Zimmer Holdings Inc. (NYSE:ZMH) soared $10.61, or 12 percent, to $102.07 after announcing it would buy the privately held orthopedic device company Biomet for $13.35 billion in cash and stock. Zimmer Holdings, Inc. (NYSE:ZMH) stock performance was 11.50% in last session and finished the day at $101.97. Traded volume was 12.39million shares in the last session and the average volume of the stock remained 1.19million shares. The beta of the stock remained 1.07. Zimmer Holdings, Inc. (NYSE:ZMH) insider ownership is 0.20%.

Nano cap Cesca Therapeutics Inc (NASDAQ:KOOL) shows bullish price action with today’s up move on a 10x surge in volume. It represents a successful retest of the January 21 breakout when prices popped 111% on massive turnover of 32.9M shares after the company announced positive Phase 1b clinical trial results for its stem cell therapy for critical limb ischemia. Cesca Therapeutics Inc (NASDAQ:KOOL) acquired development partner TotipotentRX shortly thereafter and changed its name from Thermogenesis. Last month, it submitted a pre-IDE information package to the FDA for the product, now called SurgWerks, as the first step in its commercialization efforts in the U.S.Considering its microscopic market cap of $66M, retail investors should insist on thorough due diligence before considering deploying capital. Cesca Therapeutics Inc (NASDAQ:KOOL) rose 28.75 percent to $2.06 Thursday on volume of 9.41million shares. The intra-day range of the stock was $1.76 to $2.19. Cesca Therapeutics Inc (NASDAQ:KOOL) has a market capitalization of $67.18million.

Among notable earnings on Thursday, drugmaker Eli Lilly & Co reported revenue that missed expectations, while insurer Aetna Inc (NYSE:AET)’s earnings topped forecast. Aetna Inc (NYSE:AET)’s stock on Apr 24, 2014 reported a increase of 5.88% to the closing price of $72.96. Its fifty two weeks range is $56.05 -$76.71. The total market capitalization recorded $26.08billion. The overall volume in the last trading session was 5.67million shares. In its share capital, AET has 362.70million outstanding shares.

Mallinckrodt PLC (NYSE:MNK) was upgraded by analysts at CRT Capital from a sell rating to a fairly valued rating. On Thursday, shares of Mallinckrodt PLC (NYSE:MNK) advanced 5.10% to close the day at $67.61. Company return on investment (ROI) is 3.50% and its monthly performance is recorded as 2.66%. Mallinckrodt PLC (NYSE:MNK) quarterly revenue growth is 11.02%.