I am trying to stop a sub from continueing once a set of values i.e. null in
2 cells is attained. Can anyone help me?

Range("A4:w4").Select
Do Until ActiveCell.Value = ""
'Moves #1 PM info down until date matches #4 PM date

If ActiveCell.Value < ActiveCell.Offset(0, 12).Value Then
ActiveCell.Offset(0, 12).Resize(, 11).Insert shift:=xlDown
MsgBox "Loop #1 Column A < Column M"

'If #4Pm's date is greater then #1 PM's date then shift #4 down.
ElseIf ActiveCell.Value ActiveCell.Offset(0, 12).Value Then
ActiveCell.Resize(, 12).Insert shift:=xlDown
MsgBox "Loop #2 Column A Column M
End If

If ActiveCell.Value = ActiveCell.Offset(0, 12).Value And
ActiveCell.Offset(1, 12).Value = "" Then
MsgBox "A = M AND M = Blank"
Kill statement needs to go here
End If

ActiveCell.Offset(1, 0).Select

Loop

End Sub