Brightview Holdings Inc — Additional Proxy Materials (DEFA14A)

Signature of Stockholder Date: Signature of Stockholder Date: Note: Please sign exactly as your name or names appear on this Proxy. When shares are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the signer is a corporation, please sign full corporate name by duly authorized officer, giving full title as such. If signer is a partnership, please sign in partnership name by authorized person. To change the address on your account, please check the box at right and indicate your new address in the address space above. Please note that changes to the registered name(s) on the account may not be submitted via this method. INSTRUCTIONS: To withhold authority to vote for any individual nominee(s), mark “FOR ALL EXCEPT” and fill in the circle next to each nominee you wish to withhold, as shown here: JOHN SMITH 1234 MAIN STREET APT. 203 NEW YORK, NY 10038 PROXY VOTING INSTRUCTIONS Please detach along perforated line and mail in the envelope provided IF you are not voting via telephone or the Internet. THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR ALL NOMINEES" IN THE ELECTION OF THE DIRECTOR NOMINEES AND “FOR” PROPOSAL 2. PLEASE SIGN, DATE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE. PLEASE MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE x 20730000000000000000 5 030326 COMPANY NUMBER ACCOUNT NUMBER NOTICE OF INTERNET AVAILABILITY OF PROXY MATERIAL: The Notice of Meeting, proxy statement and proxy card are available at - www.astproxyportal.com/ast/22221 ANNUAL MEETING OF STOCKHOLDERS OF BRIGHTVIEW HOLDINGS, INC. Tuesday, March 3, 2026, at 11:00 AM Eastern Time 1. Election of Directors: O James R. Abrahamson O Dale A. Asplund O Jane Okun Bomba O William Cornog O Frank Lopez O Paul E. Raether O Mara Swan FOR ALL NOMINEES WITHHOLD AUTHORITY FOR ALL NOMINEES FOR ALL EXCEPT (See instructions below) NOMINEES: INTERNET - Access www.voteproxy.com and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. TELEPHONE - Call toll-free 1-800-PROXIES (1-800-776-9437) in the United States or +1-201-299-4446 from outside the US from any touch-tone telephone and follow the instructions. Have your proxy card avail-able when you call. Vote online/phone until 11:59 PM Eastern Time the day before the meeting. VIRTUALLY AT THE MEETING - The company will be hosting the meeting live via the Internet. To attend the meeting via the Internet, please visit https://meetings.lumiconnect.com/200-807-773-025 (password: brightview2026) and be sure to have your control number available. GO GREEN - e-Consent makes it easy to go paperless. With e-Consent, you can quickly access your proxy material, statements and other eligible docu-ments online, while reducing costs, clutter and paper waste. Enroll today via equiniti.com/us/ast-access to enjoy online access. 2. To ratify the appointment of Deloitte & Touche LLP as BrightView Holdings, Inc.’s independent registered public accounting firm for Fiscal 2026. NOTE: To transact such other business as may properly come before the meeting or any adjournments or postponements of the Annual Meeting. FOR AGAINST ABSTAIN CONTROL NUMBER

1. Election of Directors: James R. Abrahamson Dale A. Asplund Jane Okun Bomba William Cornog Frank Lopez Paul E. Raether Mara Swan 2. To ratify the appointment of Deloitte & Touche LLP as BrightView Holdings, Inc.’s inde-pendent registered public accounting firm for Fiscal 2026. NOTE: To transact such other business as may properly come before the meeting or any adjournments or postponements of the Annual Meeting THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE ELECTION OF EACH OF THE DIRECTOR NOMINEES AND “FOR” PROPOSAL 2. NOMINEES: This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. If you want to receive a paper or e-mail copy of the proxy materials you must request one. There is no charge to you for requesting a copy. To facilitate timely delivery please make the request as instructed below before February 17, 2026. You will be able to request a list of stockholders of record during the Annual Meeting. Please visit www.astproxyportal.com/ast/22221, where the following materials are available for view: • Notice of Annual Meeting of Stockholders • Proxy Statement • Form of Electronic Proxy Card • Annual Report on Form 10-K TO REQUEST MATERIAL: TELEPHONE: 1-888-Proxy-NA (888-776-9962) or +1-201-299-6210 (worldwide) E-MAIL: help@equiniti.com WEBSITE: us.astfinancial.com/OnlineProxyVoting/ProxyVoting/RequestMaterials TO VOTE: ONLINE: To access your online proxy card, please visit www.voteproxy.com and follow the on-screen instructions or scan the QR code with your smartphone. You may enter your voting instructions at www.voteproxy.com up until 11:59 PM Eastern Time the day before the cut-off or meeting date. VIRTUALLY AT THE MEETING - The company will be hosting the meeting live via the Internet. To attend the meeting via the Internet, please visit https://meetings.lumiconnect.com/200-807-773-025 (password:brightview2026) and be sure to have your control number available. TELEPHONE: To vote by telephone, please visit www.voteproxy.com to view the materials and to obtain the toll free num-ber to call. MAIL: You may request a card by following the instructions above. COMPANY NUMBER ACCOUNT NUMBER CONTROL NUMBER JOHN SMITH 1234 MAIN STREET APT. 203 NEW YORK, NY 10038 Please note that you cannot use this notice to vote by mail. Important Notice of Availability of Proxy Materials for the Stockholder Meeting of BRIGHTVIEW HOLDINGS, INC. To Be Held On: Tuesday, March 3, 2026, at 11:00 AM Eastern Time at https://meetings.lumiconnect.com/200-807-773-025, password: brightview2026

