Companies whose shares are expected to trade actively in today’s session are AVG Technologies NV (NYSE:AVG), Sourcefire, Inc. (NASDAQ:FIRE), Hewlett-Packard Company (NYSE:HPQ), Marvell Technology Group Ltd. (NASDAQ:MRVL), Aruba Networks, Inc. (NASDAQ:ARUN) and Frontline Ltd. (NYSE:FRO).

stocks to watch

AVG Technologies NV (NYSE:AVG): The mobile and Internet antivirus company swung into the profit zone during the fourth quarter. Subscriptions and platform revenues grew by double digit percentage points. AVG Technologies NV (NYSE:AVG) also issued optimistic guidance for the current year. Shares soared 7.77 percent to $14.15 in early trading.

Sourcefire, Inc. (NASDAQ:FIRE): The cyber security firm’s fourth quarter profits plunged 36 percent due to higher expenses. But revenues were stronger than expected, and the company’s first quarter forecast easily surpassed Wall Street estimates. Shares gained 13.61 percent to $47.98 in early trading.

Hewlett-Packard Co. (NYSE:HPQ): The technology giant’s first quarter earnings fell 16 percent due to slump in PC and printer sales. But adjusted earnings were better than expected, and revenues came higher than Wall Street estimates. The company also issued upbeat guidance for the current quarter. Shares rose 7.25 percent to $18.34 in early market trading.

Marvell Technology Group Ltd. (NASDAQ:MRVL): The chip maker’s first quarter profits dipped 38 percent despite improved revenues due to higher one-time costs. But the results handily beat analysts’ estimates, and the company gave an upbeat guidance for the first quarter. Shares were up 3.17 percent to $9.77 in early trading session.

Aruba Networks, Inc. (NASDAQ:ARUN): Riding on the strong revenues growth and fewer one-time charges, the Wi-Fi equipment maker swung to the second quarter profit. Revenues topped estimates, and Aruba generated a record $45.7 million in cash flows from operations. Shares surged 27.13 percent to $26.44 in early market trading.

Frontline Ltd. (NYSE:FRO): The company’s revenues improved and its losses narrowed during the fourth quarter. But its free cash flow declined 14 percent to $137.6 million during the quarter. Frontline also said that overcapacity in the tanker market may create significant financial problems in the future. Shares plunged 9.66 percent to $2.63 in the early session.