William Mastrianna is a corporate associate in the firm's Washington, DC office. He advises clients on corporate and securities matters, capital markets transactions, corporate governance considerations and public company disclosure and compliance obligations.

Prior to joining Covington, William served as an attorney-adviser for over five years in the U.S. Securities and Exchange Commission’s Division of Corporation Finance. While at the SEC, he was responsible for reviewing and analyzing a wide range of transactional and securities compliance matters relating to IPOs, offerings of equity and debt securities, M&A transactions, proxy solicitations, and periodic and current reporting. William served as both an examiner and reviewer on the Rule 14a-8 Shareholder Proposal Taskforce in the Division’s Office of Chief Counsel. While on the taskforce, he was responsible for evaluating and recommending the disposition of no-action requests seeking to exclude shareholder proposals.

While at the SEC, William was seconded to the U.S. Department of the Treasury to serve as a senior policy advisor to the Deputy Assistant Secretary for Capital Markets.