This excerpt taken from the AMSC 8-K filed Feb 8, 2010.
Item 8.01 Other Events.
From 2004-2008, the Compensation Committee (or the Board of Directors in the case of the Chief Executive Officer) of American Superconductor Corporation (the "Company") approved grants of performance-based restricted shares for Executive Officers that would vest upon the Company’s achievement of four consecutive quarters of GAAP profitability. This milestone was achieved for the quarter ended December 31, 2009. As a result, on February 4, 2010, these restricted shares vested. Certain Executive Officers of the Company sold a portion of these shares pursuant to pre-established Rule 10b5-1 trading plans. The primary purpose of such sales was to pay personal income taxes that were due upon vesting of the shares. These sales were made on February 4, 5 and 8, 2010 as disclosed in Form 4 filings on February 8, 2010.
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.