X0303 4 2010-08-05 1 0000026537 ARGON ST, Inc. STST 0001250606 IRVIN JOHN 1620 BLACKBURN HEIGHTS DRIVE SEWICKLEY PA 15143 1 0 0 0 Common Stock 2010-07-09 5 G 0 E 3573 0.00 D 26548 D Common Stock 2010-07-14 5 G 0 E 140 0.00 D 26408 D Common Stock 2010-08-05 4 U 0 26408 34.50 D 0 D Stock Option (Right to Buy) 7.54 2010-08-05 4 D 0 10000 34.50 D 2013-01-01 Common Stock 10000 0 D Stock Option (Right to Buy) 14.22 2010-08-05 4 D 0 5000 34.50 D 2013-12-15 Common Stock 5000 0 D Stock Option (Right to Buy) 28.10 2010-08-05 4 D 0 15000 34.50 D 2014-09-30 Common Stock 15000 0 D Stock Option (Right to Buy) 28.47 2010-08-05 4 D 0 15000 34.50 D 2015-11-21 Common Stock 15000 0 D Restricted Stock Units 2010-08-05 4 D 0 4000 34.50 D Common Stock 4000 0 D This option was cancelled in the tender offer that expired on August 4, 2010 in exchange for a cash payment of $269,600, representing the difference between the exercise price of the option and the offer price ($34.50 per share) pursuant to the Merger Agreement between the issuer and The Boeing Company. This option was cancelled in the tender offer that expired on August 4, 2010 in exchange for a cash payment of $101,400, representing the difference between the exercise price of the option and the offer price ($34.50 per share) pursuant to the Merger Agreement between the issuer and The Boeing Company. This option was cancelled in the tender offer that expired on August 4, 2010 in exchange for a cash payment of $96,000, representing the difference between the exercise price of the option and the offer price ($34.50 per share) pursuant to the Merger Agreement between the issuer and The Boeing Company. This option was cancelled in the tender offer that expired on August 4, 2010 in exchange for a cash payment of $90,450, representing the difference between the exercise price of the option and the offer price ($34.50 per share) pursuant to the Merger Agreement between the issuer and The Boeing Company. Each restricted stock unit represents a contingent right to receive one (1) share of Argon ST, Inc. common stock. These restricted stock units were cancelled in the tender offer that expired on August 4, 2010 in exchange for a cash payment of $138,000 ($34.50 per share) pursuant to the Merger Agreement between the issuer and The Boeing Company. These restricted stock units vested automatically upon consummation of the tender offer on August 4, 2010. /s/ John Irvin 2010-08-06