An equity offering is a sale of company stock to investors in exchange for capital. Instead of borrowing money and repaying it with interest, the company sells ownership stakes, and investors receive a share of future profits along with voting rights. The proceeds typically fund expansion, research, debt repayment, or acquisitions. How any particular offering unfolds depends on whether the company is going public for the first time, is already listed on an exchange, or wants to avoid the public markets entirely.
The Main Types of Equity Offerings
Initial Public Offerings
An initial public offering, or IPO, is the first time a private company sells stock to the general public. The company moves from private ownership to trading on an exchange such as the New York Stock Exchange or Nasdaq. To get there, it files a registration statement with the Securities and Exchange Commission, most commonly on Form S-1, which lays out finances, business model, risk factors, and planned use of proceeds.1U.S. Securities and Exchange Commission. What Is a Registration Statement The SEC reviews the document and often sends multiple rounds of questions before the offering can proceed.
Follow-on Offerings
A company already trading on an exchange can sell additional stock through a follow-on offering, sometimes called a secondary public offering. There are two versions. In a primary follow-on, the company creates and sells new shares, raising fresh capital and increasing the total share count. In a secondary follow-on, large existing shareholders such as founders or venture capital firms sell their own shares; the company sees no new money, and ownership simply changes hands.
Companies that have been filing with the SEC for at least twelve months and meet certain size and compliance requirements can use the streamlined Form S-3 registration statement instead of Form S-1.2U.S. Securities and Exchange Commission. Eligibility of Smaller Companies to Use Form S-3 or F-3 for Primary Securities Offerings Form S-3 pulls in the company’s existing public filings by reference, so the document itself is shorter.
At-the-Market Offerings
An at-the-market offering lets a public company sell new shares gradually into the open market at prevailing prices rather than all at once at a fixed price. A broker-dealer handles sales over days, weeks, or months, and the company controls the timing and volume. It avoids the steep discount that often accompanies a large follow-on, but it works best for companies whose stock trades with enough daily volume to absorb the new shares without a noticeable price drop. Companies set up these programs through a shelf registration on Form S-3 so they can raise capital when market conditions are favorable.
Private Placements
Private placements skip the full SEC registration process by selling shares directly to a small group of investors. These offerings rely on exemptions under Regulation D, most often Rule 506(b) or Rule 506(c).3U.S. Securities and Exchange Commission. Regulation D Offerings The distinction matters. Rule 506(b) bars the company from advertising the offering to the general public. Rule 506(c) permits open advertising but requires the company to take concrete steps to verify each investor’s accredited status.4U.S. Securities and Exchange Commission. Assessing Accredited Investors Under Regulation D Under 506(b), a reasonable belief that the investor qualifies is enough; under 506(c), the company may need to review tax returns and bank statements, or get written confirmation from a broker, attorney, or CPA.
Most buyers in a private placement must be accredited investors. For individuals, that means a net worth above $1 million (excluding the primary residence) or annual income over $200,000 ($300,000 with a spouse or partner) in each of the prior two years, with a reasonable expectation of the same in the current year.5U.S. Securities and Exchange Commission. Accredited Investors The tradeoff for avoiding registration is that the shares are restricted. Investors generally cannot resell them on the open market for at least six months if the company files reports with the SEC, or one year if it does not.6U.S. Securities and Exchange Commission. Rule 144 – Selling Restricted and Control Securities
Rights Offerings
A rights offering gives existing shareholders the first opportunity to buy newly issued shares, usually at a discount to the market price. The company distributes transferable rights to each shareholder in proportion to current holdings, and those rights act as short-lived options. If you own 2% of the company before the offering, you receive enough rights to buy 2% of the new shares, preserving your ownership percentage. Shareholders who don’t want to participate can sell their rights to other investors before expiration.
