Dionex Corp. (NasdaqGS: DNEX) prospered 20.13 percent in price Monday afternoon to $117.93. Volume was 1,176,138 shares squashed the stock’s normal daily average of 62,998, amid word that DNEX is being probed for shareholders in connection with the proposed acquisition by Thermo Fisher Scientific. The investigation seeks to determine whether Dionex and its Board breached their fiduciary duties by entering into the agreement without properly shopping for a deal that would provide better value for shareholders.

Huntington Bancshares Inc. (NasdaqGS: HBAN) traded in 37,557,116 shares, almost 2-and-a-half times its normal daily average. Prices for HBAN pointed downward, though, 4.61 percent to $6.53. The Columbus, Ohio-based bank today announced commencement of an underwritten public offering of $920 million of its common stock. Goldman, Sachs & Co. will act as sole bookrunner and Sandler O’Neill + Partners, L.P. will act as co-manager for the proposed equity offering.

Miller Petroleum Inc. (NasdaqGM: MILL) staggered 13.06 percent to $4.46 on Monday afternoon. Volume was 882,425 shares, four times its full-day average. MILL is a high-growth oil and natural gas exploration, production and drilling company