SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): APRIL 30, 1999 GREATER BAY BANCORP (Exact name of registrant as specified in its charter) CALIFORNIA 77-0387041 (State or other jurisdiction of (I.R.S. employer incorporation or organization) identification number) COMMISSION FILE NUMBER: 0-25034 2860 WEST BAYSHORE ROAD PALO ALTO, CALIFORNIA 94303 (Address of principal executive offices and zip code) REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (650) 813-8200 ITEM 5. OTHER EVENTS. On April 30, 1999, Greater Bay Bancorp (the "Registrant") entered into an Agreement and Plan of Reorganization with Bay Commercial Services ("BCS") providing for the merger of BCS with and into the Registrant (the "Merger"), subject to the terms and conditions therein, including the receipt of all required regulatory approvals and the approval of the shareholders of BCS. Following consummation of the Merger, Bay Bank of Commerce, a wholly owned subsidiary of BCS, will become a wholly owned subsidiary of the Registrant. ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS. Exhibits - -------- 2 Agreement and Plan of Reorganization, dated as of April 30, 1999, by and between Greater Bay Bancorp and Bay Commercial Services 99.1 Press Release dated May 3, 1999 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. GREATER BAY BANCORP (Registrant) Dated: May 4, 1999 By: /s/ Linda M. Iannone -------------------- Linda M. Iannone Senior Vice President and General Counsel EXHIBIT INDEX ------------- 2 Agreement and Plan of Reorganization, dated as of April 30, 1999, by and between Greater Bay Bancorp and Bay Commercial Services 99.1 Press Release dated May 3, 1999