Benzinga's Top #PreMarket Gainers

Giga-tronics, Incorporated GIGA shares rose 108.11 percent to $2.31 in pre-market trading following the announcement of a software licensing agreement with Lockheed Martin Corporation LMT. Abengoa SA (ADR) ABGB shares rose 14.08 percent to $2.35 in pre-market trading after jumping 19.08 percent on Monday. Arena Pharmaceuticals, Inc. ARNA shares climbed 11.72 percent to $2.67 in pre-market trading after surging 11.16 percent on Monday. Eisai and Arena Pharmaceuticals reported the completion of enrollment in BELVIQ® (lorcaserin HCI) CAMELLIA-TIMI 61 study. Synthetic Biologics Inc SYN gained 11.23 percent to $3.17 in pre-market trading after announcing positive topline results from first Phase 2A clinical trial of SYN-004 for the prevention of C. difficile infection. Mattress Firm Holding Corp MFRM shares surged 7.78 percent to $53.20 in pre-market trading. Mattress Firm agreed to acquire HMK Mattress Holdings LLC, the holding company of Sleepy's and related entities, for $780 million. The company reported preliminary Q3 adjusted earnings of $0.80 to $0.82 per share, and sales growth of 50.7 percent.