Benzinga's Volume Movers

FEI Company (NASDAQ: FEIC) surged 13.66 percent to $107.50. The volume of FEI Company shares traded was 3522 percent higher than normal. FEI Company agreed to be acquired by Thermo Fisher Scientific Inc. (NYSE: TMO) for $4.2 billion.

Big Lots, Inc. (NYSE: BIG) shares climbed 9.75 percent to $48.98. The volume of Big Lots shares traded was 886 percent higher than normal. Big Lots reported stronger-than-expected results for the first quarter and raised its full-year forecast.

Relypsa Inc (NASDAQ: RLYP) shares moved up 18.04 percent to $19.59. The volume of Relypsa traded was 644 percent higher than normal. According to the TheStreet'sAdam Feuerstein, Relypisa scored a "big win" on Friday after its chief rival AstraZeneca plc (ADR) (NYSE: AZN) confirmed the U.S. Food and Drug Administration sent a Complete Response Letter (CRL) concerning its hyoperkalaemia treatment known as ZS-9. Feuerstein suggested that AstraZeneca's setback is "fantastic news" for Relypsa, who just secured FDA approval for its rival drug Veltassa last October.

Veeva Systems Inc (NYSE: VEEV) shares rose 10.03 percent to $32.75. The volume of Veeva Systems shares traded was 643 percent higher than normal. Veeva reported better-than-expected results for the first quarter and issued a strong revenue forecast for the year.