EIX Edison International

Filed Pursuant to Rule 424(b)(5)
Registration No. 333-281010

The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying base prospectus are not an offer to sell nor do they seek an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED OCTOBER 31, 2024

PROSPECTUS SUPPLEMENT

(To Prospectus dated July 25, 2024)

Edison International

$     % Senior Notes Due 20

We are offering $    principal amount of our  % Senior Notes due 20  . The notes will bear interest at the rate of  % per year. Interest on the notes is payable semi-annually on March 15 and September 15 of each year, beginning on March 15, 2025 (short first interest period). The notes will mature on March 15, 20  .

We may at our option redeem some or all of the notes at any time at the redemption price discussed under the caption “Certain Terms of the Notes—Optional Redemption.” The notes will be unsecured obligations and will rank equally with all of our other unsecured and unsubordinated indebtedness from time to time outstanding.

Investing in the notes involves risks. See “Risk Factors” beginning on page S-6 and the risk factors included in our Annual Report on Form 10-K for the year ended December 31, 2023 and our Quarterly Report on Form 10-Q for the quarter ended September 30, 2024.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the related prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

Interest on the notes will accrue from November  , 2024.

The notes are expected to be delivered in global form through the book-entry delivery system of The Depository Trust Company for the accounts of its participants, including Clearstream Banking, S.A., and Euroclear Bank SA/NV, on or about November  , 2024.

Joint Book-Running Managers

October  , 2024

We are responsible for the information contained and incorporated by reference in this prospectus supplement and the accompanying base prospectus and in any related free writing prospectus that we prepare or authorize. We have not, and the underwriters have not, authorized anyone to provide you with any other information, and we and the underwriters take no responsibility for any other information that others may provide you. Neither we nor the underwriters are making an offer to sell the notes in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus supplement, the accompanying base prospectus, any such free writing prospectus and the documents incorporated by reference herein and therein is accurate only as of their respective dates. Our business, financial condition, results of operations and prospects may have changed since those dates.

TABLE OF CONTENTS

Prospectus Supplement

Prospectus

ABOUT THIS PROSPECTUS SUPPLEMENT

This document is in two parts. The first part is this prospectus supplement, which describes the specific terms of the notes we are offering and certain other matters about us and our financial condition. The second part, the accompanying base prospectus, provides general information about the debt securities that we may offer from time to time, some of which may not apply to the notes we are offering hereby. Generally, when we refer to the prospectus, we are referring to both this prospectus supplement and the accompanying base prospectus. If the description of the notes varies between this prospectus supplement and the accompanying base prospectus, you should rely on the information in this prospectus supplement. References in this prospectus to “Edison International,” “we,” “us,” and “our” mean Edison International on a stand-alone basis, not consolidated with its subsidiaries.

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FORWARD-LOOKING STATEMENTS

This prospectus and the documents they incorporate by reference contain “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements reflect our current expectations and projections about future events based on our knowledge of present facts and circumstances and assumptions about future events and include any statement that does not directly relate to a historical or current fact. In this prospectus and elsewhere, the words “expects,” “believes,” “anticipates,” “estimates,” “projects,” “intends,” “plans,” “probable,” “may,” “will,” “could,” “would,” “should,” and variations of such words and similar expressions, or discussions of strategy or of plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. Some of the risks, uncertainties and other important factors that could cause results to differ from those currently expected, or that otherwise could impact us and our subsidiaries, include, but are not limited to:

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Additional information about risks and uncertainties that could cause results to differ from those currently expected or that otherwise could impact us, including more detail about the factors described above, is included in our Annual Report on Form 10-K for the year ended December 31, 2023, our Quarterly Reports on Form 10-Q, and our Current Reports on Form 8-K filed subsequent to that date. Forward-looking statements speak only as of the date they are made and we are not obligated to publicly update or revise forward-looking statements.

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EDISON INTERNATIONAL

Edison International is the parent holding company of Southern California Edison Company, a California public utility. Edison International also owns or holds interests in companies that are competitive businesses related to the generation or use of electricity. Based in Rosemead, California, Edison International was incorporated in California in 1987.

