Activist investor Elliott takes stake in Slack owner Salesforce

Investment group typically buys stakes in underperforming firms and seeks changes to way they are run

The activist investor firm Elliott Investment Management has take a multibillion-dollar stake in Salesforce, the business software company that owns the Slack messaging platform.

Elliott, which typically buys stakes in underperforming companies and seeks changes to the way they are run, said it was looking forward to working “constructively” with the San Francisco-based company, without revealing any strategic proposals.