HII

SEC source: 0000950170-24-083233 · ownership.xml · derivative · entry 4

Boykin Jennifer R. · CIK 0001706050 · Ex VP, President NNS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,202.52

Underlying: Common Stock · 6.52 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F3 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083243 · ownership.xml · derivative · entry 4

Green Edgar A III · CIK 0001691442 · Ex VP, Pres. HII Mission Tech

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,202.52

Underlying: Common Stock · 6.52 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F3 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083295 · ownership.xml · derivative · entry 4

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 397.153

Underlying: Common Stock · 2.153 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F2 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083288 · ownership.xml · derivative · entry 3

Stiehle Thomas E. · CIK 0001846302 · Ex. VP and CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,568.505

Underlying: Common Stock · 8.505 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F2 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083282 · ownership.xml · derivative · entry 3

Soong Christopher W. · CIK 0001971852 · Ex VP & CIO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 627.402

Underlying: Common Stock · 3.402 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F2 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083275 · ownership.xml · derivative · entry 3

Schuck Nicolas G · CIK 0001651056 · Corp VP, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 444.41

Underlying: Common Stock · 2.41 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F3 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083270 · ownership.xml · derivative · entry 4

Kastner Christopher D · CIK 0001569904 · Director · Director, President & CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,799.869

Underlying: Common Stock · 36.869 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F3 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-083238 · ownership.xml · derivative · entry 3

Chewning Eric D. · CIK 0001964855 · Ex VP, Strategy & Development

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 888.819

Underlying: Common Stock · 4.818 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F2 · shares: The RSRs acquired represent dividend equivalent rights credited following payment of the Company's quarterly cash dividend. Pursuant to the LTISP, the number of RSRs acquired is calculated by dividing the aggregate amount of the dividend paid on the total number of RSRs held by the reporting person by the closing price of a share of Company common stock on the dividend payment date.

F1 · derivative.exercise_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

F1 · derivative.expiration_date: Each Restricted Stock Right ("RSR") represents a contingent right to receive an equivalent number of shares of Company common stock, or, at the discretion of the Company's Compensation Committee, cash or a combination of cash and Company common stock. The RSRs were granted under the 2022 Long-Term Incentive Stock Plan ("LTISP") on 2/26/24 and vest ratably in three equal installments upon each of the first, second and third anniversaries of the grant date.

SEC source: 0000950170-24-062672 · ownership.xml · nonDerivative · entry 1

Hughes Edmond E. Jr. · CIK 0001920500 · Ex VP & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,134.787

SEC source: 0000950170-24-062124 · ownership.xml · nonDerivative · entry 1

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,026.508

SEC source: 0000950170-24-058779 · ownership.xml · nonDerivative · entry 1

Boykin Jennifer R. · CIK 0001706050 · Ex VP, President NNS

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) plan

Disclosed balance after: 0

F1 · kind: Age 59.5 withdrawal from the Huntington Ingalls Industries, Inc. Savings Plan.

SEC source: 0000950170-24-040401 · ownership.xml · nonDerivative · entry 2

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 8,635.583

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 and 2022 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: 0000950170-24-040412 · ownership.xml · nonDerivative · entry 2

DENAULT LEO P · CIK 0001281986 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,770.909

F2 · ownership.nature: Represents vested restricted stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc.'s 2012 and 2022 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: 0000950170-24-041103 · ownership.xml · nonDerivative · entry 1

Jimenez Frank R · CIK 0001465175 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 1,851.262

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-041094 · ownership.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,467

F1 · shares: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. After the Reporting Person has accumulated a combination of restricted stock units and/or shares of common stock 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: 0000950170-24-041217 · ownership.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 6,170.624

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-041198 · ownership.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 20,819.556

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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, 2012 and 2022 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: 0000950170-24-041136 · ownership.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,215

F1 · shares: Shares of common stock issued pursuant to the Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan ("Plan"), in an exempt transaction pursuant to Rule 16b-3. After the Reporting Person has accumulated a combination of restricted stock units and/or shares of common stock 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: 0000950170-24-041177 · ownership.xml · nonDerivative · entry 1

O'Sullivan Stephanie L. · CIK 0001842003 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 2,566.22

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-041153 · ownership.xml · nonDerivative · entry 1

McKibben Tracy B · CIK 0001584119 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 4,066.242

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-041075 · ownership.xml · nonDerivative · entry 1

Faller Craig S. · CIK 0001996124 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 500.615

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Incentive Stock Plan, in an exempt transaction pursuant to Rule 16b-3.

F2 · ownership.nature: Represents stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Stock Incentive Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value).

