Sebastian Marotta advises public and private companies on a broad range of corporate and securities matters, including mergers and acquisitions, capital markets transactions, corporate governance, and securities disclosure.

Sebastian represents clients across industries, with particular experience in the financial services, life sciences, and technology sectors. His transactional practice includes mergers and acquisitions, strategic investments, joint ventures, and a variety of capital markets matters, such as registered offerings, private placements, and other financing transactions. He also counsels public companies on Securities Act and Exchange Act reporting, proxy preparation, beneficial ownership reporting, and compliance with stock exchange and SEC disclosure requirements.

In addition to his transactional work, Sebastian regularly advises boards of directors and management teams on corporate governance matters, including board and committee composition, governance and organization, insider trading, and related topics.

Sebastian is committed to pro bono service. His recent pro bono work includes advising multiple nonprofit organizations on corporate and governance matters, assisting with immigration and asylum matters, and representing CFBanc Corporation in its merger of equals with Broadway Financial Corporation, which created the largest Black‑led Minority Depository Institution in the United States. Sebastian also serves on the board of directors of the Washington Area Community Investment Fund, a nonprofit organization and leading Community Development Financial Institution dedicated to developing small businesses and expanding economic opportunity across the Washington, D.C. metropolitan area.