The top after-market NASDAQ stock market losers are: SMART Modular Technologies, ValueVision Media, Regeneron Pharmaceuticals, TriQuint Semiconductor, Affymetrix, Avago Technologies, Comcast, Infinera, Arch Capital Group, and VeriSign.

SMART Modular Technologies (WWH) Inc. (SMOD) lost 10.68 percent to $5.69 in the after-hours trading. The company's adjusted profit for first quarter was $17.6 million or 27 cents a share, up from $5.4 million or 8 cents a share last year. Sales rose to $216.4 million from $123.1 million. Analysts had expected profit of 25 cents a share on revenue of $218.16 million.

SMART Modular expects second quarter adjusted earnings of 9 cents to 11 cents a share and sales of $165 million to $185 million. Street expects profit of 19 cents a share on revenue of $197.40 million.

ValueVision Media Inc. (VVTV) fell 3.61 percent to $4 in the after-market session. The company said it plans to offer shares of its common stock in an underwritten public offering pursuant to an effective shelf registration statement. Piper Jaffray & Co. is acting as sole underwriter in the offering.

Regeneron Pharmaceuticals, Inc. (REGN) plummeted 3.12 percent to $31.03 in the after-hours trading. Brokerage firm MP Advisors downgraded its rating on shares of Regeneron to 'market perform' from 'outperform'.

TriQuint Semiconductor, Inc. (TQNT) plunged 3.07 percent to $11.98 in the after-market session.

Affymetrix Inc. (AFFX) dropped 2.66 percent to $4.76 in the after-hours trading.

Avago Technologies Ltd. (AVGO) slid 2.26 percent to $27.01 in the after-market session.

Comcast Corp. (CMCSA) tumbled 2.03 percent to $21.21 in the after-hours trading. Level 3 Communications Inc.'s (LVLT) chief executive officer James Crowe asked U.S. antitrust officials to impose conditions on Comcast's proposed acquisition of NBC Universal, according to Reuters.

Level 3's suggested conditions include that Comcast should interconnect with Internet backbone carriers on non-discriminatory, fair and reasonable terms, and that Comcast may not utilize its dominant control over access to its subscribers in order to unfairly charge Internet backbone carriers for interconnection to its network.

Infinera Corp. (INFN) declined 1.73 percent to $10.81 in the after-market session.

Arch Capital Group Ltd. (ACGL) fell 1.11 percent to $87.88 in the after-hours trading.

VeriSign Inc. (VRSN) moved down 1.00 percent to $33.77 in the after-market session. Brokerage firm Oppenheimer downgraded its rating on shares of VeriSign to 'perform' from 'outperform'.

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