4 2003-06-16 0 0001093691 PLUG POWER INC PLUG 0000064463 MECHANICAL TECHNOLOGY INC 0 0 1 0 Plug Power Inc. - Common Stock 2003-06-16 4 S 0 5364 5.18 D 7142863 D Plug Power Inc. - Common Stock 2003-06-17 4 S 0 5000 5.22 D 7137863 D Plug Power Inc. - Common Stock 2003-06-18 4 S 0 5000 5.13 D 7132863 D Plug Power Inc. - Common Stock 2003-06-19 4 S 0 5000 5.09 D 7127863 D Plug Power Inc. - Common Stock 2003-06-20 4 S 0 6636 5.08 D 7121227 D Mechanical Technology Inc. 2003-06-23