CNM

SEC source: 0001856525-25-000009 · wk-form4_1736900234.xml · nonDerivative · entry 3

Whittenburg Mark G · CIK 0001866737 · General Counsel and Secretary

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,215

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 12,933 RSUs originally granted an aggregate of 1,718 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 3,548 shares of Class A common stock have vested and sold with 7,667 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000009 · wk-form4_1736900234.xml · nonDerivative · entry 2

Whittenburg Mark G · CIK 0001866737 · General Counsel and Secretary

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 11,724

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 12,933 RSUs originally granted an aggregate of 1,718 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 3,548 shares of Class A common stock have vested and sold with 7,667 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000020 · wk-form4_1737151225.xml · nonDerivative · entry 3

Stephens John Weldon · CIK 0001874955 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,679

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 4,281 RSUs originally granted an aggregate of 602 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 1,135 shares of Class A common stock have vested with 2,544 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000020 · wk-form4_1737151225.xml · nonDerivative · entry 2

Stephens John Weldon · CIK 0001874955 · Chief Accounting Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,880

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 4,281 RSUs originally granted an aggregate of 602 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 1,135 shares of Class A common stock have vested with 2,544 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000021 · wk-form4_1737151237.xml · nonDerivative · entry 3

Giles Jeffrey D · CIK 0001866555 · EVP, Corporate Department

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,233

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 14,354 RSUs originally granted an aggregate of 1,382 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 2,739 shares of Class A common stock have vested and sold with 10,233 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000021 · wk-form4_1737151237.xml · nonDerivative · entry 2

Giles Jeffrey D · CIK 0001866555 · EVP, Corporate Department

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 10,668

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 14,354 RSUs originally granted an aggregate of 1,382 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 2,739 shares of Class A common stock have vested and sold with 10,233 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000018 · wk-form4_1737151203.xml · nonDerivative · entry 3

Schneider Laura K · CIK 0001866572 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,664

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 11,967 RSUs originally granted an aggregate of 1,303 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 3,543 shares of Class A common stock have vested with 7,121 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000018 · wk-form4_1737151203.xml · nonDerivative · entry 2

Schneider Laura K · CIK 0001866572 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,099

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 11,967 RSUs originally granted an aggregate of 1,303 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 3,543 shares of Class A common stock have vested with 7,121 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000017 · wk-form4_1737151192.xml · nonDerivative · entry 3

LeClair Stephen O · CIK 0001659312 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 81,137

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 92,349 RSUs originally granted an aggregate of 11,212 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 25,266 shares of Class A common stock have vested with 55,871 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000017 · wk-form4_1737151192.xml · nonDerivative · entry 2

LeClair Stephen O · CIK 0001659312 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 85,189

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 92,349 RSUs originally granted an aggregate of 11,212 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 25,266 shares of Class A common stock have vested with 55,871 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000019 · wk-form4_1737151214.xml · nonDerivative · entry 3

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,916

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 23,898 RSUs originally granted an aggregate of 2,982 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 6,609 shares of Class A common stock have vested with 14,307 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-25-000019 · wk-form4_1737151214.xml · nonDerivative · entry 2

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 21,845

F1 · kind: Represents prior share forfeitures to the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

F2 · balance_after: Of the 23,898 RSUs originally granted an aggregate of 2,982 shares of Class A common stock have been forfeited to the Issuer for tax withholdings purposes and an aggregate of 6,609 shares of Class A common stock have vested with 14,307 RSUs remaining unvested, as of the date of this Form 4. Each RSU represents a contingent right to receive one share of Class A common stock. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest on March 11, 2025. The RSUs granted on March 10, 2023 vest in two equal installments on March 10, 2025 and March 10, 2026. The RSUs granted on March 7, 2024 vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027. All RSU vesting is subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000030 · wk-form4_1710205931.xml · derivative · entry 3

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,366

Underlying: Class A Common Stock · 6,366 shares

Expires 2034-03-07

F4 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000030 · wk-form4_1710205931.xml · nonDerivative · entry 1

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,281

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A common stock"). The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000015 · wk-form4_1710205483.xml · derivative · entry 6

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 43,900 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.

