Click to view a price quote on TWTR. : Shares of Citrix  (CTSX)  rose on Tuesday after the software firm said it agreed to buy collaboration software startup and Slack rival Wrike for $2.25 billion in cash. Citrix said the deal, expected to close in the first half of 2021, will be neutral to its non-GAAP earnings per share and free cash flow through fiscal 2022, ending in Dec., and accretive thereafter. Citrix said it expects to fund the transaction with a combination of new debt and existing cash and investments.