Move line matching string to top of the file

Need to move single line with PRM:TRG keyword to top of the file using sed

File content:

FOOBAR:SCN:NO_TRG
FIZZBAR:SCN:NO_TRG
BEBAR:PRM:TRG

Output expected:

BEBAR:PRM:TRG
FOOBAR:SCN:NO_TRG
FIZZBAR:SCN:NO_TRG