X0303 4 2010-05-04 0 0000030822 DYNAMICS RESEARCH CORP DRCO 0001185522 COVEL RICHARD A P.O. BOX 476 STOW MA 01775 0 1 0 0 Vice Pres. and General Counsel Common Stock 2010-05-03 4 P 0 1249 8.94 A 13990.809 D Common Stock 2010-05-04 4 M 0 9936 8.94 A 23926.809 D Common Stock 2010-05-04 4 S 0 9936 13.00 D 13990.809 D Common Stock 2010-05-04 4 M 0 38815 8.94 A 52805.809 D Common Stock 2010-05-04 4 S 0 25515 13.00 D 27290.809 D Common Stock 2010-05-04 4 S 0 300 13.01 D 26990.809 D Common Stock 2010-05-04 4 S 0 500 13.02 D 26490.809 D Common Stock 2010-05-04 4 S 0 2400 13.025 D 24090.809 D Common Stock 2010-05-04 4 S 0 400 13.03 D 23690.809 D Common Stock 2010-05-04 4 S 0 100 13.04 D 23590.809 D Common Stock 2010-05-04 4 S 0 200 13.05 D 23390.809 D Common Stock 2010-05-04 4 S 0 200 13.06 D 23190.809 D Common Stock 2010-05-04 4 S 0 100 13.065 D 23090.809 D Common Stock 2010-05-04 4 S 0 400 13.07 D 22690.809 D Common Stock 2010-05-04 4 S 0 1000 13.075 D 21690.809 D Common Stock 2010-05-04 4 S 0 200 13.08 D 21490.809 D Common Stock 2010-05-04 4 S 0 500 13.09 D 20990.809 D Common Stock 2010-05-04 4 S 0 700 13.10 D 20290.809 D Common Stock 2010-05-04 4 S 0 200 13.11 D 20090.809 D Common Stock 2010-05-04 4 S 0 200 13.115 D 19890.809 D Common Stock 2010-05-04 4 S 0 100 13.13 D 19790.809 D Common Stock 2010-05-04 4 S 0 400 13.15 D 19390.809 D Common Stock 2010-05-04 4 S 0 400 13.17 D 18990.809 D Common Stock 2010-05-04 4 S 0 300 13.175 D 18690.809 D Common Stock 2010-05-04 4 S 0 800 13.19 D 17890.809 D Common Stock 2010-05-04 4 S 0 1100 13.21 D 16790.809 D Common Stock 2010-05-04 4 S 0 600 13.215 D 16190.809 D Common Stock 2010-05-04 4 S 0 600 13.22 D 15590.809 D Common Stock 2010-05-04 4 S 0 700 13.23 D 14890.809 D Common Stock 2010-05-04 4 S 0 600 13.24 D 14290.809 D DRC Stock Option Plan 8.94 2010-05-04 4 M 0 9936 8.94 D 2008-05-31 2011-05-31 DYNAMICS RESEARCH 9936 0 D DRC Stock Option Plan 8.94 2010-05-04 4 M 0 38815 8.94 D 2008-05-31 2011-05-31 DYNAMICS RESEARCH 38815 0 D Multiple lots for the same price for this order have been combined. Richard A. Covel 2010-05-05