The mailing address and telephone number of our principal executive offices are P.O. Box 976, Rosemead, CA 91770 and (626) 302-2222.

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RISK FACTORS

Your decision whether or not to purchase any of the notes will involve some degree of risk. You should be aware of and carefully consider the following risk factors and the risk factors included in our Annual Report on Form 10-K for the year ended December 31, 2023 (which is incorporated by reference in this prospectus supplement and the related base prospectus). New risks may emerge at any time, and we cannot predict such risks or estimate the extent to which they may affect our financial performance. You should also read and consider all of the other information provided or incorporated by reference in this prospectus supplement and the related base prospectus before deciding whether or not to purchase any of the notes. See “Forward-Looking Statements” in this prospectus supplement and “Where You Can Find More Information” in the base prospectus.

You may be unable to sell your notes if a trading market for the notes does not develop.

The notes will be new securities for which there is currently no established trading market, and none may develop. We do not intend to apply for listing of the notes on any securities exchange or for quotation on any automated dealer quotation system. The liquidity of any market for the notes will depend on the number of holders of the notes, the interest of securities dealers in making a market in the notes, and other factors. Accordingly, we cannot assure you as to the development or liquidity of any market for the notes. If an active trading market does not develop, the market price and liquidity of the notes may be adversely affected. If the notes are traded, they may trade at a discount from their initial offering price depending upon prevailing interest rates, the market for similar securities, general economic conditions, our performance and business prospects, and certain other factors.

The notes are our obligations and not obligations of our subsidiaries and will be effectively subordinated to the claims of the subsidiaries’ creditors.

The notes are our obligations exclusively and not obligations of our subsidiaries. Because we are a holding company, our obligations under the notes will be structurally subordinated to all existing and future liabilities and preferred equity of our subsidiaries. Therefore, our creditors, including holders of the notes, will not have a direct right to participate in the assets of any subsidiary upon the liquidation or reorganization of the subsidiary. Instead, our creditors will participate in those assets only to the extent that we receive a distribution from the subsidiary on account of any claim or interest that we have against or in the subsidiary. At September 30, 2024, our subsidiaries had total consolidated liabilities of approximately $61.1 billion and preferred equity outstanding with a total liquidation value of approximately $2.5 billion.

We may be unable to meet our ongoing and future financial obligations if our subsidiaries are unable to pay dividends to us.

Our ability to meet our financial obligations is primarily dependent on the earnings and cash flows of our subsidiaries and their ability to pay dividends, make other distributions or repay funds owed from time to time to us. Prior to funding Edison International, our subsidiaries have financial and regulatory obligations that must be satisfied, including, among others, debt service and preferred stock dividends. The CPUC also regulates SCE’s capital structure and limits the dividends it may pay to us. In addition, the indenture under which the notes will be issued does not limit our ability, or the ability of our subsidiaries, to pledge shares of stock as security for other indebtedness.

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USE OF PROCEEDS

We intend to use the net proceeds from the offering of the notes for general corporate purposes.

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CERTAIN TERMS OF THE NOTES

The notes will be additional series of our debt securities issued under an indenture dated as of September 10, 2010 between Edison International, as issuer, and The Bank of New York Mellon Trust Company, N.A., as trustee.

The summary of selected provisions of the notes and the indenture referred to below supplements, and to the extent inconsistent supersedes and replaces, the description of the general terms and provisions of the debt securities and the indenture contained in the accompanying base prospectus. This summary is not complete and is qualified by reference to provisions of the notes and the indenture. Forms of the notes and the indenture have been or will be filed with the Securities and Exchange Commission and you may obtain copies as described under “Where You Can Find More Information” in the accompanying base prospectus.

Interest Rate and Maturity

The notes will bear interest at the rate of  % per year. Interest on the notes will be payable semi-annually in arrears on March 15 and September 15 of each year, beginning on March 15, 2025 (short first interest period), to the holders of record at the close of business on the business day immediately preceding the interest payment date so long as the notes remain in book-entry only form, or on the immediately preceding March 1 and September 1, respectively, if the notes do not remain in book-entry only form. See “—Book-Entry, Delivery and Form” below. Interest will be computed on the basis of a 360-day year consisting of twelve 30-day months; provided that the amount of interest payable for any period shorter or longer than a full interest period will be computed on the basis of a 360-day year consisting of twelve 30-day months and the actual number of days elapsed in the period using 30-day months.

