Chris Ratcliffe | Bloomberg | Getty Images
Twitter shares surged more than 21 percent Friday after sources told CNBC the social media company may be moving closer to selling itself.
According to sources, potential suitors include Google and Salesforce.com, among other tech companies.
More than 191 million shares were traded on Friday, Twitter's highest volume day ever. It was also the stock's best daily performance since its IPO in 2013, when it gained 72.69 percent.
Twitter's five day performance:
Read the latest on Twitter here.
--CNBC's Gina Francolla contributed to this report.