Do The people who start the business determines the ownership of a corporation?

Yes, the people who start a business, typically the founders, determine the initial ownership structure of a corporation through the issuance of shares. They decide how many shares to create, the distribution among themselves and any investors, and the types of shares issued (e.g., common or preferred). However, ownership can change over time through sales of shares, investments, or other transactions. Ultimately, the corporation's bylaws and shareholder agreements also influence ownership dynamics.