Document:

EX-10.8

 Exhibit 10.8 

FORM OF INDEMNIFICATION AGREEMENT 

Indemnification Agreement (this “Agreement”), dated as of [•], by and among Core & Main, Inc., a Delaware
corporation (“Topco”), Core & Main Holdings, LP, a Delaware limited partnership (“Holdings”), and Core & Main LP, a Florida limited partnership (“Opco” and, together with Topco and
Holdings, the “Companies”, and each, a “Company”) and [•] (“Indemnitee”). 

WHEREAS, qualified persons are reluctant to serve companies as managers, directors, officers or otherwise unless they are provided with
comprehensive indemnification and insurance against claims arising out of their service to and activities on behalf of the companies; and 

WHEREAS, the Companies have determined that attracting and retaining such persons is in the best interests of the Companies and their owners
and that it is reasonable, prudent and necessary for the Companies to indemnify such persons to the fullest extent permitted by applicable law and to provide reasonable assurance regarding insurance; 

NOW, THEREFORE, the Companies and Indemnitee hereby agree as follows: 

1. Defined Terms; Construction. 

(a) Defined Terms. As used in this Agreement, the following terms shall have the following meanings: 

“Corporate Status” means the status of a person who is or was a member of the Governing Body (or of any committee, sub-committee or special committee thereof), officer, employee or agent of any of the Companies or any of their subsidiaries, or of any predecessor thereof, or is or was serving at the request of any of the
Companies as a member of the Governing Body (or of any committee, sub-committee or special committee thereof), officer, employee or agent of another entity, or of any predecessor thereof, including service
with respect to an employee benefit plan. 
 “Determination” means a determination that either (x) there is a
reasonable basis for the conclusion that indemnification of Indemnitee is proper in the circumstances because Indemnitee met a particular standard of conduct (a “Favorable Determination”) or (y) there is no reasonable
basis for the conclusion that indemnification of Indemnitee is proper in the circumstances because Indemnitee met a particular standard of conduct (an “Adverse Determination”). An Adverse Determination shall include the decision
that a Determination was required in connection with indemnification and the decision as to the applicable standard of conduct. 

“DGCL” means the General Corporation Law of the State of Delaware, as amended from time to time. 

“Expenses” means all attorneys’ fees and expenses, retainers, court, arbitration and mediation costs, transcript costs,
fees and expenses of experts, witnesses and public relations consultants, bonds, costs of collecting and producing documents, travel expenses, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees and all
other disbursements or expenses of the types customarily incurred in connection with prosecuting, defending, preparing to prosecute or defend, investigating, being or preparing to be a witness in, appealing or otherwise participating in a
Proceeding. 

 “Governing Body” means in the case of a corporation its board of directors,
in the case of a limited liability company its board of managers or similar body, in the case of a limited partnership its board of directors or similar body and in the case of any other form of entity any similar governing body. 

“Independent Legal Counsel” means an attorney or firm of attorneys competent to render an opinion under the applicable law,
selected in accordance with the provisions of Section 5(e), who has not performed any services for any of the Companies or any of their subsidiaries or for Indemnitee (other than in connection with a Determination or a determination regarding
the rights of indemnitees under other indemnity agreements) within the past five years. 
 “Proceeding” means a threatened,
pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative, including without limitation a claim, demand, discovery request, formal or informal investigation, inquiry, administrative hearing,
arbitration or other form of alternative dispute resolution, including an appeal from any of the foregoing. 
 (b) Construction. For
purposes of this Agreement, 
 (i) References to a Company and its “subsidiaries” shall include any corporation,
limited liability company, partnership, joint venture, trust or other entity or enterprise that before or after the date of this Agreement is party to a merger or consolidation with such Company or any such subsidiary or that is a successor to such
Company as contemplated by Section 8(e). 
 (ii) References to “fines” shall include any excise taxes assessed
on Indemnitee with respect to an employee benefit plan. 
 (iii) References to a “witness” in connection with a
Proceeding shall include any interviewee or person called upon to produce documents in connection with such Proceeding. 
 2. Agreement
to Serve. 
 Indemnitee agrees to serve as a member of the Governing Body or as an officer of any or all of the Companies or one or more
of their subsidiaries and in such other capacities as Indemnitee may serve at the request of any of the Companies from time to time, and by their execution of this Agreement each of the Companies confirms its request that Indemnitee so serve.
Indemnitee shall be entitled to resign or otherwise terminate such service with immediate effect at any time, and neither such resignation or termination nor the length of such service shall affect Indemnitee’s rights under this Agreement. This
Agreement shall not constitute an employment agreement, supersede any employment agreement to which Indemnitee is a party or create any right of Indemnitee to continued employment or appointment. 

  
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 3. Indemnification. 

(a) General Indemnification. The Companies shall, and shall cause their subsidiaries to, indemnify Indemnitee, to the fullest extent
permitted by applicable law in effect on the date hereof or as amended to increase the scope of permitted indemnification, against Expenses, losses, liabilities, judgments, fines, penalties and amounts paid in settlement (including all interest,
taxes, assessments and other charges in connection therewith) incurred by Indemnitee or on Indemnitee’s behalf in connection with any Proceeding in any way connected with, resulting from or relating to Indemnitee’s Corporate Status. 

(b) Additional Indemnification Regarding Expenses. Without limiting the foregoing, in the event any Proceeding is initiated by
Indemnitee or by any of the Companies, any of their subsidiaries or any other person to enforce or interpret this Agreement or any rights of Indemnitee to indemnification or advancement of Expenses (or related obligations of Indemnitee) under any
Company’s or any such subsidiary’s certificate of incorporation, bylaws, limited liability company agreement, limited partnership agreement or other organizational agreement or instrument, any other agreement to which Indemnitee and any of
the Companies or any of their subsidiaries is party, any vote of stockholders, partners, directors, members or managers of any of the Companies or any of their subsidiaries, any applicable law or any liability insurance policy, the Companies shall
indemnify Indemnitee against all Expenses incurred by Indemnitee or on Indemnitee’s behalf in connection with such Proceeding in proportion to the success achieved by Indemnitee in such Proceeding and the efforts required to obtain that
success, as determined by the court or arbitrator presiding over such Proceeding. 
 (c) Partial Indemnification. If Indemnitee is
entitled under any provision of this Agreement to indemnification by the Companies for a portion of any Expenses, losses, liabilities, judgments, fines, penalties and amounts paid in settlement incurred by Indemnitee, but not for the total
amount thereof, the Companies shall nevertheless indemnify Indemnitee for such portion. 
 (d)
Non-exclusivity; Other Rights to Indemnification. The indemnification and advancement rights provided by this Agreement shall not be deemed exclusive of any other rights to which Indemnitee may now or
in the future be entitled under the certificate of incorporation, bylaws, limited liability company agreement, limited partnership agreement or other organizational agreement or instrument of any of the Companies or any of their subsidiaries, any
other agreement, any vote of stockholders, partners, directors, members or managers, any applicable law or any liability insurance policy; provided that, to the extent that Indemnitee is entitled to be indemnified by any or all of the
Companies and by any equity holder of the Companies or any affiliate (other than the Companies and their subsidiaries) of any such equity holder or any insurer under a policy procured by any such equity holder or affiliate, (i) the
obligations of the Companies hereunder shall be primary and the obligations of such equity holder, affiliate or insurer secondary, and (ii) the Companies shall not be entitled to contribution or indemnification from or subrogation
against such equity holder, affiliate or insurer. Any such equity holder or affiliate shall be entitled to enforce the Companies’ obligation to provide indemnification in accordance with the priorities set forth in this Section 3(d)
directly against the Companies, and each such equity holder or affiliate shall constitute an express intended third-party beneficiary under this Agreement for such purpose, and in the event that any such equity

  
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holder or affiliate makes indemnification payments or advances to Indemnitee in respect of any Expenses, losses, liabilities, judgments, fines, penalties or amounts paid in settlement for which
any or all of the Companies would also be obligated pursuant to this Agreement, the obligated Company or Companies shall reimburse such equity holder or affiliate in full on demand. 