The notes will mature on March 15, 20  . The notes are subject to earlier redemption at our option as described under “—Optional Redemption.”

If any interest payment date, redemption date or the maturity date of the notes is not a business day in any place of payment, then payment of the principal, premium, if any, and interest may be made on the next business day in that place of payment. In that case, no interest will accrue on the amount payable for the period from and after the applicable interest payment date, redemption date or maturity date, as the case may be. The regular record date for all payments of interest on the notes will be the first day of the month in which payment is to be made, whether or not such day is a business day.

We will pay interest on, principal of, and any premium on, the notes at stated maturity, upon redemption or otherwise, as described under “—Book-Entry, Delivery and Form.” The notes initially will be issued in book- entry form and represented by global securities deposited with, or on behalf of, The Depository Trust Company, as Depositary, and registered in the name of Cede & Co., its nominee. This means that you will not be entitled to receive a certificate for the notes that you purchase except in limited circumstances. If any of the notes are issued in certificated form they will be issued only in fully registered form without coupons, in denominations of $1,000 and integral multiples of $1,000.

Ranking

The notes will be our unsecured senior debt obligations and will rank on a parity in right of payment with all of our other unsecured and unsubordinated indebtedness. The notes are our obligations exclusively, and are not the obligations of any of our subsidiaries. Because we conduct our operations primarily through our subsidiaries and substantially all of our consolidated assets are held by our subsidiaries, the notes will be effectively subordinated to all existing and future liabilities (including indebtedness) and preferred equity of our subsidiaries. At September 30, 2024, our subsidiaries had total consolidated liabilities of approximately $61.1 billion, and preferred equity outstanding with a total liquidation value of approximately $2.5 billion. See “Description of the Debt Securities—Ranking—Holding Company Structure” in the accompanying base prospectus.

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Optional Redemption

We will be entitled to redeem the notes at our option as described below. You will not be permitted to require us to redeem or repurchase the notes at your option.

Prior to   15, 20   (the “Par Call Date”), we may redeem the notes at our option, in whole or in part, at any time and from time to time, at a “make-whole” redemption price (expressed as a percentage of principal amount and rounded to three decimal places) equal to the greater of:

(1) (a) the sum of the present values of the remaining scheduled payments of principal and interest thereon discounted to the redemption date (assuming the notes matured on the Par Call Date) on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the Treasury Rate plus  basis points less (b) interest accrued to the date of redemption, and

(2) 100% of the principal amount of the notes to be redeemed,

plus, in either case, accrued and unpaid interest thereon to but excluding the redemption date.

On or after the Par Call Date, we may redeem the notes, in whole or in part, at any time and from time to time, at a redemption price equal to 100% of the principal amount of the notes being redeemed plus accrued and unpaid interest thereon to but excluding the redemption date.

“Treasury Rate” means, with respect to any redemption date for the notes, the yield determined by us in accordance with the following two paragraphs.

The Treasury Rate shall be determined by us after 4:15 p.m., New York City time (or after such time as yields on U.S. government securities are posted daily by the Board of Governors of the Federal Reserve System), on the third business day preceding the redemption date based upon the yield or yields for the most recent day that appear after such time on such day in the most recent statistical release published by the Board of Governors of the Federal Reserve System designated as “Selected Interest Rates (Daily)—H.15” (or any successor designation or publication) (“H.15”) under the caption “U.S. government securities—Treasury constant maturities—Nominal” (or any successor caption or heading)(“H.15 TCM”). In determining the Treasury Rate, we shall select, as applicable: (1) the yield for the Treasury constant maturity on H.15 exactly equal to the period from the redemption date to the Par Call Date of the notes (the “Remaining Life”); or (2) if there is no such Treasury constant maturity on H.15 exactly equal to the Remaining Life, the two yields—one yield corresponding to the Treasury constant maturity on H.15 immediately shorter than and one yield corresponding to the Treasury constant maturity on H.15 immediately longer than the Remaining Life—and shall interpolate to the Par Call Date of the notes on a straight-line basis (using the actual number of days) using such yields and rounding the result to three decimal places; or (3) if there is no such Treasury constant maturity on H.15 shorter than or longer than the Remaining Life, the yield for the single Treasury constant maturity on H.15 closest to the Remaining Life. For purposes of this paragraph, the applicable Treasury constant maturity or maturities on H.15 shall be deemed to have a maturity date equal to the relevant number of months or years, as applicable, of such Treasury constant maturity from the redemption date.

