HII

SEC source: 0001209191-17-048980 · doc4.xml · nonDerivative · entry 2

ERMATINGER WILLIAM R · CIK 0001515127 · Ex. VP, Chief HR Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,385

F2 · price: The price shown is the weighted average price at which shares were sold in multiple sales transactions made pursuant to a single market order. The range of prices for the transactions was $215.73 to $215.84. Upon request by SEC staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0001209191-17-048980 · doc4.xml · nonDerivative · entry 1

ERMATINGER WILLIAM R · CIK 0001515127 · Ex. VP, Chief HR Officer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 32,810

F1 · price: The price shown is the weighted average price at which shares were sold in multiple sales transactions made pursuant to a single market order. The range of prices for the transactions was $214.66 to $215.38. Upon request by SEC staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0001209191-17-048694 · doc4.xml · nonDerivative · entry 1

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 19,865

SEC source: 0001209191-17-045223 · doc4.xml · nonDerivative · entry 1

Boykin Jennifer R. · CIK 0001706050 · Vice President, Engineering

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,425

SEC source: 0001209191-17-043925 · doc4.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 386.166

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-043934 · doc4.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 385

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-043946 · doc4.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,736.903

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-043941 · doc4.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,345.633

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-043939 · doc4.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 385

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-043929 · doc4.xml · nonDerivative · entry 1

FARGO THOMAS B · CIK 0001317283 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 695

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-043949 · doc4.xml · nonDerivative · entry 1

Wilson Stephen R · CIK 0001362352 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 1,088.169

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-044075 · doc4.xml · nonDerivative · entry 2

Dickseski Jerri F · CIK 0001516246 · EX. VP, Communications

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 33,883

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2016.

SEC source: 0001209191-17-043927 · doc4.xml · nonDerivative · entry 1

DONALD KIRKLAND H · CIK 0001579933 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 386.166

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039101 · doc4.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 256.166

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039087 · doc4.xml · nonDerivative · entry 1

Smith Michael Stephen · CIK 0001668870 · Ex. VP, Strategy & Dev.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,273.978

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

SEC source: 0001209191-17-039109 · doc4.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 5,199.5955

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039115 · doc4.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,606.903

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011 and 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039113 · doc4.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,215.633

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011 and 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039111 · doc4.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 14,959.467

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011 and 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039095 · doc4.xml · nonDerivative · entry 1

FARGO THOMAS B · CIK 0001317283 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,916.937

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011 and 2012 Long-Term Incentive Stock Plans, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039117 · doc4.xml · nonDerivative · entry 1

Wilson Stephen R · CIK 0001362352 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 958.169

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-039107 · doc4.xml · nonDerivative · entry 1

DONALD KIRKLAND H · CIK 0001579933 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 256.166

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on June 9, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-035974 · doc4.xml · nonDerivative · entry 1

Kastner Christopher D · CIK 0001569904 · Ex. VP, Bus Dev & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,464

F1 · shares: This acquisition was executed to correct a transaction executed on May 4, 2017, and as reported on a Form 4 filed on May 5, 2017, due to broker error. The purchase was made at the original price as sold on May 4, 2017.

F1 · price: This acquisition was executed to correct a transaction executed on May 4, 2017, and as reported on a Form 4 filed on May 5, 2017, due to broker error. The purchase was made at the original price as sold on May 4, 2017.

SEC source: 0001209191-17-033493 · doc4.xml · nonDerivative · entry 2

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,665

F1 · kind: This transaction represents a gift to a 501(c)(3) charitible foundation by the reporting person.

SEC source: 0001209191-17-033493 · doc4.xml · nonDerivative · entry 1

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 20,740

SEC source: 0001209191-17-030349 · doc4.xml · nonDerivative · entry 2

Kastner Christopher D · CIK 0001569904 · Ex. VP, Bus Dev & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 35,281

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2017.

F3 · price: The price shown is the weighted average price at which shares were sold in multiple sales transactions made pursuant to a single market order. The range of prices for the transactions made was $189.40 to $190.00. Upon request by SEC staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0001209191-17-030349 · doc4.xml · nonDerivative · entry 1

Kastner Christopher D · CIK 0001569904 · Ex. VP, Bus Dev & CFO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 39,581

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 24, 2017.

