Below are insider transactions of 1,000 shares or more for publicly held companies based in Maryland or having substantial operations here. Insiders are officers, directors or owners of 10 percent or more of a corporation's stock.

Columbia Bancorp

Harry L. Lundy,director, indirectly sold 5,000 shares of common at $13.50 each from April 26 to April 27 and now directly and indirectly holds 105,386 common.

General Motors Corp.

Gerald A. Knechtelexercised an option for 2,556 shares of common between $53.76 and $56.00 each April 15 and now directly and indirectly holds 10,909 common.

Pub Date: 5/31/99