U.S. Securities and Exchange Commission | 152,147 followers on LinkedIn. This account expresses the author's views only and not necessarily those of the Commission or other staff. | The mission of the U.S. Securities and Exchange Commission (SEC) is to protect investors, maintain fair, orderly, and efficient markets, and facilitate capital formation. The SEC holds primary responsibility for enforcing the federal securities laws and regulating the securities industry, the nation's stock and options exchanges, and other electronic securities markets in the United States.