Form of proxy Please date and sign this form of proxy and return it in the enclosed envelope addressed to Algonquin Power & Utilities Corp., c/o TSX Trust Company, Proxy Department, P.O. Box 721, Agincourt, Ontario, Canada M1S 0A1, so that it is received before 1:00 p.m. (Eastern Time) on Friday, May 31, 2024. In the alternative, you may deliver it by electronic mail (scan both sides) to proxyvote@tmx.com, from a touch-tone telephone by calling 1-888-489-5760, or by facsimile (fax both sides) to 416-595-9593, or on the internet by visiting www.meeting-vote.com by not later than 1:00 p.m. (Eastern Time) on Friday, May 31, 2024. The undersigned common shareholder of Algonquin Power & Utilities Corp. (the “Corporation”) hereby appoints Christopher Huskilson, Interim Chief Executive Officer of the Corporation, or, failing him, Darren Myers, Chief Financial Officer of the Corporation, or instead of either of them, (NAME OF PROXYHOLDER) as proxy of the undersigned, with full power of substitution, to attend and vote at the annual meeting (the “Meeting”) of common shareholders of the Corporation to be held at 1:00 p.m. (Eastern Time) on Tuesday, June 4, 2024 at the Royal Bank Plaza, North Tower, 200 Bay Street, Suite 1600, Toronto, ON M5J 2J3, and at any adjournment or postponement thereof, upon the following matters: 1. Melissa S. Barnes 2. Brett C. Carter 3. Amee Chande 4. Daniel S. Goldberg 5. Christopher G. Huskilson 6. D. Randall Laney 7. David Levenson 8. Christopher F. Lopez 9. Dilek Samil VOTE FOR or WITHHOLD VOTE or, if no specification is made, VOTE FOR the appointment of Ernst & Young LLP, Chartered Accountants, as auditor of the Corporation for the ensuing year; With respect to the election of the following nominees as directors of the Corporation as set out in the Corporation’s management information circular (the “Circular”) dated April 18, 2024: Name VOTE FOR VOTE AGAINST or, if no specification is made, VOTE FOR the election of each of the foregoing nominees; VOTE FOR or VOTE AGAINST the resolution set out on page 14 of the Circular approving amendments to the Performance and Restricted Share Unit Plan for Employees of Algonquin Power & Utilities Corp. and its Participating Affiliates, including an increase in the number of common shares reserved for issuance from treasury under such plan; VOTE FOR or VOTE AGAINST the resolution set out on page 15 of the Circular approving an amendment to the Corporation’s Employee Share Purchase Plan to increase the number of common shares reserved for issuance from treasury under such plan; VOTE FOR or VOTE AGAINST the resolution set out on page 16 of the Circular approving an amendment to the Directors’ Deferred Share Unit Plan to increase the number of common shares reserved for issuance from treasury under such plan; VOTE FOR or VOTE AGAINST the advisory resolution set out on page 17 of the Circular approving the Corporation’s approach to executive compensation as disclosed in the Circular; and Amendments or variations to the matters identified in the notice of meeting accompanying the Circular (the “Notice of Meeting”) and such other business as may properly come before the Meeting or any adjournment or postponement thereof at the discretion of the proxyholder.