If on the third business day preceding the redemption date H.15 TCM is no longer published, we shall calculate the Treasury Rate based on the rate per annum equal to the semi-annual equivalent yield to maturity at 11:00 a.m., New York City time, on the second business day preceding such redemption date of the United States Treasury security maturing on, or with a maturity that is closest to, the Par Call Date of the notes. If there is no United States Treasury security maturing on the Par Call Date of the notes but there are two or more United States Treasury securities with a maturity date equally distant from the Par Call Date of the notes, one with a maturity date preceding the Par Call Date and one with a maturity date following the Par Call Date, the Company shall select the United States Treasury security with a maturity date preceding the Par Call Date. If there are two

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or more United States Treasury securities maturing on the Par Call Date of the notes or two or more United States Treasury securities meeting the criteria of the preceding sentence, we shall select from among these two or more United States Treasury securities the United States Treasury security that is trading closest to par based upon the average of the bid and asked prices for such United States Treasury securities at 11:00 a.m., New York City time. In determining the Treasury Rate in accordance with the terms of this paragraph, the semi-annual yield to maturity of the applicable United States Treasury security shall be based upon the average of the bid and asked prices (expressed as a percentage of principal amount) at 11:00 a.m., New York City time, of such United States Treasury security, and rounded to three decimal places.

Our actions and determinations in determining the redemption price shall be conclusive and binding for all purposes, absent manifest error.

To exercise our option to redeem the notes, we will give you a notice in writing (including by facsimile transmission or electronic mail) of redemption at least 30 days but not more than 60 days prior to the date fixed for redemption. If we elect to redeem fewer than all the notes in the relevant series, The Bank of New York Mellon Trust Company, N.A., as trustee, will select the particular notes, as applicable, to be redeemed by lot; provided, however, that as long as the notes are held with a depositary, any such selection shall be in accordance with such depositary’s applicable procedures. No notes of a principal amount of $1,000 or less will be redeemed in part.

Unless we default in payment of the redemption price, on and after the redemption date interest will cease to accrue on the notes being redeemed. Any notice of redemption, at our option, may state that the redemption will be conditional upon receipt by the paying agent, on or prior to the date fixed for the redemption, of money sufficient to pay the principal, premium, if any, and interest, if any, on the notes and that if the money has not been so received, the notice will be of no force and effect and we will not be required to redeem the notes. See “Description of the Debt Securities—Redemption” in the accompanying base prospectus.

Notwithstanding the foregoing, installments of interest on notes that are due and payable on interest payment dates falling on or prior to a redemption date will be payable on the interest payment date to the registered holders as of the close of business on the relevant record date according to the notes and the indenture.

No Sinking Fund

There will be no provisions for any sinking funds for the notes.

Other

We may, from time to time, without notice to or the consent of the holders of the notes, increase the principal amount of the notes under the indenture and issue such increased principal amount (or any portion thereof), in which case any additional notes so issued shall have the same form and terms (other than the date of issuance, public offering price, and, under certain circumstances, the date from which interest thereon shall begin to accrue and the first interest payment date), and shall carry the same right to receive accrued and unpaid interest as the notes previously issued, and such additional notes shall form a single series with the notes offered by this prospectus supplement, provided that such additional notes shall be issued pursuant to a “qualified reopening” of the notes previously issued, will otherwise be treated as part of the same “issue” of debt instruments as such notes or will be issued with less than a de minimis amount of original issue discount for United States federal income tax purposes.

