid structure.
Regulation A+ Offerings
Smaller companies that want public investors but cannot justify the full cost of a traditional IPO can use Regulation A+, sometimes called a “mini-IPO.” Tier 1 allows offerings of up to $20 million in a 12-month period, while Tier 2 raises the cap to $75 million.1U.S. Securities and Exchange Commission. Regulation A Tier 2 issuers must provide audited financial statements and file ongoing reports with the SEC, but they are exempt from state-by-state securities registration. The lighter regulatory burden makes Regulation A+ a realistic path for companies that need public capital but lack the revenue or infrastructure for a full-scale IPO.
How the SEC Registration Works
Before a company can sell securities to the public, it must file a registration statement with the SEC. The most common form is the S-1, the default registration form for any domestic company that does not qualify for a specialized alternative.2U.S. Securities and Exchange Commission. What is a Registration Statement Preparing the S-1 is the most labor-intensive phase of going public, often taking four to six months of work by lawyers, accountants, and the company’s own finance team.
The S-1 must include audited financial statements prepared under Regulation S-X standards. Balance sheets for the two most recent fiscal years are required,3eCFR. 17 CFR 210.3-01 – Consolidated Balance Sheets and income statements and cash flow statements typically cover the three most recent fiscal years. Those financials must be audited by a firm registered with the Public Company Accounting Oversight Board.4PCAOB. Auditing Standards
Beyond the numbers, the company must disclose a detailed description of its business, competitors, and specific risk factors that could affect performance. A separate section lays out how the company plans to spend the money it raises, whether that means funding research, acquiring other businesses, or retiring debt.5eCFR. 17 CFR 229.504 – Item 504 Use of Proceeds All filings go through EDGAR, the SEC’s electronic system, and become publicly available the moment they are uploaded.6U.S. Securities and Exchange Commission. Submit Filings
Once the S-1 is filed, the SEC’s Division of Corporation Finance reviews it and sends comment letters asking for clarifications or additional detail.7U.S. Securities and Exchange Commission. Filing Review Process The company responds, often filing amended versions of the S-1, and the cycle repeats until the staff is satisfied. This back-and-forth commonly takes several weeks and can stretch to months. Meanwhile, the company and its underwriters run a roadshow of presentations to large institutional investors, building a “book” of interested buyers and gauging demand at various price points. Once all comments are resolved, the company asks the SEC to declare the registration effective, which is the legal green light to sell.8U.S. Securities and Exchange Commission. SEC Filing Review Process Trading typically begins the morning after that declaration.
Filing with the SEC is only half the picture. The company must also meet the listing requirements of the exchange it wants to trade on. The NYSE and Nasdaq each impose their own financial thresholds covering earnings history, shareholders’ equity, and public float,9NYSE. Overview of NYSE Initial Listing Standards10Nasdaq. Nasdaq Initial Listing Guide plus governance rules such as majority-independent boards and independent audit committees.
What a Public Offering Costs
The single largest expense is the underwriting discount. Investment banks typically charge between 4% and 7% of gross IPO proceeds, with 7% a longstanding benchmark for mid-sized deals. On a $200 million IPO, that translates to $8 million to $14 million paid to the underwriters.
On top of the underwriting fee, the company pays SEC registration fees calculated at $138.10 per $1 million of securities registered for fiscal year 2026.11U.S. Securities and Exchange Commission. Fiscal Year 2026 Annual Adjustments to Registration Fee Rates FINRA charges a separate filing fee based on the offering amount. Legal and accounting costs vary widely but routinely run into the millions for a traditional IPO. Printing costs for the prospectus, transfer agent fees, exchange listing fees, and state-level notice filing fees add more on top.
These costs do not stop at the IPO. Ongoing compliance, including annual audits by a PCAOB-registered firm, quarterly reporting, and Sarbanes-Oxley internal control assessments, creates a permanent overhead that private companies do not face. Companies weighing a public offering should budget for both the one-time transaction costs and the annual cost of staying public.
