UNITED STATES 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): December 27, 2004 BEACON POWER CORPORATION ------------------------ (Exact Name of Registrant as Specified in Charter) DELAWARE 001-16171 04-3372365 -------- --------- ---------- (State or Other Jurisdiction of (Commission File Number) (IRS Employer Incorporation) Identification No.) 234 BALLARDVALE STREET WILMINGTON, MA 01887 ---------------------- ----- (Address of Principal Executive Offices) (Zip Code) Registrant's telephone number, including area code: 978-694-9121 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Section 1 - Registrant's Business and Operations Item 1.01. Entry into a Material Definitive Agreement. On December 27, 2004, Beacon Power Corporation (the "Registrant") entered into an Assignment with CRT Capital Group LLC (the "Transferee") for the sale and transfer of the Amended and Restated Warrant (the "Warrant") dated as of October 18, 2004 issued by Evergreen Solar, Inc., a Delaware corporation ("Evergreen"), for shares of common stock, $.01 par value per share, of Evergreen held by the Registrant. The Registrant purchased the Warrant from Evergreen for $100,000.00. The aggregate purchase price paid by the Transferee to the Registrant for the sale and transfer of the Warrant is $1,800,000.00. Item 9. Financial Statements and Exhibits. (c) Exhibits 10.1 Assignment, dated December 27, 2004, executed by Beacon Power Corporation and accepted by CRT Capital Group LLC. 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. BEACON POWER CORPORATION Date: December 29, 2004 By: /s/ F. William Capp ------------------- Name: F. William Capp Title: President and Chief Executive Officer Exhibit Index Exhibit No. Description - ----------- ----------- 10.1 Assignment, dated December 27, 2004, executed by Beacon Power Corporation and accepted by CRT Capital Group LLC.