Allstate Corp., the $32.6 billion Northbrook, Ill., insurance company, named Steven Shebik CFO and executive vice president. He succeeds Don Civgin, who was appointed president of Allstate Financial. Shebik, 55, has been CFO and senior vice president of Allstate Investments since January 2009. In his 17 years with the insurer, he has served as CFO and senior vice president for both the Allstate Protection and Allstate Financial segments, and as the company's senior vice president of accounting, financial systems and integration, assistant treasurer and vice president of finance.

Activision Blizzard, a $4.7 billion online and mobile game publisher, appointed Dennis Durkin CFO. He succeeds interim CFO Thomas Tippl, who will continue to serve as COO. Durkin, 41, joins the Santa Monica, Calif., company after 13 years with Microsoft, where he most recently was CFO, COO and corporate vice president of the company's interactive entertainment business, which includes Xbox. Durkin also served on Microsoft's corporate development and strategy team, and previously was a financial analyst at the investment bank Alex. Brown.

Harbinger Group, a $3.4 billion New York City-based company that sells life insurance, named Thomas Williams CFO and executive vice president. He succeeds Francis McCarron, who resigned. Williams, 52, was president and CEO of RDA Holding and its subsidiary, Reader's Digest Association, having previously served as the companies' CFO since 2009. Earlier, he was CFO and executive vice president for Affinion Group Holdings and spent more than 21 years in finance roles at AT&T, including serving as CFO of AT&T Networks.