Signature of Stockholder Date: Signature of Stockholder Date: Note: Please sign exactly as your name or names appear on this Proxy. When shares are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the signer is a corporation, please sign full corporate name by duly authorized officer, giving full title as such. If signer is a partnership, please sign in partnership name by authorized person. To change the address on your account, please check the box at right and indicate your new address in the address space above. Please note that changes to the registered name(s) on the account may not be submitted via this method. INSTRUCTIONS: To withhold authority to vote for any individual nominee(s), mark “FOR ALL EXCEPT” and fill in the circle next to each nominee you wish to withhold, as shown here: JOHN SMITH 1234 MAIN STREET APT. 203 NEW YORK, NY 10038 PROXY VOTING INSTRUCTIONS Please detach along perforated line and mail in the envelope provided IF you are not voting via telephone or the Internet. THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR ALL NOMINEES" IN THE ELECTION OF THE DIRECTOR NOMINEES AND “FOR” PROPOSAL 2. PLEASE SIGN, DATE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE. PLEASE MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE x 20930000000000000000 3 030326 COMPANY NUMBER ACCOUNT NUMBER NOTICE OF INTERNET AVAILABILITY OF PROXY MATERIAL: The Notice of Meeting, proxy statement and proxy card are available at - www.astproxyportal.com/ast/27507 ANNUAL MEETING OF STOCKHOLDERS OF BRIGHTVIEW HOLDINGS, INC. Tuesday, March 3, 2026, at 11:00 AM Eastern Time 1. Election of Directors: O James R. Abrahamson O Dale A. Asplund O Jane Okun Bomba O William Cornog O Frank Lopez O Paul E. Raether O Mara Swan O Kurtis Barker O Joshua Goldman FOR ALL NOMINEES WITHHOLD AUTHORITY FOR ALL NOMINEES FOR ALL EXCEPT (See instructions below) NOMINEES: INTERNET - Access www.voteproxy.com and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. TELEPHONE - Call toll-free 1-800-PROXIES (1-800-776-9437) in the United States or +1-201-299-4446 from outside the US from any touch-tone telephone and follow the instructions. Have your proxy card available when you call. Vote online/phone until 11:59 PM Eastern Time the day before the meeting. VIRTUALLY AT THE MEETING - The company will be hosting the meeting live via the Internet. To attend the meeting via the Internet, please visit https://meetings.lumiconnect.com/200-807-773-025 (password: brightview2026) and be sure to have your control number available. GO GREEN - e-Consent makes it easy to go paperless. With e-Consent, you can quickly access your proxy material, statements and other eligible documents online, while reducing costs, clutter and paper waste. Enroll today via equiniti.com/us/ast-access to enjoy online access. 2. To ratify the appointment of Deloitte & Touche LLP as BrightView Holdings, Inc.’s independent registered public accounting firm for Fiscal 2026. NOTE: To transact such other business as may properly come before the meeting or any adjournments or postponements of the Annual Meeting. FOR AGAINST ABSTAIN CONTROL NUMBER

1. Election of Directors: James R. Abrahamson Dale A. Asplund Jane Okun Bomba William Cornog Frank Lopez Paul E. Raether Mara Swan Kurtis Barker Joshua Goldman 2. To ratify the appointment of Deloitte & Touche LLP as BrightView Holdings, Inc.’s inde-pendent registered public accounting firm for Fiscal 2026. NOTE: To transact such other business as may properly come before the meeting or any adjournments or postponements of the Annual Meeting. THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" THE ELECTION OF EACH OF THE DIRECTOR NOMINEES AND “FOR” PROPOSAL 2. NOMINEES: This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting. If you want to receive a paper or e-mail copy of the proxy materials you must request one. There is no charge to you for requesting a copy. To facilitate timely delivery please make the request as instructed below before February 17, 2026. You will be able to request a list of stockholders of record during the Annual Meeting. Please visit www.astproxyportal.com/ast/27507, where the following materials are available for view: • Notice of Annual Meeting of Stockholders • Proxy Statement • Form of Electronic Proxy Card • Annual Report on Form 10-K TO REQUEST MATERIAL: TELEPHONE: 1-888-Proxy-NA (888-776-9962) or +1-201-299-6210 (worldwide) E-MAIL: help@equiniti.com WEBSITE: us.astfinancial.com/OnlineProxyVoting/ProxyVoting/RequestMaterials TO VOTE: ONLINE: To access your online proxy card, please visit www.voteproxy.com and follow the on-screen instructions or scan the QR code with your smartphone. You may enter your voting instructions at www.voteproxy.com up until 11:59 PM Eastern Time the day before the cut-off or meeting date. VIRTUALLY AT THE MEETING - The company will be hosting the meeting live via the Internet. To attend the meeting via the Internet, please visit https://meetings.lumiconnect.com/200-807-773-025 (password:brightview2026) and be sure to have your control number available. TELEPHONE: To vote by telephone, please visit www.voteproxy.com to view the materials and to obtain the toll free num-ber to call. MAIL: You may request a card by following the instructions above. COMPANY NUMBER ACCOUNT NUMBER CONTROL NUMBER JOHN SMITH 1234 MAIN STREET APT. 203 NEW YORK, NY 10038 Please note that you cannot use this notice to vote by mail. Important Notice of Availability of Proxy Materials for the Stockholder Meeting of BRIGHTVIEW HOLDINGS, INC. To Be Held On: Tuesday, March 3, 2026, at 11:00 AM Eastern Time at https://meetings.lumiconnect.com/200-807-773-025, password: brightview2026