Option traders appear to be setting up for a bullish move on Cogent Inc. (COGT). Traders plowed into 1,571 new call option contracts -- 3.27 times the average volume -- on the stock on Friday. And we know that traders were eager to get into this trade because 99% of the trades came in on the ask price.

Recently, 3M Company (MMM) announced that it was going to acquire Cogent for $10.50 per share. The stock closed Friday at $11.01, up 19.53% during the past month.

MOST NOTEWORTHY: Williams, Kilroy Realty and Dynavax Tech were today's noteworthy upgrades:

• RBC upgraded shares of Williams (NYSE: WMB) to Outperform from Sector Perform to reflect their expectation for three years of double-digit production growth in the company's E&P business.
  
• Kilroy Realty (NYSE: KRC) was upgraded to Outperform from Neutral as they believe the current valuation does not reflect the company's pure asset value.
  
• Oppenheimer upgraded shares of Dynavax Tech (NASDAQ: DVAX) to Outperform from Perform as they expect positive phase III results for Heplisav around mid-2008, driving shares higher.

OTHER UPGRADES:

• UBS raised Linear Tech (NASDAQ: LLTC) and Nalco Holding (NYSE: NLC) to Buy from Neutral.
  
• JP Morgan raised its rating on Verenium (NASDAQ: VRNM) to Neutral from Underweight.
  
• Discover (NYSE: DFS) was upgraded to Overweight from Underweight at Morgan Stanley.