A share is a single unit that represents an ownership interest or entitlement to a proportion of an entity’s assets and earnings. In corporate finance a share usually denotes equity in a company and may carry rights such as voting at shareholder meetings and receiving dividends. The term also applies to ownership units issued by collective investment vehicles and other business structures; for example, people often refer to stocks when discussing corporate shares, and to units in pooled vehicles as shares or units.

Characteristics and common types

Shares vary by the rights they convey and the legal form that issues them. Common categories include:

  • Common (ordinary) shares — typically provide voting rights and variable dividends, reflecting the company’s performance.
  • Preferred shares — usually offer fixed or preferential dividends and priority over common shares in distributions, but often limited voting rights.
  • Investment fund units — many mutual funds and exchange-traded funds issue redeemable or tradable shares; these are sometimes described as fund shares or units (mutual funds being a common example).
  • Specialized shares — shares issued by REITs, limited partnerships or other structures that reflect the legal and tax treatment of the issuer.

Rights, risks and economic role

Owning a share usually means a residual claim on net assets after creditors and preferred claimants have been paid, and exposure to business risks and rewards. Shareholders may receive dividends, benefit from capital gains if market prices rise, and influence corporate decisions through voting. However, shares carry market risk, including price volatility and the potential loss of invested capital. Shares typically do not guarantee returns like bonds do.

Issuance, trading and market context

Shares are created when an entity issues them to raise capital, often in a primary offering such as an initial public offering (IPO). After issuance they trade in secondary markets — exchanges or over-the-counter venues — where supply and demand determine price. Market capitalization, liquidity, and regulatory requirements differ by jurisdiction. In British English the word share is commonly used where American English might use "stock," a distinction that reflects language more than a technical difference.

Shares are fundamental to corporate finance and investing. They enable companies to obtain capital without taking on debt and give investors a vehicle for ownership, income, and long-term growth, while also exposing them to governance decisions and market cycles.