EXHIBIT 99.1 FOR IMMEDIATE RELEASE BANK CONTACT: PAUL A. MILLER (978) 725-7555 LSB CORPORATION DECLARES CASH DIVIDEND DIVIDEND YIELD 3.64% NORTH ANDOVER, Mass. -- (BUSINESS WIRE) - April 25, 2003 -- LSB Corporation, (NASDAQ - LSBX), today announced the Board of Directors of LSB Corporation declared a dividend to shareholders on April 24, 2003. The Board voted to pay a cash dividend of $0.12 per share on its outstanding shares of common stock payable on May 22, 2003 to shareholders of record at the close of business on May 8, 2003. This represents a 3.64% dividend yield based on the stock price at the close of business on April 24, 2003. LSB Corporation is the parent holding company of its wholly-owned subsidiary Lawrence Savings Bank located in North Andover, Massachusetts, an Equal Housing Lender and Member, FDIC/Depositors Insurance Fund. 5