Sec Form 4 Filing - BUSH WESLEY G @ NORTHROP GRUMMAN CORP /DE/ - 2019-02-19

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person BUSH WESLEY G 2. Issuer Name and Ticker or Trading Symbol NORTHROP GRUMMAN CORP /DE/ [ NOC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chairman (Last) (First) (Middle) 2980 FAIRVIEW PARK DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 02/19/2019 (Street) FALLS CHURCH, VA22042 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 02/19/2019( 1 ) M 16,478 ( 2 ) A $ 0 39,937.4 D Common Stock 02/19/2019( 1 ) F 7,311 ( 3 ) D $ 287.35 32,626.4 D Common Stock 02/20/2019 S 11,500 D $ 287.57 ( 4 ) 21,126.4 D Common Stock 02/20/2019 S 760 D $ 286.94 ( 5 ) 54,791.25 I Held in Bush Trust No. 4 Common Stock 02/20/2019 S 18,882 D $ 287.11 ( 6 ) 35,909.25 I Held in Bush Trust No. 4 Common Stock 02/20/2019 S 1,800 D $ 286.77 ( 7 ) 53,749.25 I Held in Wesley G. Bush Rev. Trust Common Stock 02/20/2019 S 2,796 D $ 288.22 ( 8 ) 50,953.25 I Held in Wesley G. Bush Rev. Trust Common Stock 02/20/2019 S 18,864 D $ 287.42 ( 9 ) 32,089.25 I Held in Wesley G. Bush Rev. Trust Common Stock 02/20/2019 S 2,600 D $ 286.82 ( 10 ) 236,459 I Held in WG&NF Bush Family Trust Common Stock 02/20/2019 S 29,298 D $ 287.19 ( 11 ) 207,161 I Held in WG&NF Bush Family Trust Common Stock 5,636.626 I Held in Northrop Grumman Savings & Investment Plan ( 12 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Rights ( 13 ) 02/19/2019 M 16,478 ( 2 ) ( 13 ) ( 2 ) Common Stock 16,478 $ 0 21,789 ( 14 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other BUSH WESLEY G 2980 FAIRVIEW PARK DRIVE FALLS CHURCH, VA22042 X Chairman Signatures /s/ Jennifer C. McGarey, Attorney-in-Fact 02/21/2019 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In accordance with the terms of the 2011 Long-Term Incentive Stock Plan ("LTISP"), because the third anniversary of the grant (February 17, 2019) fell on a weekend, the award shares vested on February 19, 2019, the next business day. The vested award shares were valued based on the Company's closing stock price on February 19, 2019. The shares will be distributed into the participant's account on February 20, 2019. ( 2 )Shares issued upon vesting of Restricted Stock Rights ("RSRs") granted under the LTISP on 2/17/16 that vested on 2/19/19. ( 3 )Shares surrendered to issuer in payment of tax liability in connection with vesting of RSRs in accordance with Rule 16b-3(e). ( 4 )Represents the weighted average sale price of $287.57 rounded to the nearest hundredth. The highest price at which the shares were sold was $287.61 and the lowest price at which the shares were sold was $287.53. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 5 )Represents the weighted average sale price of $286.94 rounded to the nearest hundredth. The highest price at which the shares were sold was $286.995 and the lowest price at which the shares were sold was $286.78. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 6 )Represents the weighted average sale price of $287.11 rounded to the nearest hundredth. The highest price at which the shares were sold was $287.50 and the lowest price at which the shares were sold was $287.005. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 7 )Represents the weighted average sale price of $286.77 rounded to the nearest hundredth. The highest price at which the shares were sold was $286.995 and the lowest price at which the shares were sold was $286.53. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 8 )Represents the weighted average sale price of $288.22 rounded to the nearest hundredth. The highest price at which the shares were sold was $288.36 and the lowest price at which the shares were sold was $288.05. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 9 )Represents the weighted average sale price of $287.42 rounded to the nearest hundredth. The highest price at which the shares were sold was $287.97 and the lowest price at which the shares were sold was $287.020. The reporting person undertakes to provide to the Issuer, any securit y holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 10 )Represents the weighted average sale price of $286.82 rounded to the nearest hundredth. The highest price at which the shares were sold was $286.995 and the lowest price at which the shares were sold was $286.48. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 11 )Represents the weighted average sale price of $287.19 rounded to the nearest hundredth. The highest price at which the shares were sold was $287.99 and the lowest price at which the shares were sold was $287.00. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote in this Form 4. ( 12 )Held in the Northrop Grumman Savings and Investment Plan (the "Plan"), a qualified profit sharing plan, as of February 19, 2019. Share totals with respect to the Plan are based upon unit accounting and therefore may reflect a change in units attributable to an individual though no acquisition or disposition occurred. ( 13 )Each RSR represents a contingent right to receive an equivalent number of shares of Issuer common stock, or, at the election of the Issuer's Compensation Committee, cash or a combination of cash and Issuer common stock. ( 14 )Total amount includes 9,033 RSRs granted under the LTISP on 2/13/18 that will vest on 2/13/21; and 12,756 RSRs granted under the LTISP on 2/17/17 that will vest on 2/17/20.

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