F2 · price: The price shown is the weighted average price at which shares were sold in multiple sales transactions made pursuant to a single market order. The range of prices for the transactions made was $189.40 to $189.95. Upon request by SEC staff, the issuer or a security holder of the issuer, the reporting person will provide full information regarding the number of shares sold at each separate price.

SEC source: 0001209191-17-025118 · doc4.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 255.374

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-025096 · doc4.xml · nonDerivative · entry 1

Smith Michael Stephen · CIK 0001668870 · Ex. VP, Strategy & Dev.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,272.423

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 3, 2017.

SEC source: 0001209191-17-025180 · doc4.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 255

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-025212 · doc4.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,601.935

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-025207 · doc4.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,168.592

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-025189 · doc4.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 255

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-025158 · doc4.xml · nonDerivative · entry 1

FARGO THOMAS B · CIK 0001317283 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 565

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-025222 · doc4.xml · nonDerivative · entry 1

Wilson Stephen R · CIK 0001362352 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 955.207

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-025202 · doc4.xml · nonDerivative · entry 1

Miller Paul D. · CIK 0001516073 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 255

F1 · kind: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. In accordance with the Plan, after the Reporting Person has received restricted stock units equal to at least five times the cash portion of their annual retainer. The Reporting Person may elect annually to receive and directly own common stock, rather than receiving a credit for restricted stock units.

SEC source: 0001209191-17-025173 · doc4.xml · nonDerivative · entry 1

DONALD KIRKLAND H · CIK 0001579933 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 255.374

F1 · kind: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-044090 · doc4.xml · nonDerivative · entry 2

Green Edgar A III · CIK 0001691442 · Ex VP, Pres. HII Technical Sol

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 6,903

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 21, 2016.

SEC source: 0001209191-17-044075 · doc4.xml · nonDerivative · entry 1

Dickseski Jerri F · CIK 0001516246 · EX. VP, Communications

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,659

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 23, 2016.

SEC source: 0001209191-17-022922 · doc4.xml · nonDerivative · entry 1

Cuccias Brian J. · CIK 0001594313 · Ex. VP & President, Ingalls

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,819

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on February 22, 2017.

SEC source: 0001209191-17-020491 · doc4.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 132.374

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020486 · doc4.xml · nonDerivative · entry 1

Smith Michael Stephen · CIK 0001668870 · Ex. VP, Strategy & Dev.

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,414.423

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

SEC source: 0001209191-17-020529 · doc4.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 5,183.5185

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020562 · doc4.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See Footnote

Disclosed balance after: 1,478.935

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020549 · doc4.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,045.592

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020537 · doc4.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 14,913.218

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020512 · doc4.xml · nonDerivative · entry 1

FARGO THOMAS B · CIK 0001317283 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 15,867.727

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · balance_after: 978 shares were previously reported as directly held and are now being reported as indirectly held through the Thomas B. Fargo Trust.

F3 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020567 · doc4.xml · nonDerivative · entry 1

Wilson Stephen R · CIK 0001362352 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnotes

Disclosed balance after: 832.207

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020542 · doc4.xml · nonDerivative · entry 1

Miller Paul D. · CIK 0001516073 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 14,913.218

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2011 and 2012 Long-Term Incentive Stock Plans. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.

SEC source: 0001209191-17-020500 · doc4.xml · nonDerivative · entry 1

DONALD KIRKLAND H · CIK 0001579933 · Director

10b5-1 filing: Not disclosed

Ownership: Indirect · See footnote

Disclosed balance after: 132.374

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $0.60 per share of common stock on March 10, 2017. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 Long-Term Incentive Stock Plan, shares of common stock representing the dividend were deferred into a stock unit account in a transaction exempt by Rule 16b-3.

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 Long-Term Incentive Stock Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value), which will generally become payable within 30 days following the date a non-employee director ceases to provide services as a member of the board of directors.