The release order was issued by Johor Bahru lower court assistant registrar Saba’aton Daud.
The four men – the son and a special aide of a Johor state government official, a lawyer and a member of the public – had been in remand since Feb 25.
They were among seven people detained for investigation in connection with the case.
The other three, comprising two developers and a contractor, were released on MACC bail on March 3 and 7.
The seven individuals, aged between 25 and 50, were arrested at various locations here in an MACC simultaneous operation on Feb 24.
MACC also seized 21 luxury cars, five high-powered motorcycles, RM500,000 worth of cash including foreign currency and several documents.
Forty-five bank accounts belonging to the suspects, involving a sum of at least RM15.5 million, were also frozen.