Acme Packet (NASDAQ: APKT ) shares moved up 22.52% to $29.32 at 10:25 am. The volume of Acme Packet shares traded was 2864% higher than normal. Oracle (NASDAQ: ORCL ) announced its plans to buy Acme Packet (NASDAQ: APKT ) for $1.9 billion. Gulfmark Offshore (NYSE: