TopBuild (BLD) DEFA14AAdditional proxy soliciting materials

Your Vote Counts! TOPBUILD CORP. 475 NORTH WILLIAMSON BOULEVARD DAYTONA BEACH, FL 32114 TOPBUILD CORP. 2023 Annual Meeting Vote by April 30, 2023 11:59 PM ET You invested in TOPBUILD CORP. and it’s time to vote! You have the right to vote on proposals being presented at the Annual Meeting. This is an important notice regarding the availability of proxy material for the shareholder meeting to be held on May 1, 2023. Vote Virtually at the Meeting* May 1, 2023 10:00 AM EDT Virtually at: www.virtualshareholdermeeting.com/BLD2023 *Please check the meeting materials for any special requirements for meeting attendance. Smartphone users Point your camera here and vote without entering a control number V1.1 For complete information and to vote, visit www.ProxyVote.com Control # D96491-P85698-Z84230 Get informed before you vote View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to April 17, 2023. If you would like to request a copy of the material(s) for this and/or future shareholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

THIS IS NOT A VOTABLE BALLOT This is an overview of the proposals being presented at the upcoming shareholder meeting. Please follow the instructions on the reverse side to vote these important matters. Vote at www.ProxyVote.com Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click “Sign up for E-delivery”. Voting Items Board Recommends D96492-P85698-Z84230 1. Election of Directors Nominees: 1c. Robert M. Buck 1a. Alec C. Covington 1d. Joseph S. Cantie 1b. Ernesto Bautista, III 1e. Tina M. Donikowski 1f. Deirdre C. Drake 1g. Mark A. Petrarca 1h. Nancy M. Taylor 2. To ratify the Company’s appointment of PricewaterhouseCoopers LLP to serve as the Company’s independent registered public accounting firm for the Company’s fiscal year ending December 31, 2023; and 3. To approve, on an advisory basis, the compensation of the Company’s named executive officers. NOTE: In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the Annual Meeting and any adjournments or postponements thereof. This proxy, when properly executed, will be voted in the manner directed herein by the undersigned shareholder. If no direction is made, this proxy will be voted “FOR” the election of the nominees for Director named in Proposal 1 in this proxy card and “FOR” Proposals 2 and 3. For For For For For For For For For For

Signature [PLEASE SIGN WITHIN BOX] Date Signature (Joint Owners) Date TO VOTE, MARK BLOCKS BELOW IN BLUE OR BLACK INK AS FOLLOWS: KEEP THIS PORTION FOR YOUR RECORDS DETACH AND RETURN THIS PORTION ONLY THIS PROXY CARD IS VALID ONLY WHEN SIGNED AND DATED. D96485-P85698-Z84230 1b. Ernesto Bautista, III Nominees: 1a. Alec C. Covington 1e. Tina M. Donikowski 1c. Robert M. Buck 1d. Joseph S. Cantie 1h. Nancy M. Taylor Please sign exactly as your name(s) appear(s) hereon. When signing as attorney, executor, administrator, or other fiduciary, please give full title as such. Joint owners should each sign personally. All holders must sign. If a corporation or partnership, please sign in full corporate or partnership name by authorized officer. 1f. Deirdre C. Drake 1g. Mark A. Petrarca The Board of Directors recommends you vote FOR proposals 2 and 3. 3. To approve, on an advisory basis, the compensation of the Company's named executive officers. 2. To r a t i f y t h e C o m p a n y ' s a p p o i n t m e n t o f PricewaterhouseCoopers LLP to serve as the Company's independent registered public accounting firm for the Company's fiscal year ending December 31, 2023; and NOTE: In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the Annual Meeting and any adjournments or postponements thereof. This proxy, when properly executed, will be voted in the manner directed herein by the undersigned shareholder. If no direction is made, this proxy will be voted “FOR” the election of the nominees for Director named in Proposal 1 in this proxy card and “FOR” Proposals 2 and 3. 1. Election of Directors For Against Abstain For Against Abstain ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! TOPBUILD CORP. The Board of Directors recommends you vote FOR the following: TOPBUILD CORP. 475 NORTH WILLIAMSON BOULEVARD DAYTONA BEACH, FL 32114 VOTE BY INTERNET Before The Meeting - Go to www.proxyvote.com or scan the QR Barcode above Use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 p.m. Eastern Time the day before the meeting date. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. During The Meeting - Go to www.virtualshareholdermeeting.com/BLD2023 You may attend the meeting via the Internet and vote during the meeting. Have the information that is printed in the box marked by the arrow available and follow the instructions. VOTE BY PHONE - 1-800-690-6903 Use any touch-tone telephone to transmit your voting instructions up until 11:59 p.m. Eastern Time the day before the meeting date. Have your proxy card in hand when you call and then follow the instructions. VOTE BY MAIL Mark, sign and date your proxy card and return it in the postage-paid envelope we have provided or return it to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, NY 11717. SCAN TO VIEW MATERIALS & VOTEw

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting: The Notice and Proxy Statement and Annual Report are available at www.proxyvote.com. D96486-P85698-Z84230 PROXY TOPBUILD CORP. THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS The undersigned hereby appoints Luis F. Machado and Robert M. Buck as Proxies, each with the power to appoint his substitute, and hereby authorizes them to represent and to vote, as designated on the reverse side, all the shares of the Common Stock of TopBuild Corp. held of record by the undersigned on March 2, 2023 at the Annual Meeting of Shareholders to be held on May 1, 2023 and any adjournment or postponements thereof. The shares represented by this proxy, when properly executed and returned, will be voted as directed herein. IF THIS PROXY IS DULY EXECUTED AND RETURNED, AND NO VOTING DIRECTIONS ARE GIVEN HEREIN, SUCH SHARES WILL BE VOTED “FOR” THE ELECTION OF THE NOMINEES FOR DIRECTOR NAMED IN PROPOSAL 1 IN THIS PROXY CARD AND “FOR” PROPOSALS 2 AND 3. The undersigned hereby acknowledges receipt of notice of, and the proxy statement for, the aforesaid Annual Meeting of Shareholders. Continued and to be signed on reverse side