CTRI

SEC source: 0001981599-26-000127 · wk-form4_1790003524.xml · nonDerivative · entry 1

DeMaria Dustin · CIK 0002016650 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,936

F1 · shares: The shares were purchased in an open market transaction.

SEC source: 0001981599-26-000118 · wk-form4_1786573253.xml · nonDerivative · entry 1

Youngblood Kelly · CIK 0001673745 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 72,864

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000117 · wk-form4_1786573203.xml · nonDerivative · entry 2

Hunter Danielle E. · CIK 0001677619 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,804

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (together, the "2026 RSU Grants"). Each RSU subject to the 2026 RSU Grants is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000117 · wk-form4_1786573203.xml · nonDerivative · entry 1

Hunter Danielle E. · CIK 0001677619 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,967

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (together, the "2026 RSU Grants"). Each RSU subject to the 2026 RSU Grants is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000122 · wk-form4a_1787188022.xml · nonDerivative · entry 1

Youngblood Kelly · CIK 0001673745 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,401

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · shares: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for the grant reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

F2 · balance_after: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for the grant reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

SEC source: 0001981599-26-000124 · wk-form4a_1787188145.xml · nonDerivative · entry 2

Hunter Danielle E. · CIK 0001677619 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,710

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (together, the "2026 RSU Grants"). Each RSU subject to the 2026 RSU Grants is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · shares: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for each of the grants reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

F2 · balance_after: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for each of the grants reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

SEC source: 0001981599-26-000124 · wk-form4a_1787188145.xml · nonDerivative · entry 1

Hunter Danielle E. · CIK 0001677619 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,193

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on August 12, 2026 (together, the "2026 RSU Grants"). Each RSU subject to the 2026 RSU Grants is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · shares: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for each of the grants reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

F2 · balance_after: This Form 4/A is being filed to amend the Form 4 filed by the Reporting Person on August 12, 2026, solely to correct the number of RSUs previously reported for each of the grants reported on Table I therein (and the resulting total number of shares of the Issuer's common stock in which the Reporting Person has a pecuniary interest). This Form 4/A does not report any new transactions or otherwise modify any other transaction details that were previously reported.

SEC source: 0001981599-26-000069 · wk-form4_1779316126.xml · nonDerivative · entry 1

DeMaria Dustin · CIK 0002016650 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,736

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000073 · wk-form4_1779316233.xml · nonDerivative · entry 2

Patton Charles R. · CIK 0001473188 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,309

F2 · shares: Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000070 · wk-form4_1779316152.xml · nonDerivative · entry 2

Haller Karen S · CIK 0001446274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,309

F2 · shares: Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000072 · wk-form4_1779316206.xml · nonDerivative · entry 2

Krummel Christopher A · CIK 0001431303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,809

F2 · shares: Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000074 · wk-form4_1779316288.xml · nonDerivative · entry 2

MARIUCCI ANNE L · CIK 0001288050 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 89,709

F2 · shares: Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000068 · wk-form4_1779316092.xml · nonDerivative · entry 1

NIELSEN STEVEN E · CIK 0001240707 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,290

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan of Centuri Holdings, Inc. (the "Issuer") on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000075 · wk-form4_1779316311.xml · nonDerivative · entry 2

Evans Andrew W · CIK 0001338158 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,309

F2 · shares: Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000071 · wk-form4_1779316177.xml · nonDerivative · entry 2

Dill Julie · CIK 0001357564 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,309

F2 · shares: (2) Represents the grant of RSUs pursuant to the Plan on May 19, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and will be settled by delivery of one share of the Issuer's common stock.

SEC source: 0001981599-26-000073 · wk-form4_1779316233.xml · derivative · entry 3

Patton Charles R. · CIK 0001473188 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000073 · wk-form4_1779316233.xml · nonDerivative · entry 1

Patton Charles R. · CIK 0001473188 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,242

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000070 · wk-form4_1779316152.xml · derivative · entry 3

Haller Karen S · CIK 0001446274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000070 · wk-form4_1779316152.xml · nonDerivative · entry 1

Haller Karen S · CIK 0001446274 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,242

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000072 · wk-form4_1779316206.xml · derivative · entry 3

Krummel Christopher A · CIK 0001431303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000072 · wk-form4_1779316206.xml · nonDerivative · entry 1

Krummel Christopher A · CIK 0001431303 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,742

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000074 · wk-form4_1779316288.xml · derivative · entry 3

MARIUCCI ANNE L · CIK 0001288050 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000074 · wk-form4_1779316288.xml · nonDerivative · entry 1

MARIUCCI ANNE L · CIK 0001288050 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,642

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000075 · wk-form4_1779316311.xml · derivative · entry 3

