The top after-market NASDAQ Stock Market gainers are: Steel Dynamics, SMART Modular Technologies, Silicom, Zions Bancorp, and Synthesis Energy Systems. The top after-market NASDAQ Stock Market losers are: China XD Plastics Company, Identive Group, NetEase.com, Netlist, and A-Power Energy Generation Systems.

Gainers

Steel Dynamics Inc. (STLD) stock grew 4.81 percent to $18.30 in the after-market trading, as its first quarter earnings and revenue exceeded Street view. Profit was $105.9 million or 46 cents a share, up from $65.0 million or 29 cents a share last year. Sales rose to $2.02 billion from $1.56 billion. Analysts had expected profit of 41 cents a share on revenue of $1.81 billion. Steel shipments grew 4 percent to 1.5 million tons, and average external steel selling price jumped to $890 from $736.

SMART Modular Technologies (WWH) Inc. (SMOD) stock grew 4.64 percent to $8.35 in the after-market trading. The company said the U.S. Patent & Trademark Office has rejected 50 of 51 claims in Netlist Inc.'s (NLST) U.S. patent in a first office action in SMART's reexamination of the patent. Netlist's patent relates to rank multiplication technology associated with high density registered DIMMs that support the high growth server market.

The U.S. Patent & Trademark Office rejected Netlist's patent claims on multiple grounds including that SMART's patent application invalidates claims. SMART believes its application shows that SMART engineers invented rank multiplication technology in 2003. As SMART's application was filed before the Netlist's Patent, SMART believes that Netlist is not entitled to the patent.

Silicom Ltd. (SILC) stock gained 4.37 percent to $20.55 in the after-market trading.

Zions Bancorp. (ZION) stock increased 4.31 percent to $23.95 in the after-market trading. Profit for the first quarter was $14.8 million or 8 cents a share, compared to a loss of $86.5 million or 57 cents a share last year. Adjusted earnings for the latest quarter were $52.6 million or 29 cents a share. Net interest income declined to $423.86 million from $455.3 million, while non-interest income rose to $134.14 million from $107.61 million. Analysts had expected a loss of 17 cents a share on revenue of $560.96 million.

Synthesis Energy Systems, Inc. (SYMX) stock rose 3.48 percent to $3.87 in the after-market trading.

Losers

China XD Plastics Company Ltd. (CXDC) stock plunged 6.32 percent to $4.28 in the after-market trading.

Identive Group, Inc. (INVE) stock fell 5.08 percent to $3.55 in the after-market trading. The company's business unit SCM Microsystems said it has received its first orders for 10,000 eHealth terminals to support the relaunch of the electronic health card program in Germany. SCM has begun shipping both its eHealth200 desktop and eHealth500 mobile health card terminals for the program, which involves the deployment of more than 80 million electronic health insurance cards to German citizens.

NetEase.com, Inc. (NTES) stock slid 3.96 percent to $51.39 in the after-market trading.

Netlist Inc. (NLST) stock tumbled 2.54 percent to $2.30 in the after-market trading. SMART Modular Technologies WWH Inc. (SMOD) said said the U.S. Patent & Trademark Office has rejected 50 of 51 claims in Netlist's U.S. patent in a first office action in SMART's reexamination of the patent. Netlist's patent relates to rank multiplication technology associated with high density registered DIMMs that support the high growth server market.

The U.S. Patent & Trademark Office rejected Netlist's patent claims on multiple grounds including that SMART's patent application invalidates claims. SMART believes its application shows that SMART engineers invented rank multiplication technology in 2003. As SMART's application was filed before the Netlist's Patent, SMART believes that Netlist is not entitled to the patent.

A-Power Energy Generation Systems, Ltd. (APWR) stock declined 2.45 percent to $4.09 in the after-market trading.