How a Public Offering Actually Happens
Preparation and Underwriter Selection
The process starts well before any paperwork reaches the SEC. The company selects one or more investment banks to act as underwriters, forming an underwriting syndicate. The underwriters run deep financial and legal due diligence, help structure the deal, and advise on offering size and likely price range. This phase can take several months, pulling in the company’s legal counsel, auditors, and management team.
Filing and SEC Review
Lawyers for the underwriters and the company prepare the registration statement, typically Form S-1 for an IPO. Federal securities law makes it illegal to sell or even offer to sell securities without an effective registration statement on file, so this document gets intense attention.7Office of the Law Revision Counsel. 15 USC 77e – Prohibitions Relating to Interstate Commerce and the Mails SEC staff review it and usually send back several rounds of comments asking for clarification or more disclosure. The exchange continues until the SEC declares the registration effective.
Preliminary Prospectus and Roadshow
Before the SEC signs off, the company distributes a preliminary prospectus to potential investors. It contains everything in the registration statement except the final price and share count. The required disclaimer on the front cover is traditionally printed in red ink, which is why the document is nicknamed the “red herring.” Underwriters use it during the roadshow, a series of presentations to institutional investors in major financial centers that pitches the company and gauges demand. Investors submit non-binding indications of interest, which help the underwriters build an order book and narrow the price range.
Pricing and First Trade
Once the SEC declares the registration effective, the underwriters and management settle on a final offer price, usually the night before trading begins. That price reflects the demand gathered during the roadshow and prevailing market conditions. The shares begin trading the next morning, and on settlement day the company receives the offering proceeds while the shares are formally delivered to investors.
What Underwriters Actually Do
Underwriters are not just salespeople. They stake their reputation and legal exposure on every offering they handle. Federal law lets anyone who buys stock in a public offering sue the underwriter if the registration statement contained a material misstatement or left out an important fact.8Office of the Law Revision Counsel. 15 USC 77k – Civil Liabilities on Account of False Registration Statement The only escape is the due diligence defense: the underwriter must prove it conducted a reasonable investigation and had genuine grounds to believe the statements were true when the registration became effective. That is why underwriters spend weeks drilling into the company’s financials, contracts, and legal risks.
How much risk the underwriter absorbs depends on the deal structure. In a firm commitment offering, the underwriter buys every share from the company outright and then resells them to investors; if demand falls short, the underwriter is stuck holding unsold stock. Most large IPOs and follow-ons use firm commitments because the guaranteed capital gives the company certainty. In a best efforts arrangement, the underwriter agrees only to try to sell the shares, and anything that doesn’t move stays with the company.
Underwriters earn a fee called the gross spread, expressed as a percentage of the total proceeds. For moderate-sized IPOs, a gross spread of exactly 7% has been the industry norm for decades. The percentage drops for very large offerings, where billion-dollar deals have seen spreads below 2%. Before any member firm can participate in a public offering, FINRA reviews the underwriting terms to confirm they are not unfair or unreasonable.9FINRA. Corporate Financing Rule – Underwriting Terms and Arrangements If FINRA objects, the terms must be modified before the deal can proceed.
Most underwriting agreements also include an overallotment option, commonly called a greenshoe, that lets the underwriters sell up to 15% more shares than originally planned. If demand is strong and the stock price rises after trading begins, the underwriters exercise the option and buy the additional shares from the company at the offering price. If the price drops, they can buy shares on the open market at the lower price to cover the overallotment, which helps stabilize the stock. The option typically expires 30 days after the offering.
What the Company Can and Cannot Say
Section 5 of the Securities Act sharply limits what a company can say while an offering is in progress. Before the registration statement is filed, the company cannot make written offers to sell its stock at all. Between filing and the SEC declaring the registration effective, the only written offer permitted is the prospectus itself. Violating these rules, known as “gun-jumping,” can trigger a forced cooling-off period that delays the entire IPO, rescission rights that let buyers demand their money back, and strict liability for misleading statements that weren’t properly vetted.
