Types of Corporate Actions

With settlement mechanics covered, we shift to the other half of this unit: corporate actions. These are events initiated by public companies that directly affect their securities and shareholders.


What Is a Corporate Action?

  • A corporate action is an event initiated by a public company that affects its securities or shareholders
  • Some corporate actions are mandatory (shareholders have no choice), while others are voluntary (shareholders decide whether to participate)
  • Understanding the difference between mandatory and voluntary actions is a key exam distinction

Corporate Actions at a Glance

Corporate ActionDefinitionMandatory or Voluntary?
Stock splitIncreases shares outstanding; reduces price proportionallyMandatory
Reverse stock splitDecreases shares outstanding; increases price proportionallyMandatory
Stock buyback (repurchase)Company buys back its own shares from the open marketN/A - company initiated
Tender offerPublic offer to buy shares from shareholders at a specified price (usually a premium)Voluntary for shareholders
Exchange offerOffer to exchange one security for another (e.g., new bonds for old bonds)Voluntary for shareholders
Rights offeringExisting shareholders get the right to purchase additional shares at a discount before the publicVoluntary (exercise or sell the rights)
MergerTwo companies combine into one entityMay require shareholder vote
AcquisitionOne company purchases anotherMay require shareholder vote

Mandatory vs. Voluntary

Mandatory actions happen automatically; shareholders do not need to take any action:

  • Stock splits and reverse splits apply to all shares
  • The shareholder's total investment value does not change

Think of it this way: A stock split is like exchanging a $10 bill for two $5 bills. You did not choose it, but you still have the same amount of money.

Voluntary actions require the shareholder to make a decision:

  • Tender offers: Accept the offer and sell shares, or decline and keep them
  • Rights offerings: Exercise the rights, sell the rights, or let them expire
  • Exchange offers: Accept the new security or keep the existing one

Shareholder vote required: Some actions need approval before they proceed:

  • Mergers and acquisitions typically require shareholder approval
  • Shareholders vote via proxy (covered in a later section)

Exam Tip: Gotchas

  • Stock splits are mandatory; tender offers and rights offerings are voluntary. The mandatory vs. voluntary distinction is frequently tested.
  • A stock split changes the number of shares and the price per share, but NOT the total value of a shareholder's position.

Stock Buybacks

  • The company uses its own cash to repurchase shares on the open market
  • Reduces the number of shares outstanding, which increases earnings per share (EPS)
  • Does NOT require shareholder action; the company initiates and executes the repurchase
  • Often signals that management believes the stock is undervalued

Exam Tip: Gotchas

  • A buyback is NOT a voluntary corporate action for shareholders. Shareholders do not decide whether to participate. The company buys shares on the open market like any other buyer.
  • Buybacks reduce shares outstanding, which increases EPS even if total earnings stay the same.