Benzinga's Volume Movers

shares climbed 16.12 percent to $13.28. The volume of eHealth shares traded was 897 percent higher than normal. eHealth reported Q1 non-GAAP EPS of $0.26 on revenue of $61.3 million.

surged 15 percent to $448.48. The volume of Amazon.com shares traded 877percent higher than normal. Amazon reported in-line loss for the first quarter, but the company's sales exceeded analysts' estimates. Analysts at JP Morgan upgraded Amazon from Neutral to Overweight and raised the price target from $375.00 to $535.00.

shares moved up 19.58 percent to $28.21. The volume of Gigamon traded was 798 percent higher than normal. Gigamon reported upbeat Q1 results. DA Davidson upgraded Gigamon from Neutral to Buy and raised the price target from $22.00 to $32.00.

shares rose 20.96 percent to $12.12. The volume of Acacia Research shares traded was 555 percent higher than normal. cacia Research reported a Q1 loss of $0.27 per share, while adjusted earnings came in at $0.06 per share.