The top after-market NASDAQ Stock Market gainers are: Rovi, Imperial Sugar, Pegasystems, ZAGG, and Amtech Systems. The top after-market NASDAQ Stock Market losers are: Conceptus, STEC, Scientific Games, ACADIA Pharmaceuticals, and Mattson Technology.

Gainers

Rovi Corp. (ROVI) stock jumped 12.72 percent to $56 in the after-market trading. Adjusted earnings for the first quarter was $71.7 million or $0.61 per share, up from $50.3 million or $0.45 per share last year. Revenues grew to $161.5 million from $129.4 million, while adjusted revenue rose to $195.4 million from $174.6 million. Analysts had expected earnings of $0.51 per share on revenue of $188.09 million. For the fiscal 2011, the company raised its adjusted earnings guidance to range of $2.25 to $2.55 per share from previous forecast of $2.20 to $2.50 per share. The company reaffirmed its revenue outlook of $775 million to $825 million. Street predicts profit of $2.38 per share on revenue of $807.06 million.

Imperial Sugar Co. (IPSU) stock climbed 10.21 percent to $14.90 in the after-market trading. Profit for the second quarter was $4.2 million or $0.34 per share, compared to a loss of $33.3 million or $2.82 per share last year. Sales fell to $192.2 million from $208.9 million, due to the loss of direct sales volumes from the Gramercy refinery, which commencing January 1, was operated by Louisiana Sugar Refining LLC. Analysts had expected a loss of $0.22 per share on revenue of $143.49 million. Further, the company's board declared the regular quarterly dividend of $0.02 per share, payable June 2, to shareholders of record at the close of business on May 23.

Pegasystems Inc. (PEGA) stock grew 8.78 percent to $40 in the after-market trading. Adjusted profit for the first quarter was $9.6 million or $0.25 per share, up from $6.2 million or $0.16 per share last year. Revenue grew 36 percent to $102.4 million, while adjusted revenue was $103.9 million. Analysts had expected profit of $0.17 per share on revenue of $96.92 million.

Our activity level is very high and our pipeline continues to be strong. After having such a back-end loaded year in 2010, we are excited to get off to such a great start in 2011, but there is still much work to be done to achieve our annual objectives, said Craig Dynes, Chief Financial Officer of Pegasystems.

ZAGG Inc. (ZAGG) stock gained 6.39 percent to $10.16 in the after-market trading. Profit for the first quarter was $3.31 million or $0.13 per share, up from $791,076 or $0.03 per share last year. Sales grew to $26.98 million from $8.78 million. Analysts had expected profit of $0.10 per share on revenue of $20.59 million. For the fiscal 2011, the company raised its revenue guidance to range of $100 million to $110 million from previous range of $95 million to $100 million, while Street predicts $99.92 million. The company also raised its 2011 operating margin outlook to range of 21 percent to 23 percent from previous forecast of 19 percent to 22 percent, while expecting gross margin percentage of mid-to-upper 40s.

Amtech Systems Inc. (ASYS) stock increased 5.81 percent to $22.40 in the after-market trading. Profit for the second quarter was $7.5 million or $0.77 per share, up from $206,000 or $0.02 per share last year. Revenue grew 281 percent to $61.3 million. Analysts had expected profit of $0.51 per share on revenue of $59.0 million. For the full year 2011, the company raised its revenue guidance to surpass $240 million from previous forecast of $230 million, while Street predicts $235.19 million.

For the third quarter, the company expects revenue of $63 million to $66 million, while Street predicts $60.27 million. Amtech said operating margins in the third quarter could be negatively impacted by a trio of factors; higher revenue deferral due to expected continued ramp up of shipments; expected higher material costs; and increased research and development costs resulting from the company's acquisition of Kingstone Technology Hong Kong Limited.

Losers

Conceptus, Inc. (CPTS) stock plunged 14.18 percent to $12.95 in the after-market trading. Loss for the first quarter widened to $2.9 million or $0.09 per share from $2.4 million or $0.08 per share last year. Sales declined to $26.6 million from $33.4 million. Analysts had expected a loss of $0.05 per share on revenue of $32.41 million. For the full year 2011, the company still expects revenue of $135.0 million to $150.0 million, while Street predicts $142.55 million.

STEC, Inc. (STEC) stock plummeted 12.41 percent to $17.58 in the after-market trading. The company expects second quarter adjusted earnings of $0.21 to $0.30 per share and revenue of $80 million to $90 million, while Street predicts profit of $0.31 per share on revenue of $93.74 million. The company reported first quarter adjusted earnings from continuing operations of $16.8 million or $0.32 per share, compared to a loss of $4.0 million or $0.08 per share last year. Revenue surged 144.6 percent to $94.9 million. Analysts had expected profit of $0.32 per share on revenue of $91.59 million for the first quarter.

Scientific Games Corp. (SGMS) stock fell 9.87 percent to $9.50 in the after-market trading. Loss for the first quarter was $6.9 million or $0.08 per share, compared to a profit of $4.9 million or $0.05 per share last year. Revenue fell to $196.7 million from $216.3 million, due to the sale of the Racing Business. Excluding the results of the Racing Business sold on October 5, 2010, revenue increased 2.5 percent. Analysts had expected profit of $0.02 per share on revenue of $201.13 million.

ACADIA Pharmaceuticals, Inc. (ACAD) stock tumbled 8.54 percent to $2.25 in the after-market trading. Loss for the first quarter was $5.8 million or $0.12 per share, compared to a loss of $5.5 million or $0.14 per share last year. Revenue fell to $435,000 from $2.13 million, due to the conclusion of its collaboration with Biovail in October 2010, at which time ACADIA recognized all remaining revenue related to this collaboration. Analysts had expected a loss of $0.11 per share on revenue of $1.50 million.

Mattson Technology Inc. (MTSN) stock slid 7.66 percent to $2.05 in the after-market trading. The company said it plans to offer and sell shares of its common stock in an underwritten public offering.The offering is expected to price on or about May 11. Mattson said it intends to use the net proceeds from this offering for general corporate purposes, which may include working capital, capital expenditures, other corporate expenses, and acquisitions of complementary products, technologies or businesses.