CNM

SEC source: 0001209191-23-055624 · doc4.xml · derivative · entry 9

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 November 15, 2023, pursuant to the terms of the LLC Agreement, 25,000 vested Units held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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: 0001209191-23-055624 · doc4.xml · derivative · entry 8

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 898,456

Underlying: Class A Common Stock · 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 November 15, 2023, pursuant to the terms of the LLC Agreement, 25,000 vested Units held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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: 0001209191-23-055624 · doc4.xml · nonDerivative · entry 4

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,679

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 July 14, 2023.

F8 · price: The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $34.0000 to $34.0700 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 14,679 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: 0001209191-23-055624 · doc4.xml · nonDerivative · entry 3

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,679

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 November 15, 2023, pursuant to the terms of the Exchange Agreement 25,000 Paired Interests were exchanged for shares of Class A common stock, on a one-for-one basis.

F7 · shares: On November 15, 2023, pursuant to the terms of the LLC Agreement, 25,000 vested Units held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 Paired Interests.

F3 · balance_after: Includes 14,679 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: 0001209191-23-055808 · doc4.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 · 12,500 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.

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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 12,500 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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 12,500 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.

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: 0001209191-23-055808 · doc4.xml · derivative · entry 4

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 12,500

Underlying: Class A Common Stock · 12,500 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 12,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 12,500 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: 0001209191-23-055808 · doc4.xml · derivative · entry 3

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

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 261,480

Underlying: Class A Common Stock · 12,500 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 12,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 12,500 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: 0001209191-23-055808 · doc4.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 $33.5000 to $33.6450 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: 0001209191-23-055808 · doc4.xml · nonDerivative · entry 1

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

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 15,968

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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 12,500 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 12,500 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 12,500 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: 0001209191-23-055812 · doc4.xml · derivative · entry 5

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 40,000 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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 40,000 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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 40,000 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: 0001209191-23-055812 · doc4.xml · derivative · entry 4

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 40,000

Underlying: Class A Common Stock · 40,000 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 40,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 40,000 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: 0001209191-23-055812 · doc4.xml · derivative · entry 3

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 916,250

Underlying: Class A Common Stock · 40,000 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 40,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 40,000 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: 0001209191-23-055812 · doc4.xml · nonDerivative · entry 2

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,221

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 21, 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 $34.0000 to $34.0550 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 19,221 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: 0001209191-23-055812 · doc4.xml · nonDerivative · entry 1

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 59,221

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 November 15, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 40,000 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 November 15, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 40,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 40,000 Paired Interests.

F3 · balance_after: Includes 19,221 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: 0001209191-23-055624 · doc4.xml · derivative · entry 7

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 November 14, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 25,000 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 November 14, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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: 0001209191-23-055624 · doc4.xml · derivative · entry 6

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 25,000

Underlying: Class A Common Stock · 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 November 14, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 25,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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: 0001209191-23-055624 · doc4.xml · derivative · entry 5

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 923,456

Underlying: Class A Common Stock · 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 November 14, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 25,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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 disinterested members of the Issuer's board of directors, for cash from a substantially concurrent public offering or private sales (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: 0001209191-23-055624 · doc4.xml · nonDerivative · entry 2

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,679

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 July 14, 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 $33.0000 to $33.1450 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 14,679 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: 0001209191-23-055624 · doc4.xml · nonDerivative · entry 1

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,679

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 November 14, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 25,000 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 November 14, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 25,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 25,000 Paired Interests.

F3 · balance_after: Includes 14,679 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: 0001209191-23-054844 · doc4.xml · derivative · entry 10

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 28,037,893

Underlying: Class A Common Stock · 1,874,272 shares

Expires not disclosed

F9 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F10 · kind: Represents a redemption of Partnership Interests by Core & Main Holdings, LP at $30.440 per share, the same price per share of Class A common stock of the Issuer paid by the underwriter to the reporting person in the concurrent underwritten offering. In connection with the redemption, the Issuer repurchased a corresponding number of shares of Class B common stock of the Issuer from the reporting person for no additional consideration.

F9 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F9 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F6 · ownership.direct: Represents securities held by CD&R Waterworks Holdings, LLC ("Waterworks Holdings").

F7 · ownership.direct: CD&R Waterworks Holdings, L.P. ("Waterworks Holdings, L.P."), as the sole member and manager of Waterworks Holdings, CD&R Waterworks Holdings GP, as the general partner of Waterworks Holdings, L.P., CD&R Associates X, as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates, as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by Waterworks Holdings. Each of Waterworks Holdings, L.P., CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by Waterworks Holdings, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054844 · doc4.xml · derivative · entry 9

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 29,912,165

Underlying: Class A Common Stock · 7,122,234 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.