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F1 · kind: On March 7, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 43,900 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F1 · shares: On March 7, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 43,900 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000015 · wk-form4_1710205483.xml · derivative · entry 5

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 43,900

Underlying: Class A Common Stock · 43,900 shares

Expires not disclosed

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On March 7, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 43,900 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 43,900 Paired Interests.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000015 · wk-form4_1710205483.xml · derivative · entry 4

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 197,980

Underlying: Class A Common Stock · 43,900 shares

Expires not disclosed

F7 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On March 7, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 43,900 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 43,900 Paired Interests.

F7 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · derivative.expiration_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · ownership.direct: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

SEC source: 0001856525-24-000015 · wk-form4_1710205483.xml · nonDerivative · entry 2

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,468

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 20, 2023.

F5 · price: The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $50.0000 to $50.0475 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

F3 · balance_after: Includes 3,468 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vests on March 11, 2025, subject to the terms of the associated Participant Restricted Stock Unit Agreement. The unvested portion of the RSUs granted on March 10, 2023 vests in two equal installments on March 10, 2025 and March 10, 2026, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000015 · wk-form4_1710205483.xml · nonDerivative · entry 1

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 47,368

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 · kind: On March 7, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 43,900 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F2 · shares: On March 7, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 43,900 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 43,900 Paired Interests.

F3 · balance_after: Includes 3,468 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vests on March 11, 2025, subject to the terms of the associated Participant Restricted Stock Unit Agreement. The unvested portion of the RSUs granted on March 10, 2023 vests in two equal installments on March 10, 2025 and March 10, 2026, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000029 · wk-form4_1710205914.xml · derivative · entry 2

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,382

Underlying: Class A Common Stock · 29,382 shares

Expires 2034-03-07

F3 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000029 · wk-form4_1710205914.xml · nonDerivative · entry 1

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,423

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000024 · wk-form4_1710205852.xml · derivative · entry 4

Giles Jeffrey D · CIK 0001866555 · VP, Corporate Department

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,062

Underlying: Class A Common Stock · 16,062 shares

Expires 2034-03-07

F5 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000024 · wk-form4_1710205852.xml · nonDerivative · entry 2

Giles Jeffrey D · CIK 0001866555 · VP, Corporate Department

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,354

F3 · shares: Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The RSUs vest on March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000024 · wk-form4_1710205852.xml · nonDerivative · entry 1

Giles Jeffrey D · CIK 0001866555 · VP, Corporate Department

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,263

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A common stock"). The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000026 · wk-form4_1710205876.xml · derivative · entry 2

Schaller John R · CIK 0001866571 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,382

Underlying: Class A Common Stock · 29,382 shares

Expires 2034-03-07

F3 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000026 · wk-form4_1710205876.xml · nonDerivative · entry 1

Schaller John R · CIK 0001866571 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,647

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000027 · wk-form4_1710205892.xml · derivative · entry 2

Schneider Laura K · CIK 0001866572 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,021

Underlying: Class A Common Stock · 18,021 shares

Expires 2034-03-07

F3 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000027 · wk-form4_1710205892.xml · nonDerivative · entry 1

Schneider Laura K · CIK 0001866572 · Chief Human Resources Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 11,967

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000025 · wk-form4_1710205865.xml · derivative · entry 2

LeClair Stephen O · CIK 0001659312 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,508

Underlying: Class A Common Stock · 146,508 shares

Expires 2034-03-07

F3 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000025 · wk-form4_1710205865.xml · nonDerivative · entry 1

LeClair Stephen O · CIK 0001659312 · Director · Chief Executive Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 92,349

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000031 · wk-form4_1710205943.xml · derivative · entry 3

Whittenburg Mark G · CIK 0001866737 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,999

Underlying: Class A Common Stock · 18,999 shares

Expires 2034-03-07

F4 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000031 · wk-form4_1710205943.xml · nonDerivative · entry 1

Whittenburg Mark G · CIK 0001866737 · General Counsel and Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,933

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer ("Class A common stock"). The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000028 · wk-form4_1710205903.xml · derivative · entry 2

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,726

Underlying: Class A Common Stock · 36,726 shares

Expires 2034-03-07

F3 · derivative.exercise_date: The options vest in three equal installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Stock Option Agreement.

