Public company

A public company is a corporation whose stock trades on a public stock exchange and is available for purchase by any investor. Public companies are required to disclose detailed financial information (10-K annual reports, 10-Q quarterly reports, insider trades), undergo audits, comply with corporate governance rules (Sarbanes-Oxley in the US), and hold shareholder votes on major decisions. In exchange for these burdens, they gain access to vast pools of capital and liquidity.

What makes a company public

A company becomes public when it issues stock that is registered with the Securities and Exchange Commission (SEC) and begins trading on a stock exchange like the NYSE or Nasdaq. At that moment, ownership is no longer held by a closed group—the founder, a few investors, a venture capital fund—but is dispersed among potentially millions of shareholders.

Being public is a legal status with powerful consequences. The stock is “freely tradable,” meaning any investor can buy or sell shares on the open market at any time. The company cannot refuse a sale or restrict who owns it (except through disclosure requirements). This liquidity—the ability to convert ownership into cash quickly—is the main draw of public ownership from an investor’s perspective. It is also the main difference between a public company and a private company, where shares are hard to trade and often illiquid.

Obligations and disclosures

The price of public capital is disclosure. Public companies must file detailed financial statements with the SEC and make them available to the public, free of charge, on the SEC’s EDGAR database.

The 10-K is the annual report. It includes audited financial statements (balance sheet, income statement, cash flow statement), a narrative business description, risk factors, executive compensation, and much more. A 10-K can exceed 100 pages and is a crucial read for serious investors.

The 10-Q is the quarterly report, filed within 45 days of each quarter’s end. It includes unaudited (reviewed, but not audited) financial statements and updated disclosures. The 10-Q is where investors first see the company’s quarterly results.

The 8-K is filed for material events—a merger, a CEO resignation, a significant lawsuit, a major contract. The company must file an 8-K within four business days of the event.

Beyond these, insiders (executives and large shareholders) must disclose their stock trades within two business days, and the company must file a proxy statement before the annual shareholder meeting, detailing everything shareholders will vote on.

All of this is expensive. Legal fees, accounting fees, investor relations staff, and compliance infrastructure cost millions per year. For a small company, these costs can be substantial relative to earnings. This is one reason many companies choose to stay private or, after a period as public, go private again.

Sarbanes-Oxley and governance

In 2002, following accounting scandals at Enron and WorldCom, Congress passed the Sarbanes-Oxley Act (SOX), which fundamentally reshaped public company governance. Key requirements:

• Executive certification. The CEO and CFO must personally certify that financial statements are accurate and complete. Lying carries felony penalties.
• Audit committee. The board must have an independent audit committee that hires, fires, and oversees the company’s auditors.
• Annual audit. A certified public accounting firm must audit the company’s financial statements and express an opinion on their accuracy. This is expensive (often $1M+ per year for large companies) and mandatory.
• Internal controls. Management must assess the effectiveness of internal controls over financial reporting, and the auditors must assess management’s assessment.

Sarbanes-Oxley has been praised for raising standards and blamed for imposing excessive costs on smaller public companies. The costs are real, but the benefit of increased transparency and reduced fraud is also real. Few serious observers want to return to the pre-SOX era.

The shareholder vote

Shareholders of a public company have voting rights on major decisions. At the annual meeting, they typically vote on:

• Board of directors. Shareholders elect the board members who oversee the company and hire the CEO. Boards are typically five to twelve people and are elected annually (or staggered in some cases).
• Executive compensation. Shareholders have a non-binding “say on pay” vote on executive compensation packages.
• Mergers and major transactions. A sale of the company or a major acquisition requires shareholder approval.
• Charter amendments. Changes to the company’s bylaws or governance structure require a shareholder vote.

In theory, shareholders are the owners and the board is their agent. In practice, most shareholder votes are not contested. Management puts forward a slate of directors and a compensation package; shareholders typically approve them with little debate. Activist investors and proxy fights exist, but are rare. The typical shareholder influence is indirect: buy the stock if you like it, sell if you do not.

Why companies go public, and why some go private again

Companies go public primarily to raise capital. An initial public offering can bring in billions of dollars that the company can use to fund growth, pay down debt, or reward early investors. The liquidity also makes it easier for employees: restricted stock units and options become tradable, allowing employees to diversify their wealth.

But public ownership comes with costs and constraints:

• Constant scrutiny. Quarterly earnings reports and a stock price that changes daily create pressure for short-term results. Management often faces pressure to beat quarterly estimates rather than build long-term value.
• Expensive governance. Sarbanes-Oxley compliance, audits, regulatory filings, and investor relations staff are costly.
• Hostile takeovers. Being public makes a company vulnerable to acquisition by a competitor or activist investor (though defenses exist).
• Shareholder lawsuits. Public shareholders have the right to sue if they believe they were defrauded or harmed.

For these reasons, some large public companies have gone private in recent years. When a company “goes private,” usually a buyer (often a private equity firm) purchases all outstanding shares and delists the stock. The company no longer has shareholders, must no longer file quarterly reports, and can operate with a longer-term view.

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