What is a person who owns stock in a company called?

A person who owns stock in a company is known as a stockholder. This term specifically refers to an individual or entity that holds shares, which represent ownership stakes in that company. Stockholders have certain rights, such as the ability to vote on corporate matters and receive dividends, if declared.

The term "shareholder" is also frequently used interchangeably with stockholder, as both indicate ownership of shares in a company. However, in the context of the question, the designation of stockholder is the most direct and accurate term reflecting the ownership of stock.

While "investor" is a broader term that encompasses anyone who allocates capital in the expectation of a future financial return—including those who may invest in real estate, bonds, or other assets—it does not specifically denote ownership of stock. A "broker" is a professional who executes buy and sell orders on behalf of clients but does not imply ownership of the stocks themselves.

In summary, the most precise terminology for someone who owns shares is stockholder, making this the correct answer.