Evans Andrew W · CIK 0001338158 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000075 · wk-form4_1779316311.xml · nonDerivative · entry 1

Evans Andrew W · CIK 0001338158 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,242

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000071 · wk-form4_1779316177.xml · derivative · entry 3

Dill Julie · CIK 0001357564 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 7,338 shares

Expires not disclosed

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 · derivative.exercise_price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.exercise_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

F1 · derivative.expiration_date: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000071 · wk-form4_1779316177.xml · nonDerivative · entry 1

Dill Julie · CIK 0001357564 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,242

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 · price: On April 16, 2025, the Reporting Person was granted 7,338 restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer"), which vested in full on May 18, 2026 (the "2025 RSU Grant"). Each RSU subject to the 2025 RSU Grant is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the 2025 RSU Grant.

SEC source: 0001981599-26-000032 · wk-form4_1772148092.xml · nonDerivative · entry 1

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 197,904

F1 · kind: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units. This is not an open market sale of securities.

SEC source: 0001981599-26-000028 · wk-form4_1772147989.xml · nonDerivative · entry 1

Chilton Kendra · CIK 0002045397 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,968

F1 · kind: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units. This is not an open market sale of securities.

SEC source: 0001981599-26-000026 · wk-form4_1772147863.xml · nonDerivative · entry 1

Izenstark Gregory A. · CIK 0002016667 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,808

F1 · kind: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units. This is not an open market sale of securities.

SEC source: 0001981599-26-000030 · wk-form4_1772148061.xml · nonDerivative · entry 1

Wilcock Jason S. · CIK 0002016642 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,736

F1 · kind: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of restricted stock units. This is not an open market sale of securities.

SEC source: 0001981599-26-000014 · wk-form4_1771546428.xml · derivative · entry 3

Chilton Kendra · CIK 0002045397 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,186

Underlying: Common Stock · 2,186 shares

Expires not disclosed

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.

F5 · derivative.exercise_price: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.exercise_date: On February 25, 2025, the reporting person was granted a total of 6,245 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.exercise_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 2,186 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.expiration_date: On February 25, 2025, the reporting person was granted a total of 6,245 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.expiration_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 2,186 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F5 · balance_after: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000014 · wk-form4_1771546428.xml · nonDerivative · entry 2

Chilton Kendra · CIK 0002045397 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,422

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 · price: On February 25, 2025, the reporting person was granted a total of 6,245 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · price: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 2,186 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000014 · wk-form4_1771546428.xml · nonDerivative · entry 1

Chilton Kendra · CIK 0002045397 · SVP, Chief Accounting Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,236

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer") on February 17, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · balance_after: The reporting person has reported prior grants of RSUs in Table II of Form 4. The total reported in Column 5 of Table I includes the 2026 RSU Grant, 11,405 RSUs granted pursuant to the Plan and previously reported in Table II (the "Previous RSU Grants"), and 3,717 shares of common stock. As of the date of this Form 4, the Previous RSU Grants may be settled only by delivery of an equal number of shares of the Issuer's common stock.

SEC source: 0001981599-26-000012 · wk-form4_1771546350.xml · derivative · entry 3

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,417

Underlying: Common Stock · 31,417 shares

Expires not disclosed

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.

F5 · derivative.exercise_price: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.exercise_date: On February 25, 2025, the reporting person was granted a total of 89,720 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.exercise_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 31,417 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.expiration_date: On February 25, 2025, the reporting person was granted a total of 89,720 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.expiration_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 31,417 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F5 · balance_after: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000012 · wk-form4_1771546350.xml · nonDerivative · entry 2

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 202,797

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 · price: On February 25, 2025, the reporting person was granted a total of 89,720 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · price: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 31,417 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000012 · wk-form4_1771546350.xml · nonDerivative · entry 1

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 171,380

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer") on February 17, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · balance_after: The reporting person has reported prior grants of RSUs in Table II of Form 4. The total reported in Column 5 of Table I includes the 2026 RSU Grant, 103,608 RSUs granted pursuant to the Plan and previously reported in Table II (the "Previous RSU Grants"), and 22,089 shares of common stock. As of the date of this Form 4, the Previous RSU Grants may be settled only by delivery of an equal number of shares of the Issuer's common stock.

SEC source: 0001981599-26-000010 · wk-form4_1771546256.xml · derivative · entry 3

Wilcock Jason S. · CIK 0002016642 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,586

Underlying: Common Stock · 10,586 shares

Expires not disclosed

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.