F9 · derivative.exercise_price: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F5 · kind: On November 9, 2023, 7,122,234 limited partner interests of Core & Main Holdings, LP ("Partnership Interests") held directly by the reporting person, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, were exchanged for shares of Class A common stock of the Issuer on a one-for-one basis pursuant to an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement").

F9 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F9 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F6 · ownership.direct: Represents securities held by CD&R Waterworks Holdings, LLC ("Waterworks Holdings").

F7 · ownership.direct: CD&R Waterworks Holdings, L.P. ("Waterworks Holdings, L.P."), as the sole member and manager of Waterworks Holdings, CD&R Waterworks Holdings GP, as the general partner of Waterworks Holdings, L.P., CD&R Associates X, as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates, as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by Waterworks Holdings. Each of Waterworks Holdings, L.P., CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by Waterworks Holdings, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 8

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 3,836,199

F8 · kind: Represents a purchase of Class A common stock of the Issuer by the Issuer at $30.440 per share, the same price per share paid by the underwriter to the reporting person in the concurrent underwritten offering.

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

F4 · ownership.direct: Represents securities held by CD&R Fund X-A Waterworks B, L.P. ("Fund X-A B").

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 7

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 42,637,781

F8 · kind: Represents a purchase of Class A common stock of the Issuer by the Issuer at $30.440 per share, the same price per share paid by the underwriter to the reporting person in the concurrent underwritten offering.

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

F3 · ownership.direct: Represents securities held by CD&R Fund X Waterworks B1, L.P. ("Fund X B1").

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 6

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 284,871

F8 · kind: Represents a purchase of Class A common stock of the Issuer by the Issuer at $30.440 per share, the same price per share paid by the underwriter to the reporting person in the concurrent underwritten offering.

F1 · ownership.direct: Represents securities held by CD&R Fund X Advisor Waterworks B, L.P. ("Fund X Advisor B").

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 5

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 0

F6 · ownership.direct: Represents securities held by CD&R Waterworks Holdings, LLC ("Waterworks Holdings").

F7 · ownership.direct: CD&R Waterworks Holdings, L.P. ("Waterworks Holdings, L.P."), as the sole member and manager of Waterworks Holdings, CD&R Waterworks Holdings GP, as the general partner of Waterworks Holdings, L.P., CD&R Associates X, as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates, as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by Waterworks Holdings. Each of Waterworks Holdings, L.P., CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by Waterworks Holdings, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 4

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 7,122,234

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

F5 · kind: On November 9, 2023, 7,122,234 limited partner interests of Core & Main Holdings, LP ("Partnership Interests") held directly by the reporting person, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, were exchanged for shares of Class A common stock of the Issuer on a one-for-one basis pursuant to an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement").

F6 · ownership.direct: Represents securities held by CD&R Waterworks Holdings, LLC ("Waterworks Holdings").

F7 · ownership.direct: CD&R Waterworks Holdings, L.P. ("Waterworks Holdings, L.P."), as the sole member and manager of Waterworks Holdings, CD&R Waterworks Holdings GP, as the general partner of Waterworks Holdings, L.P., CD&R Associates X, as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates, as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by Waterworks Holdings. Each of Waterworks Holdings, L.P., CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by Waterworks Holdings, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 3

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 4,092,641

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

F4 · ownership.direct: Represents securities held by CD&R Fund X-A Waterworks B, L.P. ("Fund X-A B").

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 2

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 45,488,024

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

F3 · ownership.direct: Represents securities held by CD&R Fund X Waterworks B1, L.P. ("Fund X B1").

SEC source: 0001209191-23-054844 · doc4.xml · nonDerivative · entry 1

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 303,914

F1 · ownership.direct: Represents securities held by CD&R Fund X Advisor Waterworks B, L.P. ("Fund X Advisor B").