SEC source: 0001856525-24-000028 · wk-form4_1710205903.xml · nonDerivative · entry 1

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,898

F1 · shares: Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 7, 2025, March 7, 2026 and March 7, 2027, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

F2 · balance_after: Includes RSUs previously granted to the reporting person.

SEC source: 0001856525-24-000013 · wk-form4_1709763699.xml · derivative · entry 5

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 1,100 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.

F7 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F1 · kind: On March 4, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 1,100 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F1 · shares: On March 4, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 1,100 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F7 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000013 · wk-form4_1709763699.xml · derivative · entry 4

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 1,100

Underlying: Class A Common Stock · 1,100 shares

Expires not disclosed

F7 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On March 4, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 1,100 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 1,100 Paired Interests.

F7 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000013 · wk-form4_1709763699.xml · derivative · entry 3

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 241,880

Underlying: Class A Common Stock · 1,100 shares

Expires not disclosed

F6 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F7 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F6 · date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F7 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On March 4, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 1,100 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 1,100 Paired Interests.

F6 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F7 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F6 · derivative.expiration_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F7 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F6 · ownership.direct: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

SEC source: 0001856525-24-000013 · wk-form4_1709763699.xml · nonDerivative · entry 2

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 3,468

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 20, 2023.

F5 · price: The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $50.0000 to $50.0400 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

F3 · balance_after: Includes 3,468 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest in two equal installments on March 11, 2024 and March 11, 2025, subject to the reporting person remaining employed with the Issuer through each vesting date. The RSUs granted on March 10, 2023 vest in three equal installments on March 10, 2024, March 10, 2025 and March 10, 2026, subject to the reporting person remaining employed with the Issuer through each vesting date.

SEC source: 0001856525-24-000013 · wk-form4_1709763699.xml · nonDerivative · entry 1

Stephens John Weldon · CIK 0001874955 · VP, Corp. Controller

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 4,568

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 · kind: On March 4, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 1,100 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F2 · shares: On March 4, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 1,100 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 1,100 Paired Interests.

F3 · balance_after: Includes 3,468 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on March 11, 2022 vest in two equal installments on March 11, 2024 and March 11, 2025, subject to the reporting person remaining employed with the Issuer through each vesting date. The RSUs granted on March 10, 2023 vest in three equal installments on March 10, 2024, March 10, 2025 and March 10, 2026, subject to the reporting person remaining employed with the Issuer through each vesting date.

SEC source: 0001856525-24-000011 · wk-form4_1708986113.xml · derivative · entry 6

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 9,500 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.

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F1 · kind: On February 22, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 9,500 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F1 · shares: On February 22, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 9,500 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000011 · wk-form4_1708986113.xml · derivative · entry 5

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,500

Underlying: Class A Common Stock · 9,500 shares

Expires not disclosed

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On February 22, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 9,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 9,500 Paired Interests.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000011 · wk-form4_1708986113.xml · derivative · entry 4

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 53,704

Underlying: Class A Common Stock · 9,500 shares

Expires not disclosed

F7 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F2 · shares: On February 22, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 9,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 9,500 Paired Interests.

F7 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · derivative.expiration_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · ownership.direct: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

SEC source: 0001856525-24-000011 · wk-form4_1708986113.xml · nonDerivative · entry 2

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,320

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2023.