(e) Exceptions. Any other provision herein to the contrary notwithstanding, the Companies shall not be obligated under this Agreement
to indemnify Indemnitee for (i) Expenses incurred in connection with Proceedings initiated or brought voluntarily by the Indemnitee and not by way of defense, counterclaim or crossclaim, except (x) as contemplated by
Section 3(b), (y) in specific cases if the Governing Body of Topco has approved the initiation or bringing of such Proceeding, and (z) as may be required by law, or (ii) an accounting of profits arising from the purchase
and sale by the Indemnitee of securities within the meaning of Section 16(b) of the Securities Exchange Act of 1934, as amended, or any similar successor statute. 

(f) Subrogation. Except as set forth in Section 3(d)(ii), in the event of payment under this Agreement, the Companies shall be
subrogated to the extent of such payment to all of the rights of recovery of Indemnitee, who shall execute such documents and do such acts as any of the Companies may reasonably request to secure such rights and to enable the Companies effectively
to bring suit to enforce such rights. 
 (g) Companies’ Obligations Joint and Several. Except as limited by the last sentence of
Section 8(e), the Companies shall be jointly and severally liable for all of their obligations to Indemnitee under this Agreement. 

4. Advancement of Expenses. 

The Companies shall pay all Expenses incurred by Indemnitee in connection with any Proceeding in any way connected with, resulting from or
relating to Indemnitee’s Corporate Status, other than a Proceeding initiated by Indemnitee for which the Companies would not be obligated to indemnify Indemnitee pursuant to Section 3(e)(i), in advance of the final disposition of such
Proceeding and without regard to whether Indemnitee will ultimately be entitled to be indemnified for such Expenses and without regard to whether an Adverse Determination has been made, except as contemplated by the last sentence of
Section 5(f). Indemnitee shall repay such amounts advanced if and to the extent that it shall ultimately be determined in a decision by a court of competent jurisdiction from which no appeal can be taken that Indemnitee is not entitled to be
indemnified by the Companies for such Expenses. Such repayment obligation shall be unsecured and shall not bear interest. The Companies shall not impose on Indemnitee additional conditions to advancement or require from Indemnitee additional
undertakings regarding repayment. 
 5. Indemnification Procedure. 

(a) Notice of Proceeding; Cooperation. Indemnitee shall give the Companies notice in writing as soon as practicable of any Proceeding
for which indemnification will or could be sought under this Agreement; provided that any failure or delay in giving such notice shall not relieve the Companies of their obligations under this Agreement unless and to the extent that
(i) none of the Companies nor any of their subsidiaries is party to or aware of such Proceeding and (ii) the Companies are materially prejudiced by such failure. 

  
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 (b) Settlement. The Companies will not, without the prior written consent of
Indemnitee, which may be provided or withheld in Indemnitee’s sole discretion, effect any settlement of any Proceeding against Indemnitee or which could have been brought against Indemnitee unless such settlement solely involves the payment of
money by persons other than Indemnitee and includes an unconditional release of Indemnitee from all liability on any matters that are the subject of such Proceeding and an acknowledgment that Indemnitee denies all wrongdoing in connection with such
matters. The Companies shall not be obligated to indemnify Indemnitee against amounts paid in settlement of a Proceeding against Indemnitee if such settlement is effected by Indemnitee without the Companies’ prior written consent, which shall
not be unreasonably withheld. 
 (c) Request for Payment; Timing of Payment. To obtain indemnification payments or advances under
this Agreement, Indemnitee shall submit to the Companies a written request therefor, together with such invoices or other supporting information as may be reasonably requested by the Companies and reasonably available to Indemnitee. The Companies
shall make indemnification payments to Indemnitee no later than 30 days, and advances to Indemnitee no later than 10 days, after receipt of the written request of Indemnitee. 

(d) Determination. The Companies intend that Indemnitee shall be indemnified to the fullest extent permitted by law as provided in
Section 3 and that no Determination shall be required in connection with such indemnification. In no event shall a Determination be required in connection with advancement of Expenses pursuant to Section 4 or in connection with
indemnification for Expenses incurred as a witness or incurred in connection with any Proceeding or portion thereof with respect to which Indemnitee has been successful on the merits or otherwise. Any decision that a Determination is required by law
in connection with any other indemnification of Indemnitee, and any such Determination, shall be made within 30 days after receipt of Indemnitee’s written request for indemnification, as follows, (i) by a majority vote of the
members of the Governing Body of Topco who are not parties to such Proceeding, even though less than a quorum, with the advice of Independent Legal Counsel, (ii) by a committee of such members designated by majority vote of such members,
even though less than a quorum, with the advice of Independent Legal Counsel, (iii) if there are no such members, or if such members so direct, by Independent Legal Counsel in a written opinion to the Companies and Indemnitee, or
(iv) by holders of a majority of the outstanding equity interests in Topco. The Companies shall pay all Expenses incurred by Indemnitee in connection with a Determination. 

(e) Independent Legal Counsel. Independent Legal Counsel shall be selected by the Governing Body of Topco and approved by Indemnitee
(which approval shall not be unreasonably withheld or delayed). The Companies shall pay the fees and expenses of Independent Legal Counsel and indemnify Independent Legal Counsel against any and all expenses (including attorneys’ fees), claims,
liabilities and damages arising out of or relating to its engagement. 

  
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 (f) Consequences of Determination; Remedies of Indemnitee. The Companies shall be
bound by and shall have no right to challenge a Favorable Determination. If an Adverse Determination is made, or if for any other reason the Companies do not make timely indemnification payments or advances of Expenses, Indemnitee shall have the
right to commence a Proceeding before a court of competent jurisdiction to challenge such Adverse Determination and/or to require the Companies to make such payments or advances (and the Companies shall have the right to defend their position in
such Proceeding and to appeal any adverse judgment in such Proceeding). Indemnitee shall be entitled to be indemnified for all Expenses incurred in connection with such a Proceeding in accordance with Section 3(b) and to have such Expenses
advanced by the Companies in accordance with Section 4. If Indemnitee fails to challenge an Adverse Determination, or if Indemnitee challenges an Adverse Determination and such Adverse Determination has been upheld by a final judgment of a
court of competent jurisdiction from which no appeal can be taken, then, to the extent and only to the extent required by such Adverse Determination or final judgment, the Companies shall not be obligated to indemnify or advance Expenses to
Indemnitee under this Agreement. 
 (g) Presumptions; Burden and Standard of Proof. In connection with any Determination, or any
review of any Determination, by any person, including a court: 
 (i) It shall be a presumption that a Determination is not
required. 
 (ii) It shall be a presumption that Indemnitee has met the applicable standard of conduct and that
indemnification of Indemnitee is proper in the circumstances. 
 (iii) The burden of proof shall be on the Companies to
overcome the presumptions set forth in the preceding clauses (i) and (ii), and each such presumption shall only be overcome if the Companies establish that there is no reasonable basis to support it. 

