CVS Health replaced its top executive as it warned that its coming earnings will once again fall short of Wall Street expectations, sending shares of the company down about 5% Friday.David Joyner is taking over as the new chief executive of the struggling healthcare giant,

CVS also released its projections for the company’s upcoming third quarter, saying it expects adjusted earnings of between $1.05 and $1.10 per share—an estimate that fell below analyst estimates of at least $1.69 per share, according to FactSet.

The pharma chain giant recently engaged strategic advisors about possibly breaking off its insurance and retail business.