Calpine Corp. announced the death of William J. Patterson, 48, chairman of its board of directors since January 2008. A private investor and philanthropist in the San Francisco Bay Area, Patterson was a managing director of SPO Partners & Co., an approximate 21% owner of Calpine since it emerged from Chapter 11 bankruptcy in early 2008. Prior to that Patterson chaired the creditors committee that steered Calpine through the bankruptcy process. Ultimately he helped rebuild the board and management team. Calpine said "in due course" its board will meet and appoint a new chairman. Patterson died Sept. 24.

Sempra Energy has re-elected leading Mexican businessman and government official Luis Tellez to the company's board of directors. Tellez had previously served as a Sempra director before Mexican President Felipe Calderon and former President Ernesto Zedillo appointed him to top positions in the federal government. Tellez currently serves a chairman of the board and CEO of the Mexican Stock Exchange. Tellez served on Sempra's board in 2006 and then was appointed Mexico's Secretary of Communications and Transportation, a position he held until last year.

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