Book-Entry, Delivery, and Form

The notes will be represented by one or more permanent global notes in definitive, fully registered form without interest coupons. Upon issuance, the notes will be deposited with The Bank of New York Mellon Trust Company, N.A., as trustee, as custodian for The Depository Trust Company in New York, New York (which we refer to as “DTC”), and registered in the name of DTC or its nominee.

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Ownership of beneficial interests in a global note will be limited to persons who have accounts with DTC, which we refer to as “participants,” or persons who hold interests through participants. Ownership of beneficial interests in a global note will be shown on, and the transfer of that ownership will be effected only through, records maintained by DTC or its nominee (with respect to interests of participants) and the records of participants (with respect to interests of persons other than participants).

You may elect to hold interests in a global note either in the United States through DTC or outside the United States through Clearstream Banking, société anonyme (“Clearstream”), or Euroclear Bank, SA/NV, or its successor, as operator of the Euroclear System (“Euroclear”), if you are a participant of such system, or indirectly through organizations that are participants in such systems. Interests held through Clearstream and Euroclear will be recorded on DTC’s books as being held by the U.S. depositary for each of Clearstream and Euroclear, which U.S. depositaries will in turn hold interests on behalf of their participants’ customers’ securities accounts.

So long as DTC, or its nominee, is the registered owner or holder of any of the notes, DTC or that nominee, as the case may be, will be considered the sole owner or holder of such notes represented by the global note for all purposes under the note indenture and the notes. No beneficial owner of an interest in a global note will be able to transfer such interest except in accordance with DTC’s applicable procedures, in addition to those provided for under the note indenture.

Payments of the principal of, and interest on, a global note will be made to DTC or its nominee, as the case may be, as the registered owner thereof. None of the trustee, any paying agent, or we will have any responsibility or liability for any aspect of the records relating to or payments made on account of beneficial ownership interests in a global note or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests.

We expect that DTC or its nominee, upon receipt of any payment of principal or interest in respect of a global note, will credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the principal amount of such global note as shown on the records of DTC or its nominee. We also expect that payments by participants to owners of beneficial interests in such global note held through such participants will be governed by standing instructions and customary practices, as is now the case with securities held for the accounts of customers registered in the names of nominees for such customers. Such payments will be the responsibility of such participants.

We expect that transfers between participants in DTC will be effected in the ordinary way in accordance with DTC rules and procedures and will be settled in same-day funds. Secondary market trading between Clearstream participants and/or Euroclear system participants will occur in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream and the Euroclear system, as applicable.

We expect that DTC will take any action permitted to be taken by a holder of notes only at the direction of one or more participants to whose account the DTC interests in a global note is credited and only in respect of such portion of the aggregate principal amount of notes as to which such participant or participants has or have given such direction.

A global note is exchangeable for definitive notes in registered certificate form if:

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In all cases, certificated securities delivered in exchange for any global note or beneficial interests in global notes will be registered in the names, and issued in any approved denominations, requested by or on behalf of the depositary (in accordance with its customary procedures). Certificated securities may be presented for registration, transfer and exchange at The Bank of New York Mellon Trust Company, N.A., Chicago, Illinois, or the office or agency designated for such purpose.

DTC has advised us that: DTC is a limited purpose trust company organized under the laws of the State of New York, a “banking organization” within the meaning of New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the Uniform Commercial Code and a “Clearing Agency” registered pursuant to the provisions of Section 17A of the Exchange Act. DTC was created to hold securities for its participants and facilitate the clearance and settlement of securities transactions between participants through electronic book-entry changes in accounts of its participants, thereby eliminating the need for physical movement of certificates. Indirect access to the DTC system is available to others such as banks, brokers, dealers and trust companies and certain other organizations that clear through or maintain a custodial relationship with a participant, either directly or indirectly, whom we refer to as indirect participants.

Although DTC is expected to follow the foregoing procedures in order to facilitate transfers of interests in a global note among participants of DTC, they are under no obligation to perform or continue to perform such procedures, and such procedures may be discontinued at any time. None of the trustee, the paying agent, nor we will have any responsibility for the performance by DTC or its participants or indirect participants of their respective obligations under the rules and procedures governing their operations.

