Insider transactions of 1,000 shares or more for public...

INSIDER TRADING

March 05, 2002

Insider transactions of 1,000 shares or more for public companies based in Maryland or with operations here.

Columbia Bancorp

Lawrence A. Shulman, director, purchased 2,000 shares of common at $18.40 each Feb. 4 and now directly holds 10,899.

Florida Rock Industries

Charles H. Denny, director, sold 17,500 shares of common for $36.75 to $36.88 each from Jan. 4 to Jan. 7, and now directly and indirectly holds 312,275.

Martek Biosciences Corp.

Richard J. Radmer, officer, sold 25,000 shares of common at $27.65 each Jan. 11 and now directly and indirectly holds 550,000.

Insider Trading is compiled by Thomson Financial/First Call.

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