GAMCO Investors Inc. promoted Agnes Mullady to president and chief operating officer of the open-end fund division of Gabelli Funds LLC.

The Rye, N.Y., based company announced Monday that she will assume full responsibility for all of the company’s open-end funds. In addition, she will oversee the financial reporting of the open and closed-end funds for GAMCO.Mullady will also serve as chief executive of the broker dealer currently in formation to distribute the Gabelli’s open-end funds.

Mullady was hired by GAMCO in December 2005 with 20 years experience in mutual fund treasury operations with various fund companies. In May 2009, she was promoted to senior vice president.

Before joining GAMCO, Mullady was a Senior Vice President at U.S. Trust Co., where she was the treasurer, chief financial and chief accounting officer since February 2004 with the Excelsior Funds complex.

GAMCO had more than $26.1 billion in assets under management as of June 30.