X0303 4 2011-04-29 0 0001133421 NORTHROP GRUMMAN CORP /DE/ NOC 0001316632 LIVANOS ALEXANDER C 1840 CENTURY PARK EAST LOS ANGELES CA 90067 0 1 0 0 Corp VP & Chf Tech Officer Common Stock 2011-04-29 4 M 0 3828 47.99 A 71283 D Common Stock 2011-04-29 4 S 0 3828 62.57 D 67455 D Common Stock 2011-04-29 4 M 0 4375 48.55 A 71830 D Common Stock 2011-04-29 4 S 0 4375 62.57 D 67455 D Common Stock 2011-04-29 4 M 0 51040 41.14 A 118495 D Common Stock 2011-04-29 4 S 0 51040 62.69 D 67455 D Stock Option (Right-to-Buy) 47.99 2011-04-29 4 M 0 3828 47.99 D 2005-06-14 2014-06-14 Common Stock 3828 0 D Stock Option (Right-to-Buy) 48.55 2011-04-29 4 M 0 4375 48.55 D 2006-02-07 2015-02-07 Common Stock 4375 0 D Stock Option (Right-to-Buy) 41.14 2011-04-29 4 M 0 51040 41.14 D 2010-02-17 2016-02-17 Common Stock 51040 25523 D Total amount includes 13,343 unvested Restricted Performance Stock Rights ("RPSRs") granted under the 2001 Long-Term Incentive Stock Plan ("LTISP") on 2/17/09, with a valuation of performance measurement period ("measurement period") ending on 12/31/11; 14,109 unvested RPSRs granted under the LTISP on 2/16/10, with the measurement period ending on 12/31/12; 6,741 unvested RPSRs granted under the LTISP on 2/15/11 with the measurement period ending on 12/31/13; and 6,741 Restricted Stock Rights granted under the LTISP on 2/15/11 and cliff vests 100% on the fourth anniversary from the grant date on 2/15/15. Grants awarded pursuant to Rule 16b-3(d). Represents the weighted average sale price of $62.69 rounded to the nearest hundredths. The highest prince at which the shares sold was $62.770 and the lowest price at which the shares sold was $62.57. /s/ Kathleen M. Salmas, Attorney-in-Fact for Alexander C. Livanos 2011-05-02