Donegal Group Inc. CEO To Take Medical Leave Of Absence By: Benzinga via Benzinga August 29, 2014 at 16:01 PM EDT Donegal Group Inc. (Nasdaq: DGICA) (Nasdaq: DGICB), announced today that its chief executive officer, Donald H. Nikolaus, will be on a ... Read More >> Related Stocks: Donegal Group Cl A Donegal Group Cl B