CNM · Core & Main, Inc.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the earlier to occur of the one year anniversary of the grant date or the Issuer's next annual meeting of shareholders to be held in 2027 and be settled in shares of Class A common stock, subject to the reporting person's continued service as a director of the Issuer.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 16, 2026.

The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $52.4900 to $53.2200 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.

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.

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.

On April 17, 2026, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of February 13, 2024 (as amended, the "LLC Agreement"), 5,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 5,000 Paired Interests.

The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on January 16, 2026.

The price reported represents the weighted average price of shares of Class A common stock sold in multiple transactions at prices ranging from $51.4900 to $52.4700 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.

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.

On April 17, 2026, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 5,000 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, on a one-for-one basis.

On April 17, 2026, pursuant to the terms of an exchange agreement, dated as of July 22, 2021 (as amended, the "Exchange Agreement"), 5,000 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, on a one-for-one basis.

On April 17, 2026, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of February 13, 2024 (as amended, the "LLC Agreement"), 5,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 5,000 Paired Interests.

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.

On April 17, 2026, pursuant to the terms of the Fourth Amended and Restated LLC Agreement of Core & Main Management Feeder, LLC ("Management Feeder"), dated as of February 13, 2024 (as amended, the "LLC Agreement"), 5,000 vested common units ("Units") held directly by the reporting person were redeemed at the discretion of the reporting person for 5,000 Paired Interests.

Represents restricted stock units granted as director compensation. The restricted stock units will vest upon the annual meeting of shareholders to be held in 2026 and be settled in shares of Class A common stock.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

Represents restricted stock units ("RSUs") granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

Represents RSUs granted to the reporting person. Each RSU represents a contingent right to receive one share of Class A common stock of the Issuer. The RSUs vest in three equal annual installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Restricted Stock Unit Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

The options vest in three equal installments on March 11, 2027, March 11, 2028 and March 11, 2029, subject to the terms of the associated Participant Stock Option Agreement.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units ("RSUs") granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.

Represents shares withheld by the Issuer for tax withholding purposes upon the vesting of a portion of restricted stock units granted to the reporting person.