Company Name Closing Price (10/8)% Change

For the Week52-Week High 52-Week Low ExchangePublicly traded companies headquartered in Howard CountyBroadwing Corp. (Corvis)*7.95N/AN/AN/A NasdaqColumbia Bancorp29.13-2.732.8626.50 NasdaqCorporate Office Properties26.641.527.0918.56 NYSEDuratek Inc.17.48- NasdaqEssex Corp.12.16-2.313.247.15 NasdaqGSE Systems Inc.2.35-4.12.841.35 AMEXMartek Biosciences Corp.48.502.073.3643.21 NasdaqMicros Systems Inc.48.96-5.352.2434.36 NasdaqRouse Co.67.250.667.3139.88 NYSEW.R. Grace9.34-4.710.142.05 NYSEPublicly traded companies with operations in Howard CountyArbitron Inc.37.06-0.245.9031.29 NYSECiena Corp. NasdaqOrbital Sciences Corp.11.23- NYSERyland Group87.33-5.794.6068.80 NYSESandy Spring Bancorp34.151.841.4930.76 Nasdaq *As of Friday, Corvis Corp. changed its name to Broadwing Corp. after acquiring Broadwing Communications and Focal Communications. Broadwing Corp. will become the holding company for Broadwing Communications LLC, a service provider division based in Austin, and will be publicly traded on Nasdaq. The company will continue to operate its advanced optical communications equipment business based in Columbia under the Corvis name.