F5 · price: The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $45.1200 to $45.4450 per share. The reporting person will provide to the Issuer, or the Securities and Exchange Commission staff, upon request, information regarding the number of shares sold at each price within the range.

F3 · balance_after: Includes 9,320 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on June 28, 2023 will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of stockholders to be held in 2024 and be settled in shares of Class A common stock, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000011 · wk-form4_1708986113.xml · nonDerivative · entry 1

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 18,820

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 · kind: On February 22, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 9,500 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F2 · shares: On February 22, 2024, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 9,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 9,500 Paired Interests.

F3 · balance_after: Includes 9,320 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on June 28, 2023 will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of stockholders to be held in 2024 and be settled in shares of Class A common stock, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · derivative · entry 11

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 313 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.

F10 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F6 · kind: On February 21, 2024, pursuant to the terms of the Exchange Agreement, 313 Paired Interests and were exchanged for shares of Class A common stock, on a one-for-one basis.

F6 · shares: On February 21, 2024, pursuant to the terms of the Exchange Agreement, 313 Paired Interests and were exchanged for shares of Class A common stock, on a one-for-one basis.

F10 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · derivative · entry 10

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 313

Underlying: Class A Common Stock · 313 shares

Expires not disclosed

F10 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · shares: On February 21, 2024, pursuant to the LLC Agreement, 313 Units held directly by the reporting person were redeemed at the discretion of the reporting person for 313 Paired Interests.

F10 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · derivative · entry 9

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 63,204

Underlying: Class A Common Stock · 313 shares

Expires not disclosed

F9 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F10 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F9 · date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F10 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F7 · shares: On February 21, 2024, pursuant to the LLC Agreement, 313 Units held directly by the reporting person were redeemed at the discretion of the reporting person for 313 Paired Interests.

F9 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F10 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F9 · derivative.expiration_date: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

F10 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F9 · ownership.direct: Represents securities held by Management Feeder in respect of Units directly held by the reporting person. Pursuant to the LLC Agreement, such vested Units held by the reporting person are redeemable at the discretion of the reporting person for Paired Interests, on a one-for-one basis.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · nonDerivative · entry 4

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,320

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on October 13, 2023.

F5 · price: The price reported represents the sale price per share of shares of Class A common stock sold in multiple transactions.

F3 · balance_after: Includes 9,320 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on June 28, 2023 will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of stockholders to be held in 2024 and be settled in shares of Class A common stock, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · nonDerivative · entry 3

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 9,633

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.

F6 · kind: On February 21, 2024, pursuant to the terms of the Exchange Agreement, 313 Paired Interests and were exchanged for shares of Class A common stock, on a one-for-one basis.

F7 · shares: On February 21, 2024, pursuant to the LLC Agreement, 313 Units held directly by the reporting person were redeemed at the discretion of the reporting person for 313 Paired Interests.

F3 · balance_after: Includes 9,320 restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock. The unvested portion of the RSUs granted on June 28, 2023 will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of stockholders to be held in 2024 and be settled in shares of Class A common stock, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

SEC source: 0001856525-24-000009 · wk-form4_1708555437.xml · derivative · entry 8

Kimbrough Orvin T · CIK 0001867452 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 187 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.

F10 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F1 · kind: On February 16, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 187 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F1 · shares: On February 16, 2024, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 187 shares of Class B common stock of the Issuer ("Class B common stock") and limited partnership interests of Core & Main Holdings, LP (together, a "Paired Interest") were exchanged for shares of Class A common stock of the Issuer ("Class A common stock"), on a one-for-one basis.

F10 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.

F10 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Paired Interests are exchangeable at the discretion of the reporting person for shares of Class A common stock on a one-for-one basis or, at the election of a majority of the disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sale (based on the price of Class A common stock sold in such public offering or private sale, net of any underwriting discounts and commissions, for each limited partnership interest exchanged, subject to certain exceptions, conditions and adjustments). The Class B common stock and limited partnership interests have no expiration date.