The chairman of U.S. asset management giant Capital Group Companies, Jim Rothenberg, has died.

The Los Angeles-based company announced that Rothenberg, who recently marked 45 years with the company, died Tuesday from a heart attack.

Rothenberg was one of eight members of the firm’s management committee, and he previously worked as vice chairman of the board, and as a portfolio manager of Growth Fund of America.

In additionally, he was treasurer of Harvard University from 2004-2014. Rothenberg sat on the boards of the California Institute of Technology, the RAND Corporation and Huntington Memorial Hospital, and was a governor of the Investment Company Institute (ICI).

“His intellect, passion and energy were a source of inspiration to all of us and to our more than 7,600 associates worldwide. Our hearts go out to his family and to all who were touched by his extraordinary talents,” the firm’s management committee said in a statement.

Capital Group began managing assets for Canadian institutions in 1985 and opened a research office in Toronto in 1998. In 2000, it began making Capital International portfolios available in Canada.

The company currently has approximately US$1.25 trillion in assets under management (AUM) — more than the entire Canadian fund industry combined.