Your stocks, bonds, and other assets are likely held in a street name rather than your name if you invest through a broker, company, or bank. It merely indicates that the company is storing your shares on your behalf.
A system is in place at your brokerage to keep track of the shares you possess. You did not purchase real paper stock certificates bearing your name, so this is required. It is a customary procedure. However, there are techniques to ensure that your name appears on your shares if you would like.