(iv) The termination of any Proceeding by judgment, order, finding, settlement (whether with or without court approval) or
conviction, or upon a plea of nolo contendere, or its equivalent, shall not create a presumption that indemnification is not proper or that Indemnitee did not meet the applicable standard of conduct or that a court has
determined that indemnification is not permitted by this Agreement or otherwise. 
 (v) Neither the failure of any person or
persons to have made a Determination nor an Adverse Determination by any person or persons shall be a defense to Indemnitee’s claim or create a presumption that Indemnitee did not meet the applicable standard of conduct, and any Proceeding
commenced by Indemnitee pursuant to Section 5(f), other than one to enforce a Favorable Determination, shall be de novo with respect to all determinations of fact and law. 

  
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 6. Directors and Officers Liability Insurance. 

(a) Maintenance of Insurance. So long as any of the Companies or any of their subsidiaries maintains directors and officers liability
insurance for any managers, directors, officers, employees or agents of any such person, the Companies shall ensure that Indemnitee is covered by such insurance in such a manner as to provide Indemnitee the same rights and benefits as are accorded
to the most favorably insured of the Companies’ and their subsidiaries’ then current managers, directors and officers. If at any time (i) such insurance ceases to cover acts and omissions occurring during all or any part of the
period of Indemnitee’s Corporate Status or (ii) none of the Companies nor any of their subsidiaries maintains any such insurance, the Companies shall ensure that Indemnitee is covered, for at least six years (or such shorter period
as is available on commercially reasonable terms) from such time, by other directors and officers liability insurance, in amounts and on terms (including the portion of the period of Indemnitee’s Corporate Status covered) no less favorable to
Indemnitee than the amounts and terms of the liability insurance maintained on the date hereof. 
 (b) Notice to Insurers. Upon
receipt of notice of a Proceeding pursuant to Section 5(a), the Companies shall give or cause to be given prompt notice of such Proceeding to all insurers providing liability insurance in accordance with the procedures set forth in all
applicable or potentially applicable policies. The Companies shall thereafter take all necessary action to cause such insurers to pay all amounts payable in accordance with the terms of such policies. 

7. Exculpation, etc. 

(a) Limitation of Liability. If Indemnitee is, has been or in the future becomes a director of any of the Companies or any of their
subsidiaries, Indemnitee shall not be personally liable to any of the Companies or any such subsidiary or to the stockholders, members or partners of any of the Companies or any such subsidiary for monetary damages for breach of fiduciary duty as
a director; provided that the foregoing shall not eliminate or limit the liability of the Indemnitee (i) for any breach of the Indemnitee’s duty of loyalty to a Company or such a subsidiary or the stockholders, members
or partners thereof; (ii) for acts or omissions not in good faith or which involve intentional misconduct or a knowing violation of the law; (iii) under Section 174 of the DGCL or any similar provision of other
applicable corporations law; or (iv) for any transaction from which the Indemnitee derived an improper personal benefit, in each case, as determined by a final, non-appealable order of a court of
competent jurisdiction. If the DGCL or such other applicable law shall be amended to permit further elimination or limitation of the personal liability of directors or officers, then the liability of the Indemnitee shall, automatically, without any
further action, be eliminated or limited to the fullest extent permitted by the DGCL or such other applicable law as so amended. 
 (b)
Period of Limitations. No legal action shall be brought and no cause of action shall be asserted by or in the right of any of the Companies or any of their subsidiaries against Indemnitee or Indemnitee’s estate, spouses, heirs,
executors, personal or legal representatives, administrators or assigns after the expiration of two years from the date of accrual of such cause of action, and any claim or cause of action of any of the Companies or any of their subsidiaries shall
be extinguished and deemed released unless asserted by the timely filing of a legal action within such two-year period; provided that if any shorter period of limitations is otherwise applicable to
any such cause of action, such shorter period shall govern. 

  
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 8. Miscellaneous. 

(a) Non-Circumvention. None of the Companies shall seek or agree to any order of any court or
other governmental authority that would prohibit or otherwise interfere, and shall not take or fail to take any other action if such action or failure would reasonably be expected to have the effect of prohibiting or otherwise interfering, with the
performance of the Companies’ indemnification, advancement or other obligations under this Agreement. 
 (b) Severability. If
any provision or provisions of this Agreement shall be held to be invalid, illegal or unenforceable for any reason whatsoever: (i) the validity, legality and enforceability of the remaining provisions of this Agreement (including without
limitation, each portion of any section of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall not in any way be affected or impaired thereby and
shall remain enforceable to the fullest extent permitted by law; (ii) such provision or provisions shall be deemed reformed to the extent necessary to conform to applicable law and to give the maximum effect to the intent of the parties
hereto; and (iii) to the fullest extent possible, the provisions of this Agreement (including, without limitation, each portion of any section of this Agreement containing any such provision held to be invalid, illegal or unenforceable,
that is not itself invalid, illegal or unenforceable) shall be construed so as to give effect to the intent manifested thereby. 
 (c)
Notices. All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed duly given (i) on the date of delivery if delivered personally, or by electronic mail, upon confirmation
of receipt, (ii) on the first business day following the date of dispatch if delivered by a recognized next-day courier service or (iii) on the third business day following the
date of mailing if delivered by domestic registered or certified mail, properly addressed, or on the fifth business day following the date of mailing if sent by airmail from a country outside of North America, to Indemnitee at the address shown
on the signature page to this Agreement, to the Companies at the following address, or in either case as subsequently modified by written notice: 

Core & Main, Inc. 
 1830
Craig Park Court 
 St. Louis, MO 63146 

Attention: Mark G. Whittenburg, General Counsel and Secretary 

A copy of any notice or other communication given under this Agreement shall also be given to: 

Debevoise & Plimpton LLP 

919 Third Avenue 
 New York, NY
10022 
 Attention: Paul M. Rodel 

E-mail: pmrodel@debevoise.com 

  
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 (d) Amendment and Termination. No amendment, modification, termination or
cancellation of this Agreement shall be effective unless it is in writing signed by all the parties hereto. No waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provisions hereof
(whether or not similar), nor shall such waiver constitute a continuing waiver. 
 (e) Successors and Assigns. This Agreement
(i) shall be binding upon the parties hereto and their respective successors and assigns (including any direct or indirect successor by purchase, merger, consolidation or otherwise to all or substantially all of the business or assets of
any of the Companies), (ii) shall inure to the benefit of and be enforceable by (A) the parties hereto, (B) any such successors and assigns, (C) any heirs, executors, devisees, administrators and other
legal representatives of Indemnitee and (D) to the extent provided in Section 3(d) above, any express third party beneficiary hereof and (iii) shall continue as to Indemnitee after he or she has ceased to be a director,
officer, employee or agent of the Companies. 
 (f) Choice of Law; Consent to Jurisdiction. This Agreement shall be governed by and
its provisions construed in accordance with the laws of Delaware, as applied to contracts between Delaware residents entered into and to be performed entirely within Delaware, without regard to the conflict of law principles thereof. The Companies
and Indemnitee each hereby irrevocably consents to the jurisdiction of the courts of the State of Delaware for all purposes in connection with any Proceeding which arises out of or relates to this Agreement and agree that any action instituted under
this Agreement shall be brought only in the courts of the State of Delaware. 
 (g) Integration and Entire Agreement. This Agreement
sets forth the entire understanding between the parties hereto and supersedes and merges all previous written and oral negotiations, commitments, understandings and agreements relating to the subject matter hereof between the parties hereto;
provided that the provisions hereof shall not supersede the provisions of certificate of incorporation, limited partnership or formation, bylaws, limited liability company agreement, limited partnership agreement or other organizational
agreement or instrument of the Companies and their subsidiaries, any agreement, any vote of members, managers, stockholders, partners or directors or any applicable law, to the extent any such provisions shall be more favorable to Indemnitee than
the provisions hereof. 
 (h) Counterparts. This Agreement may be executed in one or more counterparts (including facsimile or .pdf
counterparts), each of which shall constitute an original. 
 [The remainder of this page has been left blank intentionally.] 