F2 · ownership.direct: CD&R Waterworks Holdings GP, Ltd. ("CD&R Waterworks Holdings GP"), as the general partner of each of Fund X Advisor B, Fund X B1 (as defined below) and Fund X-A B (as defined below) (collectively, the "CD&R Blocker Fund AIVs"), CD&R Associates X Waterworks, L.P. ("CD&R Associates X"), as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates X, Ltd. ("CD&R Investment Associates"), as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by the CD&R Blocker Fund AIVs. Each of CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by the CD&R Blocker Fund AIVs, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-055053 · doc4.xml · derivative · entry 5

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 20,000 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 November 9, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 20,000 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 November 9, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 20,000 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: 0001209191-23-055053 · doc4.xml · derivative · entry 4

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 20,000

Underlying: Class A Common Stock · 20,000 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 November 9, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 20,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 20,000 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: 0001209191-23-055053 · doc4.xml · derivative · entry 3

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 956,250

Underlying: Class A Common Stock · 20,000 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 November 9, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 20,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 20,000 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: 0001209191-23-055053 · doc4.xml · nonDerivative · entry 2

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 19,221

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 21, 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 $32.0000 to $32.3600 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 19,221 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: 0001209191-23-055053 · doc4.xml · nonDerivative · entry 1

Witkowski Mark R · CIK 0001866738 · Chief Financial Officer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 39,221

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 November 9, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 20,000 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 November 9, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 20,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 20,000 Paired Interests.

F3 · balance_after: Includes 19,221 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: 0001209191-23-055337 · doc4.xml · derivative · entry 6

CD&R Investment Associates X, Ltd. · CIK 0001759120 · 10% owner

CD&R Fund X Waterworks B1, L.P. · CIK 0001871836 · 10% owner

CD&R Fund X-A Waterworks B, L.P. · CIK 0001871835 · 10% owner

CD&R Waterworks Holdings, L.P. · CIK 0001871833 · 10% owner

CD&R Waterworks Holdings GP, Ltd. · CIK 0001871834 · 10% owner

CD&R Fund X Advisor Waterworks B, L.P. · CIK 0001871837 · 10% owner

CD&R Waterworks Holdings, LLC · CIK 0001874292 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: No plan indicated

Ownership: Indirect · By Affiliate

Disclosed balance after: 26,969,558

Underlying: Class A Common Stock · 1,068,335 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, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F5 · kind: On November 15, 2023, 1,068,335 limited partner interests of Core & Main Holdings, LP ("Partnership Interests") held directly by the reporting person, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, were exchanged for shares of Class A common stock of the Issuer on a one-for-one basis pursuant to an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement").

F8 · derivative.exercise_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F8 · derivative.expiration_date: Pursuant to the terms of the Exchange Agreement, Partnership Interests, together with the retirement of a corresponding number of shares of Class B common stock of the Issuer, held by the reporting person are exchangeable at the discretion of the reporting person for shares of the Issuer's 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 the Issuer's Class A common stock sold in such public offering or private sale), net of any underwriting discounts and commissions, for each partnership interest exchanged, subject to certain exceptions, conditions and adjustments, and have no expiration date.

F6 · ownership.direct: Represents securities held by CD&R Waterworks Holdings, LLC ("Waterworks Holdings").

F7 · ownership.direct: CD&R Waterworks Holdings, L.P. ("Waterworks Holdings, L.P."), as the sole member and manager of Waterworks Holdings, CD&R Waterworks Holdings GP, as the general partner of Waterworks Holdings, L.P., CD&R Associates X, as the sole shareholder of CD&R Waterworks Holdings GP, and CD&R Investment Associates, as the general partner of CD&R Associates X, may be deemed to beneficially own the securities held by Waterworks Holdings. Each of Waterworks Holdings, L.P., CD&R Waterworks Holdings GP, CD&R Associates X and CD&R Investment Associates expressly disclaims beneficial ownership of the securities held by Waterworks Holdings, except to the extent of its pecuniary interest therein.

SEC source: 0001209191-23-054049 · doc4.xml · derivative · entry 11

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Class A Common Stock · 9,890 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.

F11 · 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.

F11 · 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 October 31, 2023, pursuant to the terms of the Exchange Agreement, 9,890 Paired Interests were exchanged for shares of Class A common stock, on a one-for-one basis.

F6 · shares: On October 31, 2023, pursuant to the terms of the Exchange Agreement, 9,890 Paired Interests were exchanged for shares of Class A common stock, on a one-for-one basis.

F11 · 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.

F11 · 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: 0001209191-23-054049 · doc4.xml · derivative · entry 10

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 9,890

Underlying: Class A Common Stock · 9,890 shares

Expires not disclosed

F11 · 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.

F11 · 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 October 31, 2023, pursuant to the terms of the LLC Agreement, 9,890 vested Units held indirectly by the reporting person through the Trust were redeemed at the discretion of the Trust for 9,890 Paired Interests.

F11 · 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.

F11 · 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: 0001209191-23-054049 · doc4.xml · derivative · entry 9

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 218,620

Underlying: Class A Common Stock · 9,890 shares

Expires not disclosed

F10 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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 October 31, 2023, pursuant to the terms of the LLC Agreement, 9,890 vested Units held indirectly by the reporting person through the Trust were redeemed at the discretion of the Trust for 9,890 Paired Interests.