Legal Liability for Bad Disclosures
The financial consequences of getting the registration statement wrong are severe. Section 11 of the Securities Act allows anyone who bought securities in the offering to sue if the registration statement contained a materially false statement or omitted a material fact. The issuing company faces near-absolute liability. A buyer does not need to prove the company intended to mislead, or even that the buyer personally read the registration statement.12Office of the Law Revision Counsel. 15 USC 77k – Civil Liabilities on Account of False Registration Statement
The reach extends well beyond the company itself. Every person who signed the registration statement, every director at the time of filing, every accountant or appraiser named in it, and every underwriter involved in the offering can be individually liable. Directors and professionals can escape liability by proving they conducted a reasonable investigation and genuinely believed the statements were accurate, the “due diligence” defense, but the issuing company has no such escape.
Section 12 adds a second layer. Anyone who sells securities through a prospectus or oral communication containing a material misstatement can be forced to buy back the securities at the original purchase price, effectively reversing the sale.13Office of the Law Revision Counsel. 15 USC 77l – Civil Liabilities Arising in Connection With Prospectuses and Communications A successful Section 11 or Section 12 lawsuit can produce damages in the hundreds of millions for a large offering.
What Changes Once Shares Trade
The moment the registration is effective, the company becomes a “reporting company” under Section 13 of the Securities Exchange Act of 1934 and must file periodic disclosures for as long as the securities remain registered.14Office of the Law Revision Counsel. 15 USC 78m – Periodical and Other Reports Three core filings drive the calendar:
- Form 10-K, the annual report, with audited financial statements, management discussion and analysis, and updated risk disclosures. The CEO and CFO must personally certify the financial information.
- Form 10-Q, filed for the first three quarters of each fiscal year (the fourth is folded into the 10-K), with unaudited financial statements and interim operating updates.
- Form 8-K, filed within four business days of a significant event such as a change in top leadership, a major acquisition, entry into a material contract, or a bankruptcy filing.15U.S. Securities and Exchange Commission. Exchange Act Form 8-K
All of these reports go through EDGAR and are public immediately.16U.S. Securities and Exchange Commission. Exchange Act Reporting and Registration Missing a deadline or filing inaccurate data can trigger SEC enforcement, exchange delisting proceedings, or both.
Public companies must also comply with the Sarbanes-Oxley Act. The most expensive piece is Section 404, which requires management to assess the effectiveness of the company’s internal controls over financial reporting every year and include that assessment in the 10-K, with the outside auditor independently reviewing and reporting on it. Building and maintaining the controls needed to pass this annual audit is one of the biggest hidden costs of being public, particularly for companies that ran on informal processes as private entities.
Most IPOs also include a contractual lock-up agreement that prevents insiders and early investors from selling their shares for a set period after the offering, typically 90 to 180 days. Lock-ups are not required by any federal regulation. They are negotiated between the company, its underwriters, and the insiders as a signal to the market that management is not heading for the exits on day one. When a lock-up expires and a large volume of shares becomes available for sale, the stock price often drops.
Scaled Disclosures for Emerging Growth Companies
Not every newly public company faces the full compliance load right away. The JOBS Act created a category called “emerging growth company” that gives qualifying businesses a lighter set of disclosure obligations during their first years as a public company. A company qualifies if it had less than $1.235 billion in annual gross revenue during its most recent fiscal year.17U.S. Securities and Exchange Commission. Emerging Growth Companies A company keeps EGC status for up to five years after its IPO, or until it crosses the revenue threshold, issues more than $1 billion in non-convertible debt over a three-year period, or becomes a “large accelerated filer.”
The practical benefits matter. EGCs can include only two years of audited financial statements in their registration statement instead of three. They are exempt from the auditor attestation requirement under Sarbanes-Oxley Section 404(b), which alone can save hundreds of thousands of dollars annually. They can adopt new accounting standards on the same delayed timeline as private companies, and they face reduced executive compensation disclosure requirements. For many mid-sized businesses, EGC status is what makes the economics of going public workable in the first place.