  
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 IN WITNESS WHEREOF, the parties hereto have executed this Agreement as of the date first
above written. 
  

			
	CORE & MAIN, INC.
		
	By:	 	 
		 	Name:
		 	Title:
	
	CORE & MAIN HOLDINGS, LP
		
	By:	 	 
		 	Name:
		 	Title:
	
	CORE & MAIN LP
		
	By:	 	 
		 	Name:
		 	Title:

			
	AGREED TO AND ACCEPTED:
	
	INDEMNITEE:
		
	By:	 	 
		 	Name:
		
	Address:EX-10.14

 Exhibit 10.14 

AMENDED AND RESTATED CORE & MAIN HOLDINGS, LP 

EQUITY INCENTIVE PLAN 

Article I 
 Purpose 

Core & Main Holdings, LP has established this Plan (formerly known as the Core & Main LP Equity Incentive Plan), to foster
and promote its long-term financial success. Capitalized terms have the meaning given in Article XII. 
 Article II 

Powers of the General Partners 

Section 2.1 Power to Grant Awards. The General Partners may select Eligible Persons to participate in the Plan. The General
Partners shall determine the terms of each Award, consistent with the Plan. Subject to Article VIII, a maximum of 7,895,652 Common Units, Profits Units, Options and Stock Appreciation Rights will be available for issuance under the Plan. 

Section 2.2 Administration. The General Partners shall be responsible for the administration of the Plan. The General Partners may
prescribe, amend and rescind rules and regulations relating to the administration of the Plan, provide for conditions and assurances they deems necessary or advisable to protect the interests of the Partnership and make all other determinations
necessary or advisable for the administration and interpretation of the Plan. Any authority exercised by the General Partners under the Plan shall be exercised by the General Partners in their sole discretion. Determinations, interpretations or
other actions made or taken by the General Partners under the Plan shall be final, binding and conclusive for all purposes and upon all Persons. 

Section 2.3 Delegation by the General Partners. Pursuant to the Partnership Agreement, the General Partners have delegated all of
their powers, duties and responsibilities to the Board of the Partnership (the “Board”), and, accordingly, any determination, interpretation or other action taken by the Board shall be conclusively deemed to be an act of the General
Partners for all purposes under the Plan and with respect to all Awards granted under the Plan; provided, that nothing in the Plan shall be construed as prohibiting the General Partners from acting under the Plan directly (i.e., other than
through the Board of Directors of the Partnership). The Board may further delegate all of its powers, duties and responsibilities under the Plan to any duly constituted committee of members of the Board or other individuals authorized by the General
Partners or the Board to exercise and perform such powers, duties and responsibilities, and any determination, interpretation or other action taken by such committee or individuals shall have the same effect hereunder as if made or taken by the
General Partners. 

 Article III 

Common Units 

Section 3.1 Awards and Administration. The General Partners may cause the Partnership to issue Common Units to Participants or to
or to Management LLC at such time or times as it shall determine, the terms and conditions of the acquisition, holding and disposition of which shall be set forth in a Subscription Agreement approved by the General Partners (which, if applicable,
may also be the Award Agreement in use with respect to Profits Units and which may include terms relating to the effect of Competitive Activity by a Participant). Common Units issued under the Plan shall be subject to the terms and conditions of the
Partnership Agreement as in effect from time to time. If determined by the General Partners to be necessary or appropriate, any acquisition of Common Units by any Participant may be effected by the acquisition of an equal number of Common Units of
Management LLC. 
 Section 3.2 Minimum Consideration for Common Units. Unless otherwise determined by the General Partners, the
consideration to be paid or delivered for any Common Units to be issued pursuant to this Section 3.2 shall not be less than the Fair Market Value on the Grant Date. 

Section 3.3 Payment. Unless otherwise determined by the General Partners, the consideration to be paid or delivered with respect
to any Common Units issued pursuant to this Section 3.3 shall be paid in cash or other readily available funds simultaneously with the closing of the purchase of such Common Units. 

Article IV 
 Profits Units

 Section 4.1 Grant of Profits Units. The General Partners may grant Profits Units to Eligible Persons or to Management LLC
at such time or times as it shall determine. Each Profits Unit granted to a Participant or to Management LLC shall be evidenced by an Award Agreement that shall specify the number of Profits Units granted and such other terms as the General Partners
shall determine (including, but not limited to, terms relating to the effect of Competitive Activity 

  
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by a Participant). All grants of Profits Units shall be made in accordance with, and the terms of the Profits Units shall be subject to, the Partnership Agreement as in effect from time to time
and the Award Agreement evidencing such Profits Units. As a condition to the grant of Profits Units, a Participant shall make an election under section 83(b) of the Code with respect to such Profits Units. If determined by the General Partners to be
necessary or appropriate, any acquisition of Profits Units by any Participant may be effected by the acquisition of an equal number of Profits Units of Management LLC. 

Section 4.2 Status as Partnership Profits Interests. Unless otherwise determined by the General Partners on or before the Grant
Date, each Profits Unit is intended to be a partnership profits interest for U.S. federal income tax purposes, and, if and to the extent necessary to effect such status, a Benchmark Amount shall be assigned to the Profits Units. 

Section 4.3 Vesting of Profits Units. Profits Units shall become vested in accordance with such vesting schedule or upon the
attainment of such performance criteria as shall be specified by the General Partners on or before the Grant Date. Unless otherwise determined by the General Partners on or before the Grant Date or thereafter in a manner more favorable to the
Participant, the Profits Units shall vest in five substantially equal installments on the first through fifth anniversaries of the date of grant. The General Partners may accelerate the vesting of any Profits Unit, all Profits Units or any class of
Profits Units at any time and from time to time. Profits Units (whether or not vested) may not be sold, transferred, pledged, assigned or otherwise alienated or hypothecated other than as permitted by the General Partners. 

Article V 
 Unit Options

 Section 5.1 Grant of Options. The General Partners may select Eligible Persons to receive Options at such time or times
as they shall determine. Options granted pursuant to the Plan will not be “incentive stock options” as defined in the Code. Each Option granted to a Participant shall be evidenced by an Award Agreement that shall specify the number of
Common Units that may be purchased pursuant to such Option, the exercise price at which Common Units may be purchased pursuant to such Option, the duration of such Option (not to exceed the tenth anniversary of the Grant Date), and such other terms
as the General Partners shall determine (including, but not limited to, requiring a Participant to agree to certain restrictive covenants regarding competition against the Partnership and its Affiliates or solicitation of their respective clients or
employees). 

  
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 Section 5.2 Exercise Price. The exercise price per Common Unit to be purchased
upon exercise of an Option shall not be less than the Fair Market Value of such Common Unit on the Grant Date. 
 Section 5.3
Vesting and Exercise of Options. Options shall become vested or exercisable in accordance with the vesting schedule or upon the attainment of such performance criteria as shall be specified by the General Partners on or before the Grant Date.
Unless otherwise determined by the General Partners on or before the Grant Date, or thereafter in a manner more favorable to the Participant, one fifth of the Options shall vest and become exercisable subject to continued employment on each of the
first, second, third, fourth and fifth anniversaries of the Grant Date. The General Partners may accelerate the vesting or exercisability of any Option, all Options or any class of Options at any time and from time to time. 

