Sec Form 4 Filing - Murphy Daniel J JR @ ALLIANT TECHSYSTEMS INC - 2009-05-19

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 Murphy Daniel J JR 2. Issuer Name and Ticker or Trading Symbol ALLIANT TECHSYSTEMS INC [ ATK] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chairman and CEO (Last) (First) (Middle) 7480 FLYING CLOUD DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 05/19/2009 (Street) MINNEAPOLIS, MN55344-3720 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 05/19/2009 A( 1 ) 725 A $ 0 29,495 ( 2 ) D Common Stock 05/19/2009 F( 1 ) 725 D $ 85.63 28,770 ( 2 ) D Common Stock 236 ( 2 ) I By 401(k) Plan

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 Deferred Stock Unit ( 3 ) 05/19/2009 A 49,275 ( 3 ) ( 3 ) Common Stock 49,275 $ 0 49,275 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Murphy Daniel J JR 7480 FLYING CLOUD DRIVE MINNEAPOLIS, MN55344-3720 X Chairman and CEO Signatures /s/Daniel J. Murphy 05/20/2009 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares simultaneously acquired and disposed represent shares withheld to pay Medicare taxes in connection with the payment of a Performance Share Award and the reporting person's deferral of the remaining performance shares under the Issuer's Nonqualified Deferred Compensation Plan (NQDCP) (reported in Table II of this Form). ( 2 )Since the reporting person's last ownership report, he transferred 28,769 shares of common stock that he held directly and 237 shares of common stock that he held in the ATK Stock Fund of the Issuer's 401(k) plan, pursuant to a qualified domestic relations order. The reporting person no longer reports as beneficially owned any of the transferred securities. ( 3 )The Deferred Stock Units were credited to the reporting person's account under the Issuer's NQDCP in lieu of a payment by the Issuer of performance shares under the Issuer's 2005 Stock Incentive Plan. The number of units credited to the reporting person's account was determined on a 1-for-1 basis equal to the number of shares of common stock that would have been paid, reduced by the number of shares having a value equal to the Issuer's Medicare tax withholding obligation as a result of the deferral of the payment of the shares. The units will be settled 100% in shares of the Issuer's common stock following the reporting person's termination of employment or such other date specified by the reporting person under the terms of the NQDCP.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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