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Corporate action

A corporate action is an issuer or fund event that changes a security, its cash flows, its share count, or the rights attached to it.

By Betta Signals Research Desk · Reviewed October 24, 2026

Plain-English definition: A corporate action is an issuer or fund event that changes a security, its cash flows, its share count, or the rights attached to it.[1]

How the term is used

Dividends, splits, mergers, spin-offs, tender offers, symbol changes, and liquidations can alter a historical series. Some actions change only the number of shares; others transfer cash or create a new security.[1]

What to check before relying on it

Use the action type, ex-date, record date, payable date, ratio or cash amount, currency, and successor identifiers. A price chart can be wrong when one event is missing or applied twice.

Example

A spin-off may lower the parent's quoted price while giving holders shares in a new company. Treating the price drop as a pure loss would omit part of the value received.

DistributionStock splitAdjusted close

Research last reviewed: October 24, 2026. This definition is educational and does not evaluate a particular security.

Sources

  1. FINRA: Corporate Actions by Public Companies — dividends, splits, name changes, mergers, bankruptcy, and their effects on shareholders. Accessed October 24, 2026.