The 10 Biggest Tech Acquisitions Of 2013

9. IBM Buys Trusteer

IBM significantly expanded its footprint in the cybersecurity arena in August when it disclosed a deal to acquire privately held Trusteer, an Israeli developer of software that organizations use to protect against fraud and other advanced security threats.

IBM did not disclose the cost of the acquisition, which closed on Sept. 3. But published reports at the time said the price tag was in the range of $1 billion.

IBM acquired some pretty advanced security technology through the deal, including Trusteer's security-as-a-service technology delivered through the cloud. IBM also said it would open a cybersecurity lab in Israel with Trusteer's operations at its core.

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