1 SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 DATE OF REPORT (DATE OF EARLIEST EVENT REPORTED): JANUARY 18, 2000 MERCURY COMPUTER SYSTEMS, INC. (Exact name of registrant as specified in its charter) MASSACHUSETTS 0-23599 04-2741391 (State or other jurisdiction of (Commission file (IRS employer incorporation or organization) number) identification number) 199 RIVERNECK ROAD CHELMSFORD, MA 01824 (Address of principal executive offices) 978-256-1300 (Registrant's telephone number, including area code) 1 2 ITEM 5. OTHER EVENTS This amendment is being filed to include the signature page which was inadvertently omitted from the original February 2, 2000 form 8-K filing. 3 MERCURY COMPUTER SYSTEMS, INC. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. MERCURY COMPUTER SYSTEMS, INC. Date: February 2, 2000 By: /s/ G. MEAD WYMAN -------------------------------------- G. Mead Wyman Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer) 2 4 MERCURY COMPUTER SYSTEMS, INC. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this amendment to this report to be signed on its behalf by the undersigned hereunto duly authorized. MERCURY COMPUTER SYSTEMS, INC. Date: June 2, 2000 By: /s/ G. MEAD WYMAN ------------------------------------------- G. Mead Wyman Senior Vice President, Chief Financial Officer and Treasurer (Principal Financial and Accounting Officer) 3