#1 Symantec:

As usual, at number one it is the American global computer security software corporation, Symantec.

Headquartered in Mountain View, California, Symantec is a Fortune 500 company and a member of the S&P 500 stock market index.

Symantec competes in the antivirus industry against Avira, Comodo, BullGuard, F-Secure, Frisk, Kaspersky, McAfee, Sophos, Trend Micro, Norman Safeground among others.

Also Symantec competes in the Certificate Authority industry against Comodo, Trend Micro, DigiCert, Entrust, GlobalSign, GoDaddy and others.

According to Gartner, the company retained its No. 1 position in the consumer and enterprise security spaces in 2012, Symantec managed only single-digit growth of 2 percent to reach $3.75 billion in 2012.

As the market shares rose up to 19.6 percent, in terms of revenue, the company did better as in 2011 they marked revenue of $3.6 billion whereas last year the revenue was marked at $3.7 billion.

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