PINNACLE WEST CAPITAL CORP 8-K

What Happened Pinnacle West Capital Corporation filed an 8-K on June 5, 2026, announcing a First Amendment to its Equity Distribution Agreement (an "at‑the‑market" or ATM facility) with several dealers and forward purchasers, including Barclays, BofA, J.P. Morgan and others. The amendment extends the outside maturity period for forward sale agreements from 18 months to 24 months. The amendment did not change the $900 million aggregate cap, the parties, commission rates, or other agreement terms.

Key Details

• Amendment date: June 5, 2026.
• Aggregate ATM capacity: up to $900,000,000 (unchanged).
• Sold through June 5, 2026: approximately $630 million of shares.
• Remaining capacity under the agreement: approximately $270 million.
• Registration: Shares are offered under the Company’s Form S-3 (Reg. No. 333-277448) and a prospectus supplement dated June 5, 2026.

Why It Matters Extending the forward sale outside maturity to 24 months gives Pinnacle West more time flexibility when using forward sale structures tied to the ATM program, which can help manage timing and execution of future share issuances. For investors, the filing signals that up to about $270 million of ATM capacity remains available and that future sales under this program could increase share supply (dilution) if used. The amendment does not change the total amount the company may sell or other financial terms. Investors should watch future ATM activity and company disclosures about how proceeds will be used.