EDISON INTERNATIONAL — Capital/Financing Update 2026

May 5, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 30, 2026

EDISON INTERNATIONAL

(Exact name of registrant as specified in its charter)

​	​	​
California	001-9936	95-4137452
(State or other jurisdiction	(Commission	(I.R.S. Employer
of incorporation)	File Number)	Identification No.)

2244 Walnut Grove Avenue

( P.O. Box 976 )

Rosemead , California 91770

(Address of principal executive offices, including zip code)

( 626 ) 302-2222

(Registrant's telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

[ ☐ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

[ ☐ ] Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

[ ☐ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

[ ☐ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

​	​	​	​
Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, no par value	EIX	NYSE	LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events

On April 30, 2026 , Edison International agreed to sell $500,000,000 principal amount of its 5.00 % Senior Notes, due 2028 (the “Notes”).

For further information concerning the Notes, refer to the exhibits attached to this report.

Item 9.01 Financial Statements and Exhibits

(d) Exhibits

See the Exhibit Index below.

EXHIBIT INDEX

​	​
​	​
Exhibit No.	​ ​ ​	Description
​	​	​
1.1	​	Underwriting Agreement dated April 30, 2026
​	​	​
4.1	​	Sixteenth Supplemental Indenture dated May 5, 2026, including the Form of 5.00% Senior Notes due 2028
​	​	​
5.1	​	Opinion of Michael A. Henry dated May 5, 2026
​	​	​
104	​	Cover Page Interactive Data File (embedded within the Inline XBRL document)
​	​	​

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

​	​
​	EDISON INTERNATIONAL
​	(Registrant)
​	​
​	/s/ Kara G. Ryan
​	Kara G. Ryan
​	Vice President, Chief Accounting Officer and Controller

Date: May 5, 2026