F5 · derivative.exercise_price: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.exercise_date: On February 25, 2025, the reporting person was granted a total of 30,233 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.exercise_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 10,586 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.expiration_date: On February 25, 2025, the reporting person was granted a total of 30,233 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.expiration_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 10,586 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F5 · balance_after: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000010 · wk-form4_1771546256.xml · nonDerivative · entry 2

Wilcock Jason S. · CIK 0002016642 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,720

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 · price: On February 25, 2025, the reporting person was granted a total of 30,233 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · price: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 10,586 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000010 · wk-form4_1771546256.xml · nonDerivative · entry 1

Wilcock Jason S. · CIK 0002016642 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 56,134

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer") on February 17, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · balance_after: The reporting person has reported prior grants of RSUs in Table II of Form 4. The total reported in Column 5 of Table I includes the 2026 RSU Grant, 20,155 RSUs granted pursuant to the Plan and previously reported in Table II (the "Previous RSU Grants"), and 26,524 shares of common stock. As of the date of this Form 4, the Previous RSU Grants may be settled only by delivery of an equal number of shares of the Issuer's common stock.

SEC source: 0001981599-26-000013 · wk-form4_1771546394.xml · derivative · entry 3

Izenstark Gregory A. · CIK 0002016667 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,111

Underlying: Common Stock · 16,111 shares

Expires not disclosed

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.

F5 · derivative.exercise_price: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.exercise_date: On February 25, 2025, the reporting person was granted a total of 46,009 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.exercise_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 16,111 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F3 · derivative.expiration_date: On February 25, 2025, the reporting person was granted a total of 46,009 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · derivative.expiration_date: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 16,111 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

F5 · balance_after: The reported transaction involved the reporting person's receipt of the 2025 Earned RSUs. The reporting person previously reported the 2025 Performance Award in Table II of Form 4. As of the date of this Form 4, the 2025 Performance Award may be settled only by delivery of a number of shares of the Issuer's common stock equal to the number of 2025 Earned RSUs plus any additional RSUs subject to the 2025 Performance Award that are earned based on the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000013 · wk-form4_1771546394.xml · nonDerivative · entry 2

Izenstark Gregory A. · CIK 0002016667 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 90,676

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 · price: On February 25, 2025, the reporting person was granted a total of 46,009 performance stock units pursuant to the Plan (the "2025 Performance Award"), assuming target level of achievement of the applicable performance goals. One-third of the units subject to the 2025 Performance Award were eligible to be earned based on achievement of performance goals for the fiscal year of the Issuer ended December 28, 2025 (the "First Performance Period"), and the remaining two-thirds of the units subject to the 2025 Performance Award are eligible to be earned based on achievement of performance goals for the two fiscal years of the Issuer ending January 2, 2028 (the "Second Performance Period").

F4 · price: On February 17, 2026, the Issuer's board of directors certified achievement of the performance goals for the First Performance Period at 105.1% of the target level, resulting in the reporting person earning 16,111 RSUs (the "2025 Earned RSUs"). The 2025 Earned RSUs are scheduled to vest based on the reporting person's continued service through the later of February 25, 2028 and the date that the Issuer's board of directors (or a committee thereof) certifies the level of achievement of the performance goals for the Second Performance Period.

SEC source: 0001981599-26-000013 · wk-form4_1771546394.xml · nonDerivative · entry 1

Izenstark Gregory A. · CIK 0002016667 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 74,565

F1 · shares: Represents the grant of restricted stock units ("RSUs") pursuant to the Omnibus Incentive Plan (the "Plan") of Centuri Holdings, Inc. (the "Issuer") on February 17, 2026 (the "2026 RSU Grant"). Each RSU subject to the 2026 RSU Grant is the economic equivalent of one share of the Issuer's common stock and may be settled by delivery of one share of the Issuer's common stock.

F2 · balance_after: The reporting person has reported prior grants of RSUs in Table II of Form 4. The total reported in Column 5 of Table I includes the 2026 RSU Grant, 30,673 RSUs granted pursuant to the Plan and previously reported in Table II (the "Previous RSU Grants"), and 32,583 shares of common stock. As of the date of this Form 4, the Previous RSU Grants may be settled only by delivery of an equal number of shares of the Issuer's common stock.

SEC source: 0001981599-26-000003 · wk-form4_1770165591.xml · derivative · entry 5

Connell James W. Jr. · CIK 0002016584 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 17,687 shares

Expires not disclosed

F6 · derivative.exercise_price: Each performance stock unit ("PSU") is the economic equivalent of one share of the Issuer's common stock.

F7 · derivative.exercise_date: On February 25, 2025, the Reporting Person was granted 17,687 PSUs, which were eligible to be earned by the Reporting Person based on the achievement of certain performance metrics, as set forth in the applicable PSU award agreement by and between the Issuer and the Reporting Person, over a one-year initial performance period from January 1, 2025 to December 31, 2025 and a subsequent two-year performance period from January 1, 2026 to December 31, 2027 (collectively, the "Performance Period"). Earned shares would have vested after the Performance Period. A total of 17,687 PSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026.

