In order to simplify the proxy process for our shareholders and streamline our communications efforts, Pinnacle West has opted to take advantage of new Securities and Exchange Commission rules allowing us to provide proxy materials to investors via the Internet. This new procedure allows us to provide our shareholders with the information they require in a timely fashion, while also helping us operate more efficiently and save paper. Shareholders will receive a notice and instructions describing how to access the proxy materials and vote. To receive future proxy notices electronically or to review your proxy materials and vote, select the appropriate link below.

Beneficial Shareholders

You are a Beneficial Shareholder if you maintain your position in the Company with a brokerage firm, bank trustee or other agent.

• Click here to review your proxy materials and to vote on-line as a beneficial shareholder. You may also choose this link to consent to electronic delivery of future proxy notices (link hosted by Broadridge).

Registered Shareholders

You are a Registered Shareholder if you have your stock certificate in your possession or your shares are registered directly in your name with our transfer agent, BNY Mellon Shareowner Services.

• Click here to review your proxy materials and to vote on-line as a registered shareholder. You may also choose this link to consent to electronic delivery of future proxy notices (link hosted by BNY Mellon Shareowner Services).

401(k) Holders

You are a 401 (k) Holder if you own stock through the Pinnacle West Capital Corporation Savings Plan.

• Click here to review your proxy materials and to vote on-line as a registered shareholder. You may also choose this link to consent to electronic delivery of future proxy notices (link hosted by BNY Mellon Shareowner Services).