Williams Files Prospectus Supplement for Up to 26.9 Million Common Stock Resales

The Williams Companies, Inc. filed a prospectus supplement on September 3, 2026, regarding the resale of its common stock by selling securityholders. The filing updates an existing effective shelf registration statement on Form S-3 (File No. 333-277232).

The document permits the resale of up to 26,874,496 shares of the Company’s common stock. These shares have a par value of $1.00 per share and are registered under the Securities Act of 1933.

The filing includes an opinion from Davis Polk & Wardwell LLP regarding the validity of the shares. The opinion is attached as Exhibit 5.1 to the report.