In practice, the company enters a quiet period that begins when it engages its underwriters and extends through 25 days after the offering date. During this window, the company should avoid public statements about revenue forecasts, growth prospects, or industry trends. The SEC reads “offer” broadly enough to include new corporate advertising campaigns, media interviews about the company’s future, and social media posts. Digital communications get the same scrutiny as traditional ones. Even a line as mild as “we expect to continue to grow” can attract attention. The roadshow presentations to institutional investors are the one sanctioned channel for marketing the stock during this period.
Lock-up Periods After an IPO
After an IPO, company insiders and early investors are typically barred from selling their shares for 180 days. This restriction comes not from federal law but from contractual lock-up agreements negotiated between the underwriters and the company’s directors, officers, and major shareholders. Underwriters insist on lock-ups to prevent a flood of insider selling from tanking the stock price in the weeks after the offering. If founders and executives with large blocks dumped them immediately, it would overwhelm the new market and damage investor confidence.
Lock-ups also send a signal that insiders are betting on the company’s future rather than cashing out at the first opportunity. When the period expires, insider selling often increases noticeably, and the stock price sometimes dips. Investors watch lock-up expiration dates closely for exactly that reason.
How New Shares Affect Existing Shareholders
Whenever a company issues new shares, every existing shareholder’s ownership stake shrinks. If you owned 1% of a company before an offering that increased the total share count by 20%, your stake drops to roughly 0.83%. This is dilution, and it hits earnings per share directly. The same net income divided across more shares produces a lower EPS figure, which can pressure the stock price even if the company’s actual profitability hasn’t changed.
Whether dilution hurts shareholders over the long run depends on what the company does with the money. If the capital funds a project that earns more than the cost of the dilution, shareholders come out ahead. If the money is spent on a poor acquisition, the dilution was a pure loss. Rights offerings exist specifically to address this concern, giving current shareholders the chance to buy their proportional share of new stock and keep their ownership percentage intact. An exercised overallotment option can also create additional dilution beyond the original offering size.
What the Company Owes the SEC Afterward
Going public is not a one-time event. Once an IPO closes, the company takes on ongoing reporting obligations that last as long as the stock trades publicly. The SEC requires annual reports on Form 10-K and quarterly reports on Form 10-Q, with filing deadlines that depend on the company’s size.
Insiders face their own disclosure requirements. Directors, officers, and anyone holding more than 10% of any class of the company’s stock must file a Form 3 within ten days of becoming an insider to disclose initial holdings.10U.S. Securities and Exchange Commission. Insider Transactions and Forms 3, 4, and 5 After that, every purchase or sale of company stock must be reported on Form 4 within two business days. These filings are public, so anyone can see exactly when insiders are buying or selling. A Form 5 is due within 45 days of the fiscal year-end to catch any transactions that slipped through unreported during the year.
These obligations carry real costs. Legal, accounting, and compliance expenses for a public company run well into six figures annually, and companies that were private before the IPO often underestimate how much management time and money ongoing compliance requires.
Direct Listings as an Alternative
Not every company that wants to trade publicly needs the traditional IPO process. In a direct listing, existing shares begin trading on an exchange without underwriters buying and reselling them. There is no roadshow, no bookbuilding, and no underwriter spread. The market itself sets the opening price based on buy and sell orders on the first day of trading.11U.S. Securities and Exchange Commission. Statement on Primary Direct Listings
Both the NYSE and Nasdaq now permit direct listings. NYSE rules even allow companies to sell newly issued shares and raise capital through a direct listing, not just facilitate sales by existing holders. The company still files a registration statement with the SEC, so disclosure requirements are essentially the same as an IPO. What disappears is the underwriter infrastructure: no guaranteed purchase, no price stabilization, no overallotment option. That makes direct listings cheaper but riskier. Without an underwriter managing allocation and stabilizing early trading, first-day price volatility can be substantial. Direct listings tend to work best for well-known companies with strong brand recognition that don’t need underwriters to generate investor interest.