================================================================================ SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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): January 13, 2004 Aether Systems, Inc. (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER) Delaware 000-27707 52-2186634 (State or other jurisdiction of (Commission File Number) (IRS Employer incorporation) Identification No.) 11460 Cronridge Drive Owings Mills, Maryland 21117 (Address of Principal Executive Offices, including Zip Code) (410) 654-6400 (Registrant's Telephone Number, Including Area Code) ================================================================================ On January 13, 2004, Aether System Inc. completed the sale of its Enterprise Mobility Solutions division to TeleCommunication Systems, Inc. A copy of the press release announcing the closing of the transaction is furnished as Exhibit 99.1. Item 7. Financial Statements, Pro Forma Financial Information and Exhibits. (c) Exhibits 99.1: Press Release of Aether Systems, Inc., dated January 13, 2004. SIGNATURES According 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 on the date set forth below. AETHER SYSTEMS, INC. /s/ David C. Reymann ----------------------------- Date: January 14, 2004 By: David C. Reymann Its: Chief Financial Officer 2