Section 5.4 Payment. The General Partners shall establish procedures governing the exercise of Options, which procedures shall,
unless the General Partners determine otherwise and/or as otherwise specified in an Award Agreement, generally require that prior written notice of exercise be given and that the exercise price (together with any required withholding taxes or other
similar taxes, charges or fees) be paid in full (i) in cash, cash equivalents or other readily-available funds at the time of exercise or (ii) if so provided in an Award Agreement, at the Participant’s written request,
by cancellation of all or a portion of the Options (to the extent then exercisable), and, in consideration of such cancellation, the Partnership shall retain (i.e., not issue) a number of Common Units (the “Unissued Option
Units”) that have an aggregate Fair Market Value as of the date of cancellation equal to the aggregate Option exercise price of the portion of the Options so cancelled (it being understood that if a Participant elects to exercise Options in
the manner set forth in this clause (ii), the Partnership shall issue to the Participant a number of Common Units equal to the portion of the Options so cancelled minus the number of Unissued Option Units); provided that, in the case of each
of clause (i) and clause (ii), the Participant shall pay any required withholding taxes or other similar taxes, charges or fees to the Partnership in cash or cash equivalents at the time of exercise. Notwithstanding the foregoing, on such terms
as the General Partners may establish from time to time following an IPO, the General Partners may authorize the Partnership to establish a broker-assisted exercise program or other method of exercise of the Options without cash outlay by a
Participant. In connection with any Option exercise, the Partnership may require the Participant to furnish or execute such other documents as it shall reasonably deem necessary to (a) evidence such exercise, (b) determine
whether registration is then required under the U.S. federal securities laws or similar non-U.S. laws or (c) comply with or satisfy the requirements of the U.S. federal securities laws, applicable
state or non-U.S. securities laws or any other law. As a condition to the exercise of any Option before an IPO, a Participant shall enter into a Subscription Agreement in the form then customarily used by the
Partnership. 

  
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 Article VI 

Unit Appreciation Rights 

Section 6.1 Grant of Unit Appreciation Rights. The General Partners may select Eligible Persons to receive Unit Appreciation
Rights at such time or times as they shall determine. Each Unit Appreciation Right granted to a Participant shall be evidenced by an Award Agreement that shall specify the number of Unit Appreciation Rights that may be exercised, their exercise
price and their duration (not to exceed the tenth anniversary of the Grant Date), and such other terms as the General Partners shall determine in their discretion, consistent with the Plan (including, but not limited to, requiring a Participant to
agree to certain restrictive covenants regarding Competitive Activity). 
 Section 6.2 Vesting and Exercise of Unit Appreciation
Rights. Unit Appreciation Rights shall become vested or exercisable in accordance with the vesting schedule or upon the attainment of such performance criteria as shall be specified by the General Partners in the Award Agreement on or before the
Grant Date. Unless otherwise determined by the General Partners on or before the Grant Date, or thereafter in a manner more favorable to the Participant, one fifth of the Options shall vest and become exercisable subject to continued employment on
each of the first, second, third, fourth and fifth anniversaries of the Grant Date. The General Partners may accelerate the vesting or exercisability of any Unit Appreciation Right or all Unit Appreciation Rights at any time and from time to time.

 Section 6.3 Payment. The General Partners shall establish procedures governing the exercise and settlement of Unit
Appreciation Rights, which procedures shall generally require that prior written notice of exercise be given and that any required withholding taxes or other similar taxes be satisfied. In connection with any Unit Appreciation Right exercise, the
Partnership may require the Participant to furnish or execute such other documents as it shall reasonably deem necessary to evidence such exercise. Unless otherwise determined by the General Partners, upon exercise of a Unit Appreciation Right, the
Participant shall be entitled to receive payment in the form, determined by the General Partners, of Common Units or cash, or a combination of Common Units and cash having an aggregate value equal to the amount determined by multiplying: 

  
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 (i) any increase in the Fair Market Value of one Common Unit on the exercise
date over the Base Price of such Unit Appreciation Right, by 
 (ii) the number of Common Units with respect to which such
Unit Appreciation Right is exercised; 
 If so required by the General Partners, a Participant exercising Unit Appreciation Rights for cash may be required
to invest the cash received upon exercise (after reduction for any required withholding taxes or other similar taxes) in Common Units of Management LLC. 

Article VII 
 Termination of
Employment 
 Section 7.1 Effect of Termination of Employment on Profits Units, Options and Unit Appreciation Rights. Unless
otherwise determined by the General Partners on or before the Grant Date or thereafter in a manner more favorable to the Participant, if a Participant’s employment with the Partnership terminates, all of such Participant’s (i) Profits
Units (or, if applicable, the Profits Units issued to Management LLC in respect of such Participant), (ii) Options and (iii) Unit Appreciation Rights shall be treated as follows: 

(a) if the Participant’s employment terminates as a result of the Participant’s death or Disability, all of such
Participant’s unvested Profits Units, Options and Unit Appreciation Rights shall become fully and immediately vested upon such termination of employment; 

(b) except as provided in Section 7.1(a), any unvested Profits Units, Options and Unit Appreciation Rights shall be
automatically forfeited and canceled immediately upon such termination of employment; 
 (c) except in the case of a
termination for Cause, vested Profits Units, Options and Unit Appreciation Rights shall remain outstanding and shall remain subject to the terms of the Partnership Agreement and the Award Agreement; and 

(d) in the case of a termination for Cause, any and all Profits Units, Options and Unit Appreciation Rights held by such
Participant or, if applicable, by Management LLC in respect of such Participant (whether or not then vested) shall be automatically forfeited and canceled immediately upon such termination of employment. 

  
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 Section 7.2 Call Rights upon Termination of Employment. Each Subscription
Agreement shall provide that the Partnership and the Investor shall have successive rights prior to an IPO to purchase all or any portion of a Participant’s Units (and, if applicable, the Units issued to Management LLC in respect of such
Participant) upon a termination of employment of the Participant for a purchase price per Unit equal to the Fair Market Value as of the “Determination Date” specified in the Subscription Agreement (or as to Common Units, if such
termination is for Cause, for the lesser of (i) the Fair Market Value as of the “Determination Date” specified in the Subscription Agreement and (ii) the price at which the Participant purchased such Common Unit
from the Partnership). For the avoidance of doubt, if the purchase price for a Unit as determined according to this Section 7.2 is less than or equal to zero, then the Unit shall be forfeited to the Partnership without any payment to the
Participant. Without limiting the generality of this Section 7.2 or of the administrative powers of the General Partners or their delegate hereunder, the Partnership may require, as a condition to the sale or grant of any Unit under the Plan,
that (i) the Participant (or, if applicable, Management LLC in respect of such Participant) provide the Partnership or its designee(s) with powers of attorney to effect such repurchase and (ii) the Participant’s spouse
execute and deliver a form of spousal waiver with respect to any Units sold or granted to the Participant. 
 Article VIII 

Adjustment upon Change in Capitalization 

Section 8.1 Generally. If and to the extent necessary or appropriate to reflect any extraordinary dividend, split or combination
or any recapitalization, merger, consolidation, exchange of equity interests, spin-off, liquidation or dissolution of the Partnership or other similar transaction affecting the equity interests of the
Partnership, including an IPO and any reorganization transactions that occur in connection with an IPO, the General Partners shall adjust the number of Profits Units, Options and Unit Appreciation Rights available for issuance under the Plan and the
number and class of outstanding Awards of Profits Units, Options and Unit Appreciation Rights, and/or make such substitution, revision or other provisions or take such other actions with respect to any outstanding Award of Profits Units, Options and
Unit Appreciation Rights or the holder or holders thereof, in each case as they reasonably determines to be equitable. Without limiting the generality of the foregoing sentence, in the event of any such transaction, the General Partners shall have
the power to make such changes as they reasonably deem appropriate in the number and type of equity interests covered by outstanding Awards of Profits Units, Options and Unit Appreciation Rights, the prices, exercise prices and/or Benchmark Amounts
specified therein (if 

  
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applicable), and the securities, cash or other property to be received upon the exercise, settlement, conversion or repurchase of such Profits Units, Options and Unit Appreciation Rights or
otherwise to be received in connection with such outstanding Awards. In addition and without limiting the generality of the foregoing, in the event of a merger transaction in which consideration other than cash will be paid to the holders of Common
Units, each outstanding Profits Unit, Option and Unit Appreciation Right (and/or successor equity interests) shall be treated as provided for in the agreement and plan of merger entered into by parties to such transaction. After any adjustment made
pursuant to this Article VIII, the number of Profits Units, Options, Unit Appreciation Rights or other equity interests subject to each outstanding Award of Profits Units, Options and Unit Appreciation Rights shall be rounded down to the nearest
whole number. Any action taken pursuant to this Article VIII shall be effected in a manner that is exempt from or otherwise complies with Section 409A of the Code. 

