Umpqua Holdings Corporation Announces April 26 as Scheduled Closing Date for North Bay Bancorp Merger

  
    
  
  
    
      Umpqua Holdings Corporation (Nasdaq:UMPQ), parent company of Umpqua Bank 
      and Strand, Atkinson, Williams & York, Inc., and California-based North 
      Bay Bancorp (NASDAQ:NBAN), today announced that the closing of the 
      pending merger of North Bay with and into Umpqua is scheduled for April 
      26, 2007, subject to approval of North Bay shareholders on April 25, 
      2007. Based on the scheduled April 26 closing, North Bay shareholders 
      will receive 1.2280 shares of Umpqua common stock for each share of 
      North Bay common stock. Umpqua also announced that system conversion of 
      North Bay is scheduled for May 5, 2007.
    
    
      About Umpqua Holdings Corporation
    
    
      Umpqua Bank, headquartered in Roseburg, Ore., is a subsidiary of Umpqua 
      Holdings Corporation (NASDAQ: UMPQ) and has 134 locations between 
      Sacramento, Calif. and Bellevue, Wash., along the Oregon and Northern 
      California Coast and in Central Oregon. Umpqua Bank has been recognized 
      for its innovative customer experience and creative strategy by leading 
      national publications including the Wall Street Journal, New York Times, 
      BusinessWeek, Fast Company and CNBC. Umpqua Holdings also owns retail 
      brokerage subsidiary Strand, Atkinson, Williams & York, Inc., which has 
      locations in Umpqua Bank stores and in dedicated offices throughout 
      Oregon and Southwest Washington. Umpqua Bank's Private Client Services 
      Division provides tailored financial services and products to individual 
      customers. Umpqua Holdings Corporation is headquartered in Portland, 
      Ore. For more information, visit www.umpquabank.com.
    
    
      About North Bay Bancorp
    
    
      North Bay Bancorp is the holding company for The Vintage Bank in Napa 
      County and Solano Bank, a Division of The Vintage Bank, in Solano 
      County. This full-service commercial bank offers a wide selection of 
      deposit, loan and investment services to local consumers and small 
      business customers. The Vintage Bank opened in 1985 and now operates six 
      banking offices in Napa County, Northern California's number one tourist 
      destination and the nation's premier wine producing region. The main 
      office and two branch offices are located in the City of Napa. Vintage 
      also has branches in the city of St. Helena, American Canyon and the 
      Southern industrial area of Napa County. Solano Bank, a Division of The 
      Vintage Bank, launched in July 2000, has offices in the primary cities 
      along the I-80 corridor of Solano County, including Vacaville, 
      Fairfield, Vallejo and Benicia and an off-site ATM facility in downtown 
      Fairfield. Solano County is projected to be the fastest growing county 
      in Northern California through year 2030, and is attracting businesses 
      and residents with a quality lifestyle, affordable housing and 
      business-friendly attitudes.
    
    
      This press release includes forward-looking statements regarding the 
      merger of Umpqua Holdings Corporation and North Bay Bancorp within the 
      meaning of the "Safe-Harbor" provisions of the Private Securities 
      Litigation Reform Act of 1995, which management believes are a benefit 
      to shareholders. These statements are necessarily subject to risk and 
      uncertainty and actual results could differ materially due to certain 
      risk factors, including those set forth from time to time in the 
      company's filings with the SEC. You should not place undue reliance on 
      forward-looking statements and we undertake no obligation to update any 
      such statements. Specific risks in this press release relate to the 
      success and timing of the conversion of North Bay’s 
      systems, the timing of the merger closing, whether all closing 
      conditions to the merger are satisfied and North Bay shareholder 
      approval at a meeting to be held on April 25, 2007.
    
    
      The foregoing may be deemed to be offering materials of Umpqua 
      Holdings Corporation and solicitation of materials of North Bay Bancorp 
      in connection with the proposed merger of North Bay with and into Umpqua. 
      North Bay shareholders are urged to read the proxy 
      statement/prospectus included in the registration statement on Form S-4, 
      which Umpqua filed with the SEC in connection with the proposed 
      acquisition, because it contains important information about Umpqua, 
      North Bay, the acquisition and related matters. The directors and 
      executive officers of North Bay may be deemed to be participants in the 
      solicitation of proxies from North Bay shareholders. Information 
      regarding the participants and their security holdings can be found in 
      North Bay’s most recent proxy statements filed 
      and the proxy statement/prospectus filed with the SEC. All documents 
      filed with the SEC are available for free, both on the SEC web site (http://www.sec.gov) 
      and from Umpqua by directing a request to Umpqua Holdings Corporation, 
      Attention: Investor Relations, One SW Columbia Street, Suite 1200, 
      Portland, OR 97258, and from North Bay by directing a request to North 
      Bay Bancorp, Investor Relations, P.O. Box 2200, 1190 Airport Road, Napa, 
      CA 94558.