F10 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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.

F10 · ownership.direct: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

SEC source: 0001209191-23-054049 · doc4.xml · nonDerivative · entry 4

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Trust on June 26, 2023.

F8 · price: The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $30.0000 to $30.1050 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 · ownership.direct: Represents securities held indirectly by the reporting person through the Trust.

SEC source: 0001209191-23-054049 · doc4.xml · nonDerivative · entry 3

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 9,890

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 October 31, 2023, pursuant to the terms of the Exchange Agreement, 9,890 Paired Interests were exchanged for shares of Class A common stock, on a one-for-one basis.

F7 · shares: On October 31, 2023, pursuant to the terms of the LLC Agreement, 9,890 vested Units held indirectly by the reporting person through the Trust were redeemed at the discretion of the Trust for 9,890 Paired Interests.

F3 · ownership.direct: Represents securities held indirectly by the reporting person through the Trust.

SEC source: 0001209191-23-054049 · doc4.xml · derivative · entry 8

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

Underlying: Class A Common Stock · 2,610 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.

F11 · 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.

F11 · 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 October 30, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 2,610 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 October 30, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 2,610 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.

F11 · 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.

F11 · 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: 0001209191-23-054049 · doc4.xml · derivative · entry 7

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 2,610

Underlying: Class A Common Stock · 2,610 shares

Expires not disclosed

F11 · 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.

F11 · 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 October 30, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 2,610 vested common units ("Units") held indirectly by the reporting person through the James G. Castellano 2021 Family Trust (the "Trust") were redeemed at the discretion of the Trust for 2,610 Paired Interests.

F11 · 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.

F11 · 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: 0001209191-23-054049 · doc4.xml · derivative · entry 6

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 228,510

Underlying: Class A Common Stock · 2,610 shares

Expires not disclosed

F10 · derivative.exercise_price: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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 October 30, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 2,610 vested common units ("Units") held indirectly by the reporting person through the James G. Castellano 2021 Family Trust (the "Trust") were redeemed at the discretion of the Trust for 2,610 Paired Interests.

F10 · derivative.exercise_date: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

F11 · 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.

F10 · ownership.direct: Represents securities held by Management Feeder in respect of Units held indirectly by the reporting person through the Trust. Pursuant to the LLC Agreement, such vested Units held by the Trust are redeemable at the discretion of the Trust for Paired Interests, on a one-for-one basis.

SEC source: 0001209191-23-054049 · doc4.xml · nonDerivative · entry 2

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 0

F4 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Trust on June 26, 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 $30.0000 to $30.0100 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 · ownership.direct: Represents securities held indirectly by the reporting person through the Trust.

SEC source: 0001209191-23-054049 · doc4.xml · nonDerivative · entry 1

Castellano James G · CIK 0001866541 · Director

10b5-1 filing: Plan reported

Ownership: Indirect · By Trust

Disclosed balance after: 2,610

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 October 30, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 2,610 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 October 30, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 2,610 vested common units ("Units") held indirectly by the reporting person through the James G. Castellano 2021 Family Trust (the "Trust") were redeemed at the discretion of the Trust for 2,610 Paired Interests.

F3 · ownership.direct: Represents securities held indirectly by the reporting person through the Trust.

SEC source: 0001209191-23-052908 · doc4.xml · derivative · entry 5

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Class A Common Stock · 50,000 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 October 12, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 50,000 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 October 12, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 50,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 50,000 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: 0001209191-23-052908 · doc4.xml · derivative · entry 4

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 50,000

Underlying: Class A Common Stock · 50,000 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 October 12, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 50,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 50,000 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: 0001209191-23-052908 · doc4.xml · derivative · entry 3

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Indirect · By LLC

Disclosed balance after: 948,456

Underlying: Class A Common Stock · 50,000 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 October 12, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 50,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 50,000 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: 0001209191-23-052908 · doc4.xml · nonDerivative · entry 2

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 14,679

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 July 14, 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 $31.5600 to $32.0400 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 14,679 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: 0001209191-23-052908 · doc4.xml · nonDerivative · entry 1

Cowles Bradford A · CIK 0001866531 · President

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 64,679

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 October 12, 2023, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 50,000 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 October 12, 2023, pursuant to the terms of the Third Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of July 22, 2021 (as amended, the "LLC Agreement"), 50,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 50,000 Paired Interests.

F3 · balance_after: Includes 14,679 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.