Section 8.2 IPO Restructuring. Without limiting the generality of Section 8.1, in connection with an IPO, the General
Partners may, in their discretion, cause (x) outstanding Common Units to be exchanged for shares of the stock of the public company, (y) outstanding Profits Units to be converted into shares of the stock of the public company
and/or other equity interests with substantially equivalent rights (as reasonably determined by the General Partners), excluding tax treatment and option value and (z) Options and Unit Appreciation Rights to be converted into equity
interests of the public company with substantially equivalent rights (as reasonably determined by the General Partners), excluding option value (including, in the case of Unit Appreciation Rights, by providing that, following the IPO, the Unit
Appreciation Rights shall be exercisable solely for stock of the public company). Alternatively, the General Partners may determine to keep any of the Common Units, Profits Units, Options and Unit Appreciation Rights outstanding, in whole or in
part. In addition, the General Partners may make such modifications to the Plan and to outstanding Awards as they determine in their sole discretion to be necessary or appropriate to the extent that the Awards will relate to stock of the public
company following the IPO (including, without limitation, the definition of “Change in Control” herein and adding the holdback provision set forth in Section 8.3). 

Section 8.3 IPO Holdback. Without limiting Section 8.2, if a registration statement is filed under the Securities Act with
respect to an underwritten public offering of any shares of capital stock of a successor corporation to the Partnership (or another wholly-owned subsidiary of the Partnership or a successor thereto), the General Partners may modify the Plan and
outstanding Awards to provide that no Participant shall effect any public sale (including a sale under Rule 144 under the Securities Act or other similar provision of applicable law) or distribution of any

  
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common stock of such entity, other than as part of such underwritten public offering, during the 20 days prior to and the 180 days after the effective date of such registration statement (or such
other period as may be generally applicable to or agreed by the entity’s senior-most executives). If such entity files a prospectus in connection with a takedown from a shelf registration statement, no Participant shall effect any public sale
(including a sale under Rule 144 under the Securities Act or other similar provision of applicable law) or distribution of any common stock of such entity, other than as part of such offering, for 20 days prior to and 90 days after the date the
prospectus supplement is filed with the Securities and Exchange Commission (or such other period as may be generally applicable to or agreed by the entity’s senior-most executives). 

Article IX 
 Change in Control

 Section 9.1 Accelerated Vesting. Subject to this Article IX, and unless otherwise provided in an Award Agreement, in the
event of a Change in Control, all then-outstanding Awards that are then unvested shall immediately become fully vested. 
 Section 9.2
Form of Consideration. Notwithstanding any provision of this Plan to the contrary, except for Awards replaced with Alternative Awards, the form or timing of all or any part of the consideration to be paid in respect of an Award under
Section 9.1 in connection with a Change in Control may be different than the form or timing of consideration received by the Investors (to the extent permitted under Section 409A of the Code), so long as the value of the Change in Control
Price applied to such Award, as determined by the General Partners in their sole discretion, is at least equal to the Change in Control Price paid to the Investors. Subject to the preceding sentence, the General Partners may, in their sole
discretion, pay different forms of consideration in respect of different Awards (including in respect of the vested portion or unvested portion of Awards) and/or Awards held by different Participants. 

Section 9.3 Alternative Award. No cancellation, acceleration of vesting or other payment shall occur with respect to any Award if
the General Partners reasonably determine in good faith, prior to the occurrence of a Change in Control, that such Award shall be honored or assumed, or new rights substituted therefor following the Change in Control (such honored, assumed or
substituted award, an “Alternative Award”), provided that any Alternative Award must: 
 (a) give the
Participant who held such Award rights and entitlements substantially equivalent to or better than the rights and terms applicable under such Award, including, but not limited to, an identical or better exercise and vesting schedule, and identical
or better timing and methods of payment; and 

  
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 (b) have terms such that if a Participant’s employment is involuntarily
(i.e., by the Partnership or its successor other than for Cause) or constructively (i.e., by the Participant with “good reason”, which, for a Participant who is a party to an employment agreement that contains such term,
shall be as defined in such employment agreement, and, for a Participant who is not a party to an employment agreement containing such term, shall be determined by the General Partners prior to the Change in Control so as to be reasonably protective
of the Participant in light of the circumstances of the particular transaction) terminated within two years following a Change in Control at a time when any portion of the Alternative Award is unvested, the unvested portion of such Alternative Award
shall immediately vest in full and such Participant shall receive either (1) a cash payment equal in value to the excess (if any) of the fair market value of the equity interests subject to the Alternative Award at the date of exercise or
settlement (as determined in good faith by the board of directors of the issuer of the Alternative Award) over the price (if any) that such Participant would be required to pay to exercise such Alternative Award or (2) publicly-traded shares or
equity interests equal in value equal to the value in clause (1); 
 and provided, further, that, in the event of a Change in Control in which
the consideration received by the Investors consists solely of cash, Alternative Awards may not be substituted for vested Profits Units or vested Unit Appreciation Rights without the consent of the holder of such Units. 

Section 9.4 Any Alternative Award shall either be exempt from, or shall comply with, Section 409A of the Code. 

Article X 
 Authority to Vary
Terms or Establish Local Jurisdiction Plans 
 The General Partners may vary the terms of Awards under the Plan, or establish sub-plans under the Plan to authorize the grant of awards that have additional or different terms or features from those otherwise provided for in the Plan, if and to the extent the General Partners determine
necessary or appropriate to permit the grant of awards that are best suited to further the purposes of the Plan and to comply with applicable securities laws in a particular jurisdiction or provide terms appropriately suited for Participants in such
jurisdiction in light of the tax laws of such jurisdiction while being as consistent as otherwise possible with the terms of Awards under the Plan; provided that this Article X shall not be deemed to authorize any increase in the number of
Units set forth in Sections 3.1 and 4.1 as available for issuance under the Plan. 

  
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 Article XI 

Amendment, Modification, and Termination of the Plan 

The General Partners may terminate or suspend the Plan at any time, and may amend or modify the Plan from time to time. No amendment,
modification, termination or suspension of the Plan shall have a material adverse effect on the economic terms of any Award theretofore granted under the Plan without the consent of the Participant holding such Award or the consent of a majority in
interest of Participants holding similar Awards (such majority in interest to be determined based on the number of Units covered by such Awards). Approval of the Plan by holders of equity interests in the Partnership or of any such amendment,
modification, termination or suspension shall be obtained to the extent mandated by applicable law, or if otherwise required or deemed appropriate by the General Partners. 

