Benzinga's Top #PreMarket Gainers

RadioShack

jumped 29.67% to $1.180 in pre-market trading after the company announced the resignation of its chief financial officer and named Holly Etlin as interim CFO. Tower Group International

shares climbed 11.66% to $2.49 in pre-market trading after gaining 7.73% on Friday. ACP Re has received all regulatory approvals required in connection with its earlier announced acquisition of Tower Group. On Track Innovations

shares surged 11.58% to $4.24 in pre-market trading after jumping 15.50% on Friday. ReWalk Robotics

rose 9.37% to $28.00 in pre-market trading after gaining 113.33% on Friday. ReWalk Robotics priced its IPO of 3 million shares at $12 per share. Halozyme Therapeutics

jumped 9.26% to $10.27 in pre-market trading following the FDA approval of HYQVIA.