F7 · derivative.expiration_date: On February 25, 2025, the Reporting Person was granted 17,687 PSUs, which were eligible to be earned by the Reporting Person based on the achievement of certain performance metrics, as set forth in the applicable PSU award agreement by and between the Issuer and the Reporting Person, over a one-year initial performance period from January 1, 2025 to December 31, 2025 and a subsequent two-year performance period from January 1, 2026 to December 31, 2027 (collectively, the "Performance Period"). Earned shares would have vested after the Performance Period. A total of 17,687 PSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026.

SEC source: 0001981599-26-000003 · wk-form4_1770165591.xml · derivative · entry 4

Connell James W. Jr. · CIK 0002016584 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 11,791 shares

Expires not disclosed

F1 · derivative.exercise_price: Each restricted stock unit ("RSU") is the economic equivalent of one share of the Centuri Holdings, Inc.'s (the "Issuer") common stock.

F5 · derivative.exercise_date: On February 25, 2025, the Reporting Person was granted 11,791 RSUs, which were to vest ratably over three years, with one-third of the RSUs to vest on each of the first three anniversaries of the date of grant. A total of 11,791 RSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026.

F5 · derivative.expiration_date: On February 25, 2025, the Reporting Person was granted 11,791 RSUs, which were to vest ratably over three years, with one-third of the RSUs to vest on each of the first three anniversaries of the date of grant. A total of 11,791 RSUs were forfeited in connection with the Reporting Person's resignation from the Issuer on January 31, 2026.

SEC source: 0001981599-26-000003 · wk-form4_1770165591.xml · derivative · entry 3

Connell James W. Jr. · CIK 0002016584 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,791

Underlying: Common Stock · 19,011 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit ("RSU") is the economic equivalent of one share of the Centuri Holdings, Inc.'s (the "Issuer") common stock.

F2 · derivative.exercise_price: Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the RSUs.

F4 · derivative.exercise_date: On July 30, 2024, the Reporting Person was granted 19,011 RSUs, which vested in full on January 30, 2026.

F4 · derivative.expiration_date: On July 30, 2024, the Reporting Person was granted 19,011 RSUs, which vested in full on January 30, 2026.

SEC source: 0001981599-26-000003 · wk-form4_1770165591.xml · nonDerivative · entry 2

Connell James W. Jr. · CIK 0002016584 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,191

F3 · kind: Represents shares withheld by the issuer to satisfy tax withholding obligations in connection with the vesting of RSUs. This is not an open market sale of securities.

SEC source: 0001981599-26-000003 · wk-form4_1770165591.xml · nonDerivative · entry 1

Connell James W. Jr. · CIK 0002016584 · See Remarks

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,471

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 · price: Each restricted stock unit ("RSU") is the economic equivalent of one share of the Centuri Holdings, Inc.'s (the "Issuer") common stock.

F2 · price: Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the RSUs.

SEC source: 0001981599-25-000099 · wk-form4_1765242812.xml · nonDerivative · entry 1

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,089

F1 · shares: Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units on December 3, 2025. The sale was to satisfy tax withholding obligations to be funded by a 'sell to cover' transaction and does not represent a discretionary transaction by the Reporting Person.

SEC source: 0001981599-25-000093 · wk-form4_1764979780.xml · derivative · entry 2

Brown Christian · CIK 0002043826 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 103,608

Underlying: Common Stock · 29,197 shares

Expires not disclosed

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 · derivative.exercise_price: Each restricted stock unit (RSU) is the economic equivalent of one share of the Issuer's common stock. Pursuant to the applicable RSU award agreement by and between the Issuer and the Reporting Person, shares of the Issuer's common stock were delivered on a one-for-one basis upon the settlement of the RSUs.

F2 · derivative.exercise_date: On December 3, 2024, the Reporting Person was granted 72,992 RSUs, 40% of which vested on December 3, 2025, and 30% of which will vest on each of December 3, 2026 and December 3, 2027, in each case subject to the Reporting Person's continued services through the vesting dates pursuant to that certain offer letter, dated November 4, 2024, by and between the Issuer and the Reporting Person and the applicable award agreement and other terms and conditions set forth therein.

F2 · derivative.expiration_date: On December 3, 2024, the Reporting Person was granted 72,992 RSUs, 40% of which vested on December 3, 2025, and 30% of which will vest on each of December 3, 2026 and December 3, 2027, in each case subject to the Reporting Person's continued services through the vesting dates pursuant to that certain offer letter, dated November 4, 2024, by and between the Issuer and the Reporting Person and the applicable award agreement and other terms and conditions set forth therein.