Benzinga's Volume Movers

Sodastream International Ltd (NASDAQ: SODA) surged 16.70 percent to $17.19. The volume of Sodastream shares traded was 1808 percent higher than normal. Sodastream reported better-than-expected Q1 results.

Customers Bancorp Inc (NYSE: CUBI) shares climbed 5.51 percent to $26.05. The volume of Customers Bancorp shares traded was 650 percent higher than normal. Customers Bancorp will replace Checkpoint Systems Inc. (NYSE: CKP) in the S&P SmallCap 600 after the close of trading on May 13.

21Vianet Group Inc (NASDAQ: VNET) shares moved up 13.05 percent to $16.03. The volume of 21Vianet Group traded was 599 percent higher than normal. 21Vianet Group is expected to release its Q1 financial results on Thursday, May 26, 2016.

Dermira Inc (NASDAQ: DERM) shares rose 14.23 percent to $27.94. The volume of Dermira shares traded was 571 percent higher than normal. Dermira reported a Q1 loss of $0.95 per share and reported positive topline Phase 2b clinical trial results for DRM01 in patients with facial acne vulgaris.