Corporate action
A corporate action is an event initiated by a company that affects its outstanding securities or shareholders, such as a dividend, stock split, merger, tender offer, or rights offering. Actions may be mandatory or voluntary.
A corporate action is any event a company's board of directors initiates that changes its outstanding securities or directly affects its shareholders. Common examples include cash and stock dividends, forward and reverse stock splits, mergers and acquisitions, spin-offs, tender offers, and rights offerings.
Corporate actions fall into two broad groups. Mandatory actions apply to every shareholder automatically — a cash dividend, a stock split, or a merger completed by vote requires nothing from the individual investor. Voluntary actions require a shareholder decision: whether to tender shares in a buyback offer, exercise rights in a rights offering, or convert a convertible security. Some events, like electing cash versus stock in a merger, are mandatory with options.
Mechanically, corporate actions often adjust a stock's price and share count without changing total value. In a 2-for-1 split, an investor holding 100 shares at $80 ends up with 200 shares at $40 — the position is still worth $8,000. Understanding these adjustments matters for cost basis, options contracts, and open orders, all of which are modified when a corporate action takes effect.
Securities exams test corporate actions from two angles. The Series 7 exam covers the mechanics — split math, dividend dates, rights and tender offers — while the Series 63 exam addresses when corporate actions like stock dividends and splits do or do not count as an "offer" or "sale" under state securities law. Know both the arithmetic and the regulatory definitions.
Key takeaways
- A corporate action is a board-initiated event affecting a company's securities or shareholders — dividends, splits, mergers, tender offers, rights offerings.
- Mandatory actions apply automatically to all shareholders; voluntary actions require each investor to respond.
- Splits and stock dividends change share count and price but not the total value of a position.
- The Series 7 tests corporate action mechanics, while the Series 63 tests how they are treated under state securities law definitions of offers and sales.