Benzinga's Volume Movers

shares climbed 27.73 percent to $33.90. The volume of OM Group shares traded was 6587percent higher than normal. OM Group, agreed to be acquired by Apollo Affiliated Funds in partnership with Platform Specialty Products Corporation for $34.00 per share in cash.

surged 33.07 percent to $11.95. The volume of Ignyta shares traded 2377 percent higher than normal. Ignyta reported Phase 1 clinical trial data for Entrectinib.

shares moved up 58.91 percent to $14.27. The volume of ImmunoGen traded was 1661 percent higher than normal. IMGN853 demonstrated notable single agent activity for patients with platinum-resistant ovarian cancer.

shares rose 6.16 percent to $51.86. The volume of Altera shares traded was 1359 percent higher than normal.

announced its plans to buy Altera for $16.7 billion.