LDOS

SEC source: 0001336920-26-000033 · wk-form4_1771365492.xml · nonDerivative · entry 1

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 53,373

F1 · shares: This restricted stock unit award will vest over three annual installments, beginning on March 7, 2026.

SEC source: 0001336920-26-000025 · wk-form4_1769118762.xml · nonDerivative · entry 1

Porter Elizabeth A · CIK 0001820381 · Sector President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 38,575

F1 · kind: This transaction was executed pursuant to a trading plan entered into by the reporting person on September 12, 2025, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $192.17 to $192.36 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001336920-26-000018 · wk-form4_1767994182.xml · nonDerivative · entry 1

KRAEMER HARRY M JANSEN JR · CIK 0001082877 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 128,811.1423

F1 · shares: The reporting person elected to defer receipt of these shares, which represent a quarterly payment of their retainer for service on the company's Board of Directors, under the terms of the Leidos Holdings, Inc. Key Executive Stock Deferral Plan.

SEC source: 0001336920-26-000012 · wk-form4_1767392073.xml · nonDerivative · entry 1

KRAEMER HARRY M JANSEN JR · CIK 0001082877 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 128,639.4827

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-26-000015 · wk-form4_1767392303.xml · nonDerivative · entry 1

SHAPARD ROBERT S · CIK 0001121300 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Key Executive Stock Deferral Plan

Disclosed balance after: 1,620.4763

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-26-000003 · wk-form4_1767391390.xml · nonDerivative · entry 1

Antal Daniel J. · CIK 0002016615 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 5,009.4423

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-26-000009 · wk-form4_1767391885.xml · nonDerivative · entry 1

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 1,792.5419

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-26-000006 · wk-form4_1767391676.xml · nonDerivative · entry 1

Cage Christopher R · CIK 0001779866 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 29,401.5352

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-25-000071 · wk-form4_1766439105.xml · nonDerivative · entry 2

Porter Elizabeth A · CIK 0001820381 · Sector President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 41,575

F1 · kind: This transaction was executed pursuant to a trading plan entered into by the reporting person on September 12, 2025, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

F3 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $181.29 to $181.99 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001336920-25-000071 · wk-form4_1766439105.xml · nonDerivative · entry 1

Porter Elizabeth A · CIK 0001820381 · Sector President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 42,272

F1 · kind: This transaction was executed pursuant to a trading plan entered into by the reporting person on September 12, 2025, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $180.29 to $181.2115 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001336920-25-000068 · wk-form4_1764798077.xml · nonDerivative · entry 1

Schmanske Mary Vicki · CIK 0001755309 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 67,787

SEC source: 0001336920-25-000066 · wk-form4_1763587816.xml · nonDerivative · entry 1

Carlini James F. · CIK 0001926985 · EVP, Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,169

SEC source: 0001336920-25-000064 · wk-form4_1763506807.xml · nonDerivative · entry 1

Schmanske Mary Vicki · CIK 0001755309 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,097

F1 · kind: These shares were withheld by the Company to satisfy the reporting person's tax obligation associated with previously reported awards of restricted stock units. This share withholding was authorized in the restricted stock award agreement.

SEC source: 0001336920-25-000062 · wk-form4_1763506596.xml · nonDerivative · entry 1

Carlini James F. · CIK 0001926985 · EVP, Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,222

F1 · kind: These shares were withheld by the Company to satisfy the reporting person's tax obligation associated with previously reported awards of restricted stock units. This share withholding was authorized in the restricted stock award agreement.

SEC source: 0001336920-25-000052 · wk-form4_1760041971.xml · nonDerivative · entry 1

KRAEMER HARRY M JANSEN JR · CIK 0001082877 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 128,334.466

F1 · shares: The reporting person elected to defer receipt of these shares, which represent a quarterly payment of their retainer for service on the company's Board of Directors, under the terms of the Leidos Holdings, Inc. Key Executive Stock Deferral Plan.

SEC source: 0001336920-25-000050 · wk-form4_1759438216.xml · nonDerivative · entry 1

KRAEMER HARRY M JANSEN JR · CIK 0001082877 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 128,169.4914

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-25-000048 · wk-form4_1759438031.xml · nonDerivative · entry 1

SHAPARD ROBERT S · CIK 0001121300 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · by Key Executive Stock Deferral Plan

Disclosed balance after: 1,616.6848

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-25-000041 · wk-form4_1759437218.xml · nonDerivative · entry 1

Antal Daniel J. · CIK 0002016615 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 5,008.4632

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-25-000045 · wk-form4_1759437590.xml · nonDerivative · entry 1

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 1,788.2892

F1 · shares: Dividend equivalent rights.

