Which of these reflects a person who owns shares in a corporation?

The term that best reflects a person who owns shares in a corporation is "Shareholder." A shareholder, also known as a stockholder, is specifically someone who holds shares of stock in a corporation, thereby having a claim on part of the company's assets and earnings. Shareholders can play a significant role in a company's governance, often being able to vote on important matters such as the election of the board of directors or major business decisions.

While an investor can also own shares in a corporation, the term is broader and encompasses anyone who allocates capital with the expectation of a return, which may include bonds, real estate, or other types of investments beyond just stocks. A subscriber typically refers to someone who has agreed to buy shares, often during the initial issuance, but this doesn't necessarily imply ongoing ownership. A manager, on the other hand, is someone responsible for overseeing the operations of a business, which does not inherently involve ownership of shares in the company.

Therefore, "Shareholder" is the most accurate term to denote ownership of shares specifically in a corporation.