Article XII 
 Definitions

 Section 12.1 Definitions. Whenever used herein, the following terms shall have the respective meanings set forth below:

 “Affiliate” has the meaning given in the Partnership Agreement. 

“Alternative Award” has the meaning given in Section 9.3. 

“Award” shall mean the issuance of Common Units pursuant to Article III or the grant of any Profits Unit,
Option or Unit Appreciation Right, in each case issued on or following the Effective Date pursuant to the terms of the Plan. 

“Award Agreement” means a Subscription Agreement or any other agreement evidencing an Award. 

“Benchmark Amount” means an amount necessary to effect the limitation on distributions set forth in
Section 2.1(b) of the Partnership Agreement. 

  
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 “Board” has the meaning given in Section 2.3. 

“Change in Control” means: 

(a) the acquisition (including by merger) after the Effective Date by any person, entity or “group” (as defined in
Section 13(d) of the Exchange Act) after which acquisition such person, entity or group owns more than 50% of the equity interests of the Partnership’s then outstanding equity interests, other than any such acquisition by the Partnership,
any of its Subsidiaries, any employee benefit plan of the Partnership or any of its Subsidiaries, or by any of the Investors (including any “group” (within the meaning of Section 13(d)(3) or 14(d)(2) of the Exchange Act) of which any
Investor is a member, or any Affiliates of any of the foregoing; or 
 (b) the sale, transfer or other disposition of all or
substantially all of the assets of the Partnership to one or more persons or entities that are not, immediately prior to such sale, transfer or other disposition, Affiliates of the Partnership 

Notwithstanding the foregoing, neither (i) an IPO nor (ii) the reorganization transactions pursuant to that certain
Contribution and Subscription Agreement dated as of August 5, 2019, by and among the Partnership, Management LLC, CD&R Plumb Buyer, LLC, Core & Main GP, LLC, Core & Main Midco, LLC and Core & Main Intermediate GP,
LLC shall constitute a Change in Control. 
 “Change in Control Price” means the price per Common Unit paid
in conjunction with any transaction resulting in a Change in Control; provided that if any part of this price is payable other than in cash, is payable on a deferred basis (e.g., installments) or subject to performance or other
conditions (e.g., an earnout), the Change in Control Price payable in respect of one or more Awards shall be determined in good faith by the General Partners as constituted immediately prior to the Change in Control and the General Partners
may, in their sole discretion, pay the Change in Control Price at different times or under different conditions. 

“Cause” shall, as to any Participant, have the meaning set forth in the employment or services agreement to
which the Participant is a party with the Partnership or an Affiliate, or, in the absence of such an employment or services agreement, shall mean any of the following: (i) the Participant’s commission of a crime involving fraud,
theft, false statements or other similar acts or commission of any crime that is a felony (or a comparable classification in a jurisdiction that does not use these terms); 

  
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(ii) the Participant’s willful or grossly negligent failure to perform his or her employment-related duties for the Partnership and its Subsidiaries; (iii) the
Participant’s material breach of any Award Agreement, employment agreement without the definition of “cause”, or noncompetition, nondisclosure or nonsolicitation agreement to which the Participant is a party or by which the
Participant is bound or (iv) the Participant’s engaging in any conduct injurious or detrimental to the Partnership or any of its Subsidiaries that causes material harm thereto, including material harm to the reputation of the
Partnership or any of its Subsidiaries. The determination as to whether “Cause” has occurred shall be made by the Partnership, which shall have the authority to waive the consequences under the Plan of the existence or occurrence of
any of the events, acts or omissions constituting “Cause.” 
 “Code” means the United States
Internal Revenue Code of 1986, as amended, and any successor thereto. 
 “Common Units” means the Common
Units of the Partnership and, if applicable, any securities which may be issued after the Effective Date in respect of, or in exchange for, the Common Units (which are sometimes referred to herein as “successor equity interests”). 

“Competitive Activity” with respect to a Participant means the General Partner’s determination, made
reasonably and in good faith, that the Participant, directly or indirectly, has engaged in a material breach of any agreement to which the Participant and the Partnership or any of its Affiliates are parties (including but not limited to any Award
Agreement) that prohibits or otherwise limits or conditions actions of the Participant related to competition; interference with key business relationships; solicitation of customers or employees; disclosure of confidential information; ownership of
intellectual property; disparagement; and other similar activities. 
 “Disability” means, unless otherwise
provided in an Award Agreement, a Participant’s long-term disability within the meaning of the long-term disability insurance plan or program of the Partnership or any Subsidiary then covering the Participant, or in the absence of such a plan
or program, as determined by the General Partners. The General Partners’ reasoned and good faith judgment of Disability shall be final and shall be based on such competent medical evidence as shall be presented to them by the Participant or by
any physician or group of physicians or other competent medical expert employed by the Participant or the Partnership to advise the General Partners. 

  
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 “Effective Date” has the meaning given in
Section 13.10. 
 “Eligible Person” means any executive, officer or other employee of, non-employee director of, or independent contractor to, the General Partners, the Partnership or any Subsidiary or Affiliate of the Partnership (irrespective of whether such individual is treated as a partner for
tax purposes). 
 “Fair Market Value” with respect to a Unit means, as of any date of determination prior to
an IPO, the fair market value of such Unit under the Partnership Agreement, as determined by the General Partners in their sole discretion. 

“General Partners” means the General Partners of the Partnership or, to the extent that a delegation to a
committee has occurred as provided in Section 2.3, such committee (to the extent of such delegation). 
 “Grant
Date” means, with respect to any Award, the date as of which such Award is granted pursuant to the Plan. 

“Investors” means, collectively, the “CD&R Investors” (as defined in the Partnership
Agreement). 
 “IPO” has the meaning given in the Partnership Agreement. 

“Management LLC” means Core & Main Management Feeder, LLC, a Delaware limited liability company, and
any successor thereto. To the extent necessary for any purpose, this Plan shall also be deemed to be the equity incentive plan of Management LLC with respect to the Common Units and Profits Units issued by Management LLC to Eligible Persons (other
than Management LLC). 
 “Option” means an option to purchase Common Units subject to the terms of the Plan.

 “Participant” means (i) any Eligible Person who is granted an Award and
(ii) Management LLC, an entity that, following the Effective Date, owns and/or will own Common Units and Profits Units and the equity interests in which are held and/or will be held by Eligible Persons. 

  
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 “Partnership” means Core & Main Holdings, LP, a
Delaware limited partnership, and any successor thereto; provided that for purposes of determining the status of a Participant’s employment with the “Partnership,” such term shall include the Partnership, its Subsidiaries and
Affiliates. 
 “Partnership Agreement” means the Agreement of Limited Partnership of Core & Main
Holdings, LP dated as of August 5, 2019 and as amended from time to time. 
 “Person” means any
natural person, firm, partnership, limited liability company, association, corporation, company, trust, business trust, governmental authority or other entity. 

“Plan” means this Core & Main Holdings, LP Equity Incentive Plan, as amended from time to time. 

“Profits Units” means the Profits Units (as defined in the Partnership Agreement) subject to the terms of the
Plan and, if applicable, any securities which may be issued after the Effective Date in respect of, or in exchange for, the Profits Units (which are sometimes referred to herein as “successor equity interests”). 

“Restriction Period” means the period during which any Profits Units are subject to forfeiture pursuant to the
terms of the Plan. 
 “Securities Act” means the Securities Act of 1933, as amended, and the rules and
regulations promulgated thereunder. 
 “Subscription Agreement” means a subscription agreement between or
among the Partnership, Management LLC (if applicable) and a Participant embodying the terms of any acquisition of Common Units and any corresponding equity interests in Management LLC and, if applicable, any grant of Profits Units and any
corresponding equity interests in Management LLC made pursuant to the Plan and in the form approved by the General Partners from time to time for such purpose. 