SEC source: 0000950170-24-041057 · ownership.xml · nonDerivative · entry 1

DONALD KIRKLAND H · CIK 0001579933 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 5,245.132

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-040401 · ownership.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 8,492.583

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-040412 · ownership.xml · nonDerivative · entry 1

DENAULT LEO P · CIK 0001281986 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,627.909

F1 · shares: Shares of common stock deferred into stock unit account pursuant to Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-031595 · ownership.xml · nonDerivative · entry 1

Green Edgar A III · CIK 0001691442 · Ex VP, Pres. HII Mission Tech

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,477.451

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

SEC source: 0000950170-24-030396 · ownership.xml · nonDerivative · entry 2

Harris Paul C. · CIK 0001918481 · Ex VP & Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,146.98

SEC source: 0000950170-24-030396 · ownership.xml · nonDerivative · entry 1

Harris Paul C. · CIK 0001918481 · Ex VP & Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,149.878

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030371 · ownership.xml · nonDerivative · entry 1

Borkey Todd A. · CIK 0001948701 · Ex VP & Chief Technology Offic

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,459.392

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030408 · ownership.xml · nonDerivative · entry 2

Hughes Edmond E. Jr. · CIK 0001920500 · Ex VP & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,634.787

SEC source: 0000950170-24-030408 · ownership.xml · nonDerivative · entry 1

Hughes Edmond E. Jr. · CIK 0001920500 · Ex VP & Chief HR Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,637.746

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030406 · ownership.xml · nonDerivative · entry 2

Holmes Stewart H. · CIK 0001886377 · Ex. VP, Govt & Cust Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,156.071

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030406 · ownership.xml · nonDerivative · entry 1

Holmes Stewart H. · CIK 0001886377 · Ex. VP, Govt & Cust Relations

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,165.326

SEC source: 0000950170-24-030399 · ownership.xml · nonDerivative · entry 2

Hart Brooke · CIK 0001886264 · Ex. VP, Communications

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,011.799

SEC source: 0000950170-24-030399 · ownership.xml · nonDerivative · entry 1

Hart Brooke · CIK 0001886264 · Ex. VP, Communications

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,014.889

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030423 · ownership.xml · nonDerivative · entry 2

Wilkinson Kara R. · CIK 0001852543 · Ex. VP and President, Ingalls

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,846.307

SEC source: 0000950170-24-030423 · ownership.xml · nonDerivative · entry 1

Wilkinson Kara R. · CIK 0001852543 · Ex. VP and President, Ingalls

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,859.986

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030378 · ownership.xml · nonDerivative · entry 2

Boudreaux Chad N. · CIK 0001808160 · Ex VP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,407.397

SEC source: 0000950170-24-030378 · ownership.xml · nonDerivative · entry 1

Boudreaux Chad N. · CIK 0001808160 · Ex VP & Chief Legal Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,422.995

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030385 · ownership.xml · nonDerivative · entry 2

Boykin Jennifer R. · CIK 0001706050 · Ex VP, President NNS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,961.436

SEC source: 0000950170-24-030385 · ownership.xml · nonDerivative · entry 1

Boykin Jennifer R. · CIK 0001706050 · Ex VP, President NNS

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,980.32

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030390 · ownership.xml · nonDerivative · entry 2

Green Edgar A III · CIK 0001691442 · Ex VP, Pres. HII Mission Tech

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,483.451

SEC source: 0000950170-24-030390 · ownership.xml · nonDerivative · entry 1

Green Edgar A III · CIK 0001691442 · Ex VP, Pres. HII Mission Tech

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,501.947

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. 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: 0000950170-24-030301 · ownership.xml · nonDerivative · entry 1

Collins Augustus L · CIK 0001689175 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 8,368.583

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 and 2022 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 and 2022 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: 0000950170-24-030327 · ownership.xml · nonDerivative · entry 1

Jimenez Frank R · CIK 0001465175 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 1,708.262

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 and 2022 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 and 2022 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: 0000950170-24-030325 · ownership.xml · nonDerivative · entry 1

Harker Victoria D · CIK 0001350579 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 7,452.411

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2022 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 and 2022 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: 0000950170-24-030305 · ownership.xml · nonDerivative · entry 1

DENAULT LEO P · CIK 0001281986 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnote

Disclosed balance after: 1,497.909

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2022 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 stock units credited to the Reporting Person's account pursuant to Huntington Ingalls Industries, Inc. 2022 Long-Term Stock Incentive Plan. Each director stock unit represents a right to receive one share of Issuer common stock (or cash equivalent value).

SEC source: 0000950170-24-030366 · ownership.xml · nonDerivative · entry 1

WELCH JOHN K · CIK 0001222207 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 6,027.624

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2012 and 2022 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 and 2022 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: 0000950170-24-030358 · ownership.xml · nonDerivative · entry 1

SCHIEVELBEIN THOMAS C · CIK 0001216515 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 20,676.556

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011, 2012 and 2022 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, 2012 and 2022 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: 0000950170-24-030330 · ownership.xml · nonDerivative · entry 1

KELLY ANASTASI D · CIK 0001200231 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See footnotes

Disclosed balance after: 17,066.276

F1 · shares: Huntington Ingalls Industries, Inc. paid a cash dividend of $1.30 per share of common stock on March 8, 2024. Pursuant to the terms of the Huntington Ingalls Industries, Inc. 2011, 2012 and 2022 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, 2012 and 2022 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: 0000950170-24-030433 · ownership.xml · nonDerivative · entry 2

Wyatt D R · CIK 0001516245 · Corp VP & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,326.508