================================================================================ 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): December 19, 2003 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, MD 21117 (Address of Principal Executive Offices, including Zip Code) (410) 654-6400 (Registrant's Telephone Number, Including Area Code) ================================================================================ Item 5. Other Events On December 19, 2003, Aether System Inc. signed a definitive agreement to sell its Enterprise Mobility Solutions division to TeleCommunication Systems, Inc. (TCS) (Nasdaq: TSYS). A copy of the press release announcing the transaction is furnished as exhibit 99.1 Item 7. Financial Statements and Exhibits. (c) Exhibits 99.1: Press Release of Aether Systems, Inc., dated December 19, 2003. 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, thereunto duly authorized on August 31, 2001. AETHER SYSTEMS, INC. ___________________________ Date: December 19, 2003 By: David C. Reymann Its: Chief Financial Officer