“Subsidiary” has the meaning given in the Partnership Agreement. 

“Unit Appreciation Right” means the right to receive a payment from the Partnership in cash and/or Common
Units equal to the product of (i) the excess, if any, of the Fair Market Value of one Common Unit on the exercise date over a specified price (the “Base Price”) fixed by the General Partners on the Grant Date (which
specified price shall not be less than the Fair Market Value of one Unit on the Grant Date), multiplied by (ii) a number of Units stated in the Award Agreement. 

  
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 “Units” means Common Units (including successor equity
interests) and Profits Units (including successor equity interests). 
 Section 12.2 Rules of Construction. 

(a) Gender and Number. Except when otherwise indicated by the context, words in the masculine gender used in the Plan
shall include the feminine gender, the singular shall include the plural, and the plural shall include the singular. 
 (b)
Use of the term “Employ”. The phrase “employee”, “employment with the Partnership” and corollary terms used herein and in an Award Agreement (x) with respect to an employee shall
be construed to refer to the employment with the Partnership and/or the Subsidiaries or Affiliates of the Partnership that actually employ the employee, and (y) with respect to a director or independent contractor shall be construed to
refer to whichever of the Partnership and/or the Subsidiaries or Affiliates of the Partnership to which the director or independent contractor actually provides services. 

(c) Termination of Employment. It shall be condition of each Award under the Plan that the date of termination of a
Participant’s employment shall be determined without regard to any statutory or deemed or express contractual notice period, unless otherwise required by law. 

(d) “Participant” Status. For purposes of this Plan, an Eligible Person who holds equity
interests in Management LLC that correspond to Common Units or Profits Units granted by the Partnership to Management LLC shall be deemed a Participant for the substantive provisions of this Plan (including those relating to termination of
employment) notwithstanding that such Eligible Person may not hold Common Units or Profits Units directly. 
 (e)
Overriding Effect of the Partnership Agreement and Award or Other Agreements. If there is any inconsistency between any express term of the Plan, on the one hand, and any express term of the Partnership Agreement, on the other hand, the terms
of the Partnership Agreement shall govern. In addition, if there is any inconsistency between any express term of the Plan and/or the Partnership Agreement, on the one hand, and any express term of any Award Agreement or other agreement to which a
Participant and the Partnership or any of its Affiliates are parties, on the other hand, such Award Agreement or other agreement shall govern. 

  
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 Article XIII 

Miscellaneous Provisions 

Section 13.1 Nontransferability of Awards. Except as otherwise provided herein, in an Award Agreement, in the Partnership
Agreement or as the General Partners may permit on such terms as they shall determine, no Awards granted under the Plan may be sold, transferred, pledged, assigned, hedged, encumbered or otherwise alienated or hypothecated, other than by will or by
the laws of descent and distribution. All rights with respect to Awards granted to a Participant under the Plan shall be exercisable during the Participant’s lifetime by such Participant only (or, in the event of the Participant’s
Disability, such Participant’s legal representative). Following a Participant’s death, all rights with respect to Awards that were outstanding at the time of such Participant’s death and have not terminated shall be exercised by his
designated beneficiary or by his estate in the absence of a designated beneficiary. 
 Section 13.2 Tax Withholding. The
Partnership or the Subsidiary employing a Participant shall have the power to withhold up to the maximum statutory requirement, or to require such Participant to remit to the Partnership or such Subsidiary, an amount sufficient to satisfy all U.S.
federal, state, local and any non-U.S. withholding tax and other governmental tax, charge or fee requirements in respect of any Award granted under the Plan (excluding, where applicable, the employer portion
of any employment, social or similar taxes). 
 Section 13.3 Beneficiary Designation. Pursuant to such rules and procedures as
the General Partners may from time to time establish, a Participant may name a beneficiary or beneficiaries (who may be named contingently or successively) by whom any right under the Plan is to be exercised in case of such Participant’s death.
Each designation will revoke all prior designations by the same Participant, shall be in a form reasonably prescribed by the General Partners, and will be effective only when filed by the Participant in writing with the General Partners during his
lifetime. 
 Section 13.4 No Guarantee of Employment or Participation. Nothing in the Plan or in any Award Agreement shall
interfere with or limit in any way the right of the Partnership or any Subsidiary to terminate any Participant’s employment or retention at any time, or confer upon any Participant any right to continue in the employ or retention of the
Partnership or any Subsidiary. No individual shall have a right to be selected as a Participant or, having been so selected, to receive any other or future Awards. 

  
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 Section 13.5 No Limitation on Compensation; No Impact on Benefits. Nothing in
the Plan shall be construed to limit the right of the Partnership or any Subsidiary to establish other plans or to pay compensation to its employees, in cash or property, in a manner that is not expressly authorized under the Plan. Except as may
otherwise be specifically and unequivocally stated under any employee benefit plan, policy or program, no amount payable in respect of any Award shall be treated as compensation for purposes of calculating a Participant’s rights under any such
plan, policy or program. The selection of an Eligible Person as a Participant shall neither entitle such Eligible Person to, nor disqualify such Eligible Person from, participation in any other award or incentive plan. 

Section 13.6 Voting Rights. Units shall have such voting rights as provided in the Partnership Agreement. Common Units and Profits
Units of Management LLC shall be non-voting. 
 Section 13.7 Requirements of Law. The
granting of Awards and the issuance of Units pursuant to the Plan shall be subject to all applicable laws, rules and regulations, and to such approvals by any governmental agencies or national securities exchanges as may be required. No Awards shall
be granted under the Plan, and no Units shall be sold or issued under the Plan, if such grant, sale or issuance would result in a violation of applicable law, including U.S. federal securities laws and any applicable state or non-U.S. securities laws. 
 Section 13.8 Freedom of Action. Nothing in the Plan or any Award
Agreement evidencing an Award shall be construed as limiting or preventing the Partnership or any Subsidiary from taking any action that it deems appropriate or in its best interest (as determined in its sole and absolute discretion) and no
Participant (or person claiming by or through a Participant) shall have any right relating to the diminishment in the value of any Award as a result of any such action. This Section 13.8 shall not be construed to enlarge the rights of the
Partnership or the General Partners hereunder with respect to the interpretation or administration of the Plan or any Award Agreements. 

Section 13.9 Unfunded Plan; Plan Not Subject to ERISA. The plan is an unfunded plan and Participants shall have the status of
unsecured creditors of the Partnership. The Plan is not intended to be subject to the Employee Retirement Income and Security Act of 1974, as amended. 

  
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 Section 13.10 Term of Plan. The Plan shall be effective as of January 1,
2018 (the “Effective Date”) and shall continue in effect, unless sooner terminated pursuant to Article X, until the tenth anniversary of such date. The provisions of the Plan shall continue thereafter to govern all outstanding
Awards (which Awards, for clarity, shall not be terminated). 
 Section 13.11 Governing Law. The Plan, and all agreements
hereunder, shall be governed by and construed in accordance with the law of the State of Delaware regardless of the application of rules of conflict of law that would apply the laws of any other jurisdiction. 

Section 13.12 Section 409A of the Code. The Plan and the Award Agreements entered into pursuant to the Plan are
intended to be exempt from or comply with the requirements of Section 409A of the Code and shall be construed and interpreted in accordance with such intent. In no event shall any provision of the Plan be construed as an indemnification of a
Participant by the Partnership in the event that the additional taxes under Section 409A of the Code apply to Awards granted hereunder. 

  
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