Will the massive data breach at Anthem Inc. shrink its market share? Probably not, says one expert. And an analyst who follows the company foresees no impact on its share price, either. The Indianapolis insurer, which has 37 million current clients nationwide, disclosed on Feb. 4 it was hit by hackers who compromised databases containing Social Security numbers, birth dates and other personal information of up to 80 million current and former policy holders. The company’s Anthem Blue Cross subsidiary in Thousand Oaks is California’s largest for-profit health insurer and serves 8 million state residents. Barry Cohn, chief executive of insurance brokerage and consulting firm RGEB Employee Benefits in Woodland Hills, said that nothing so far that would indicate Anthem will lose customers in California. Among the other insurers with small group plans that compete against Anthem in California, Aetna Inc. is more expensive and Health Net Inc., in Woodland Hills, is comparable in price, Cohn said. “It is too early to tell whether there will be an effect on market share. My gut instinct is to tend to doubt it,” Cohn said. Read the full story in the Feb. 23 issue of the San Fernando Valley Business Journal.