SEC source: 0001336920-25-000043 · wk-form4_1759437380.xml · nonDerivative · entry 1

Cage Christopher R · CIK 0001779866 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Indirect · By Key Executive Stock Deferral Plan

Disclosed balance after: 29,342.6634

F1 · shares: Dividend equivalent rights.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · derivative · entry 10

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,485

Underlying: Common Stock · 2,827 shares

Expires 2031-03-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 6

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,816.9809

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $177.64 to $178.545 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 5

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,313.9809

F1 · kind: Represents shares of common stock withheld by the issuer in connection with the option exercise to cover the exercise price and associated fees.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 4

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,722.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · derivative · entry 9

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,816

Underlying: Common Stock · 3,690 shares

Expires 2030-03-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · derivative · entry 8

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,191

Underlying: Common Stock · 3,572 shares

Expires 2029-03-03

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · derivative · entry 7

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 4,264 shares

Expires 2028-03-04

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · balance_after: This filing corrects a clerical error on the reporting person's Form 4 filed on August 19, 2025. On that Form 4, a stock option exercise of 1,421 options was timely and correctly reported. However, the amount shown in Column 9 was inadvertently stated as 2,843. The correct amount for Column 9 on that date was 4,264.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 3

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,895.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 2

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,205.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0002002273-25-000004 · wk-form4_1757020705.xml · nonDerivative · entry 1

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,633.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-041406 · wk-form4_1756499740.xml · derivative · entry 4

Geer Noel B · CIK 0001216858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 3,345 shares

Expires 2026-05-09

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-041406 · wk-form4_1756499740.xml · nonDerivative · entry 1

Geer Noel B · CIK 0001216858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,018.8435

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: This filing corrects an administrative error in the Form 4 filed on behalf of the Reporting Person on November 8, 2023. In that report, a sale of 2,106 shares of common stock that took place on November 6, 2023, was timely reported but was inadvertently attributed to the Reporting Person's indirect ownership via a Family Trust. In fact, these shares were sold directly by the Reporting Person. Accordingly, the post-transaction balances in Column 5 have been adjusted by increasing the shares held indirectly by the Family Trust by 2,106 and decreasing the shares held directly by the same amount to reflect the correct holdings.

SEC source: 0001755314-25-000002 · wk-form4_1756325708.xml · derivative · entry 5

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,536 shares

Expires 2026-03-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001755314-25-000002 · wk-form4_1756325708.xml · nonDerivative · entry 3

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 49,934

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $181.4805 to $181.815 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001755314-25-000002 · wk-form4_1756325708.xml · nonDerivative · entry 2

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 52,650

F1 · kind: Represents shares of common stock withheld by the issuer in connection with the option exercise to cover the exercise price and associated fees.

SEC source: 0001755314-25-000002 · wk-form4_1756325708.xml · nonDerivative · entry 1

Stevens Roy E · CIK 0001755314 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 57,470

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-041021 · wk-form4_1755893363.xml · nonDerivative · entry 1

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,369.9809

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $178.03 to $178.69 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · derivative · entry 6

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,843

Underlying: Common Stock · 1,421 shares

Expires 2028-03-04

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · derivative · entry 5

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,387 shares

Expires 2027-03-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · derivative · entry 4

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,971 shares

Expires 2026-03-07

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · nonDerivative · entry 3

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,259.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · nonDerivative · entry 2

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,838.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040821 · wk-form4_1755635407.xml · nonDerivative · entry 1

Hull Stephen Edward · CIK 0002002273 · Sector President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,451.9809

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040243 · wk-form4_1755122086.xml · nonDerivative · entry 1

May Gary Stephen · CIK 0001635110 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,137

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $177.87 to $178.16 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · derivative · entry 6

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,179

Underlying: Common Stock · 1,179 shares

Expires 2031-05-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · derivative · entry 5

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,769 shares

Expires 2029-05-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · nonDerivative · entry 4

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,068

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices from $177.40 to $177.45 inclusive. The reporting person undertakes to providing to Leidos Holdings, Inc., any security holder of Leidos Holdings, Inc., or the staff of the Securities Exchange Commission upon request, full information regarding the number of shares sold at each separate price within the aforementioned range.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · nonDerivative · entry 3

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,020

F1 · kind: Represents shares of common stock withheld by the issuer in connection with the option exercise to cover the exercise price and associated fees.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · nonDerivative · entry 2

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,016

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001628280-25-040240 · wk-form4_1755121809.xml · nonDerivative · entry 1

Dahlberg Gregory R · CIK 0001682434 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,837

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.