PNW · Pinnacle West Capital Corp

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the last business day of the month following the month in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the last business day of the month following the month in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the second anniversary in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the last business day of the month following the month in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the last business day of the month following the month in which the reporting person separates from service from the Company.

Each Stock Unit is the economic equivalent of one share of Pinnacle West common stock. The Stock Units vested on May 14, 2026 and will be settled in shares of common stock. The reporting person elected to defer settlement until the last business day of the month following the month in which the reporting person separates from service from the Company.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

The reporting person gifted the shares received on March 18, 2026 to a revocable family trust.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

The reporting person gifted the shares received on March 18, 2026 to a revocable family trust.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Shares retained by the Company for the purpose of meeting tax withholding requirements. The recipient retained all other shares.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Represents the cash settlement of performance shares received in connection with the settlement of dividend equivalent rights.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Shares acquired upon the vesting of the performance shares granted in 2023 that were tied to the following: total shareholder return performance; earnings per share growth; clean megawatts installed metrics; and performance shares received in connection with dividend equivalent rights.

Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The number of derivative securities in Column 5 includes 20 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

The Restricted Stock Units award was granted and was effective in February 2025, and vests in four equal, annual installments beginning on February 20, 2026.

Includes 60 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.

Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's Common Stock. The Restricted Stock Units will be settled in 100% shares of common stock.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The reporting person gifted the shares received on February 20, 2026 to a revocable family trust.

Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights

Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The number of derivative securities in Column 5 includes 361 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

The Restricted Stock Units award was granted and was effective in February 2022, and vests in four equal, annual installments beginning on February 20, 2023.

Shares retained by the Company for purpose of meeting tax withholding requirements. The recipient retained all other shares.

Represents the cash settlement of Restricted Stock Units received in connection with the settlement of dividend equivalent rights.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The number of derivative securities in Column 5 includes 191 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

The Restricted Stock Units award was granted and was effective in February 2024, and vests in four equal, annual installments beginning on February 20, 2025.

Includes 382 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's common stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The number of derivative securities in Column 5 includes 96 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

The Restricted Stock Units award was granted and was effective in April 2025, and vests in four equal, annual installments beginning on February 20, 2026.

The number of derivative securities in Column 5 includes 283 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

Each Restricted Stock Unit represents a contingent right to receive the economic equivalent of one share of the Company's Common Stock. The Restricted Stock Units will be settled in 100% shares of common stock.

The number of derivative securities in Column 5 includes 12 vested Restricted Stock Units received in connection with the settlement of dividend equivalent rights. Dividend equivalent rights accrue with respect to these Restricted Stock Units when and as cash dividends are paid on the Company's common stock.

The Restricted Stock Units award was granted effective February 2025, and vests in four equal, annual installments beginning February 20, 2026.

Includes 33 Restricted Stock Units received in connection with the settlement of dividend equivalent rights.