X0303 4 2010-05-03 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 2010-04-30 4 P 0 84.454 13.59 A 14090.809 D Common Stock 2010-05-03 4 M 0 20000.000 8.25 A 34090.809 D Common Stock 2010-05-03 4 S 0 100 13.55 D 33990.809 D Common Stock 2010-05-03 4 S 0 100 13.56 D 33890.809 D Common Stock 2010-05-03 4 S 0 114 13.58 D 33776.809 D Common Stock 2010-05-03 4 S 0 200 13.59 D 33576.809 D Common Stock 2010-05-03 4 S 0 586 13.60 D 32990.809 D Common Stock 2010-05-03 4 S 0 600 13.61 D 32390.809 D Common Stock 2010-05-03 4 S 0 400 13.62 D 31990.809 D Common Stock 2010-05-03 4 S 0 592 13.63 D 31398.809 D Common Stock 2010-05-03 4 S 0 700 13.64 D 30698.809 D Common Stock 2010-05-03 4 S 0 1300 13.65 D 29398.809 D Common Stock 2010-05-03 4 S 0 200 13.66 D 29198.809 D Common Stock 2010-05-03 4 S 0 500 13.67 D 28698.809 D Common Stock 2010-05-03 4 S 0 600 13.68 D 28098.809 D Common Stock 2010-05-03 4 S 0 300 13.69 D 27798.809 D Common Stock 2010-05-03 4 S 0 1600 13.70 D 26198.809 D Common Stock 2010-05-03 4 S 0 1100 13.71 D 25098.809 D Common Stock 2010-05-03 4 S 0 800 13.72 D 24298.809 D Common Stock 2010-05-03 4 S 0 500 13.73 D 23798.809 D Common Stock 2010-05-03 4 S 0 200 13.74 D 23598.809 D Common Stock 2010-05-03 4 S 0 100 13.75 D 23498.809 D Common Stock 2010-05-03 4 S 0 600 13.76 D 22898.809 D Common Stock 2010-05-03 4 S 0 300 13.77 D 22598.809 D Common Stock 2010-05-03 4 S 0 305 13.80 D 22293.809 D Common Stock 2010-05-03 4 S 0 100 13.81 D 22193.809 D Common Stock 2010-05-03 4 S 0 100 13.82 D 22093.809 D Common Stock 2010-05-03 4 S 0 300 13.83 D 21793.809 D Common Stock 2010-05-03 4 S 0 100 13.84 D 21693.809 D Common Stock 2010-05-03 4 S 0 400 13.86 D 21293.809 D DRC Stock Option Plans 8.25 2010-05-03 4 M 0 20000.000 8.25 D 2010-12-12 DYNAMICS RESEARCH 20000 0 D DRC Stock Option Plans 8.94 2010-05-03 4 M 0 1249 8.94 D 2008-05-31 2011-05-31 DYNAMICS RESEARCH 1249 9936 D ESPP quarterly purchase on 4/30/2010. Grant has graded vesting schedule. Date Exercisable will vary for each vesting tranche. Multiple lots for the same price for this order have been combined. Richard A. Covel 2010-05-04