Business software company Salesforce.com Inc. said Monday it has completed its acquisition of social media tracking company Radian6.

Financial terms of the deal were not disclosed.

Radian6's technology captures conversations on Facebook, Twitter, LinkedIn and other popular websites to help clients market their products or services.

The acquisition gives Salesforce.com the ability to monitor and join such online conversations, the company said.

Shares in Salesforce.com ended the regular session down $2.41 to $136.19 on Monday.