Pinnacle West Capital Files $500M Equity Distribution Agreement

What Happened

• On August 4, 2026, Pinnacle West Capital Corporation announced an Equity Distribution Agreement with a group of banks and broker-dealers to offer and sell up to $500,000,000 of its common stock. Sales may be made "at the market" (ATM) through the NYSE, market makers, electronic networks, or by privately negotiated transactions, and the company also may enter into forward sale agreements tied to the program.

Key Details

• Agreement date: August 4, 2026; aggregate authorization up to $500,000,000 of common stock.
• Managers/participants include major banks and broker-dealers acting as managers, forward purchasers and forward sellers; managers earn up to 1% commission on gross sales.
• Forward sale feature: the company may enter forward sale agreements where forward purchasers borrow shares (via forward sellers) and the company expects to physically settle those forwards by delivering newly issued shares on or before the forward maturity to receive net cash proceeds. Forward settlement price is adjusted daily by a floating interest factor and reduced for expected dividends; cash or net-share settlement options could result in the company owing cash or shares.
• Use of proceeds: investment in Arizona Public Service Company for capital expenditures, repayment of commercial paper for Pinnacle West or APS, and general corporate purposes.
• The offering is registered on Form S-3 (Reg. No. 333-277448) and supplemented by a Prospectus Supplement dated August 4, 2026. The company is not required to sell any shares and may suspend or terminate the program at any time.

Why It Matters

• This filing establishes a flexible way for Pinnacle West to raise up to $500 million of equity capital over time, either immediately via ATM sales or later via forward agreements. For investors, the program can dilute existing shares if and when the company issues and sells shares, but it also provides Pinnacle West a ready source of capital to fund APS capital needs and manage short-term borrowing (commercial paper), which may reduce near-term liquidity risk. The company’s ability to suspend or not utilize the program limits commitment to immediate dilution.