Somanetics (SMTS) was the most advancing stock in the Nasdaq Wednesday morning, with shares up more than 31%, or nearly $6 to $24.85. Shares reacted to news that Covidien (COV) is buying Somanetics, acquiring all of the outstanding shares of Somanetics for $25.00 per share in cash, a 32% premium to Tuesday's close. Covidien will pay a total of $250 million, for a total transaction value of approximately $300 million.

Covidien, a drug and medical devices maker, is already the distributor for Somanetics' noninvasive diagnostic equipment called INVOS (In-Vivo Optical Spectroscopy) Cerebral/Somatic Oximeter in Europe, the Middle East and Africa. INVOS monitors patients and continuously measures blood oxygen levels in the brain and in the body to help detect and correct complications.

The earnings crunch is in full swing, and here are a few of the highlights of this past week's earnings coverage from BloggingStocks:

• Allegheny Technologies Inc. (NYSE: ATI) posted lower fourth-quarter profits but record full-year sales.
• Amazon.com Inc. (NASDAQ: AMZN) posted strong results and offered bullish guidance (see transcript).
• Concur Technologies Inc. (NASDAQ: CNQR) revenue soared and it offered revised guidance.
• Countrywide Financial Corp. (NYSE: CFC) posted a bigger-than-expected loss for the fourth-quarter.
• Eli Lilly & Co. (NYSE: LLY) beat earnings expectations but fell short of revenue estimates.
• EMC Corp. (NYSE: EMC) beat estimates but shares were dragged down by VMware results.
• Google Inc. (NASDAQ: GOOG) shocked investors and missed earnings expectations (see transcript).
• Intuitive Surgical Inc. (NASDAQ: ISRG) beat estimates as revenue soared.
• Lazard Ltd. (NYSE: LAZ) sidestepped the subprime mess and fourth-quarter earnings soared.
• MBIA Inc. (NYSE: MBI) reported a $2.3 million loss due to mortgage write downs.
• Merck & Co. (NYSE: MRK) posted a $1.6 million loss and lowered its full-year guidance.
• Monster Worldwide Inc. (NASDAQ: MNST) posted strong results despite weakness in North America.
• ScanSource Inc. (NASDAQ: SCSC) beat earnings estimates but matched revenue forecasts.
• Somanetics Corp. (NASDAQ: SMTS) beat estimates and offered revised guidance.
• Symantec Corp. (NASDAQ: SYMC) beat expectations on revenue growth from overseas.
• UBS (NYSE: UBS) reported a record loss for the fourth quarter due to the subprime crisis.
• VMware Inc. (NYSE: VMW) missed revenue forecasts, sending shares tumbling.
• Yahoo! Inc. (NASDAQ: YHOO) posted unimpressive results, but beat earnings expectations (see transcript).

For additional BloggingStocks earnings highlights, see Exxon, Boeing, Halliburton, Sony, UPS, Honda, and others and McDonald's, Kraft, P&G, Verizon, MasterCard, 3M, and others.