Benzinga's Volume Movers

shares climbed 40.81 percent to $17.39. The volume of Heron Therapeutics shares traded was 5933 percent higher than normal. Heron Therapeutics reported positive results from its Phase 3 MAGIC study of SUSTOL®.

surged 4.85 percent to $19.87. The volume of Geeknet shares traded 493 percent higher than normal. Geeknet determined that the binding offer from a strategic buyer at $20 per share in cash constitutes a 'superior proposal.'

shares moved up 7.09 percent to $43.82. The volume of GameStop traded was 468 percent higher than normal. GameStop reported stronger-than-expected earnings for the first quarter and raised its earnings forecast for the year.

shares rose 6.57 percent to $20.85. The volume of iKang Healthcare Group shares traded was 410 percent higher than normal. iKang is expected to report unaudited Q4 earnings on June 8, 2015.