Settlement and Payment

We will make payments in respect of the notes represented by the global notes (including principal, interest and premium, if any) by wire transfer of immediately available funds to the accounts specified by the global noteholder. We will make all payments of principal, interest and premium with respect to certificated securities by wire transfer of immediately available funds to the accounts specified by the holders thereof or, if no account is specified, by mailing a check to that holder’s registered address. The exchange notes represented by the global notes are expected to trade in DTC’s Same Day Funds Settlement System, and any permitted secondary market trading activity in the notes will, therefore, be required by DTC to be settled in immediately available funds. We expect that secondary trading in any certificated securities will also be settled in immediately available funds.

Global Clearance and Settlement Procedures

Cross-market transfers between persons holding directly or indirectly through DTC on the one hand, and directly or indirectly through Clearstream participants or Euroclear system participants on the other, will be effected through DTC in accordance with DTC rules on behalf of the relevant European international clearing system by its U.S. depositary; however, such cross-market transactions will require delivery of instructions to the relevant European international clearing system by the counterparty in such system in accordance with its rules and procedures and within its established deadlines (European time). The relevant European international clearing system will, if the transaction meets its settlement requirements, deliver instructions to its U.S. depositary to take action to effect final settlement on its behalf by delivering or receiving securities in DTC, and making or receiving payment in accordance with normal procedures for same-day funds settlement applicable to DTC. Clearstream participants and Euroclear system participants may not deliver instructions directly to their respective U.S. depositaries.

Because of time-zone differences, credits of notes received in Clearstream or the Euroclear system as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. Such credits or any transactions in such notes settled during such processing will be reported to the relevant Euroclear system participant or Clearstream participant on such business day. Cash received in Clearstream or the Euroclear system as a result of sales of the

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notes by or through a Clearstream participant or a Euroclear system participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream or the Euroclear system cash account only as of the business day following settlement in DTC.

Although DTC, Clearstream and Euroclear have agreed to the foregoing procedures in order to facilitate transfers of debt securities among participants of DTC, Clearstream and Euroclear, they are under no obligation to perform or continue to perform such procedures and such procedures may be discontinued at any time.

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UNDERWRITING

Barclays Capital Inc., BNY Mellon Capital Markets, LLC, and RBC Capital Markets, LLC, as representatives of the underwriters named below (the “Representatives”) and as joint book-running managers of the offering, have entered into an underwriting agreement, dated the date of this prospectus supplement, with Edison International relating to the offer and sale of the notes. In the underwriting agreement, Edison International has agreed to sell to each underwriter, and each underwriter has severally, and not jointly, agreed to purchase from Edison International, the principal amount of notes set forth opposite its name below:

The underwriting agreement provides that the obligations of the underwriters to purchase the notes included in this offering are subject to approval of legal matters by counsel and to other conditions. The underwriters are obligated to purchase all the notes if they purchase any of the notes.

The underwriters propose to offer the notes directly to the public at the public offering price set forth on the cover page of this prospectus supplement and may offer the notes to dealers at the public offering price less a concession not to exceed  % of the principal amount of the notes. The underwriters may allow, and dealers may reallow a concession not to exceed  % of the principal amount of the notes on sales to other dealers. After the initial offering of the notes to the public, the underwriters may change the public offering price and concessions.

In connection with this offering, we will pay an underwriting discount to the underwriters of  % of the principal amount of the notes, equal to $    total underwriting discount.

In connection with the offering, the underwriters may purchase and sell notes in the open market. These transactions may include over-allotment, syndicate covering transactions, and stabilizing transactions. Over- allotment involves syndicate sales of notes in excess of the principal amount of notes to be purchased by the underwriter in the offering, which creates a syndicate short position. Syndicate covering transactions involve purchases of the notes in the open market after the distribution has been completed in order to cover syndicate short positions. Stabilizing transactions consist of certain bids or purchases of notes made for the purpose of preventing or retarding a decline in the market price of the notes while the offering is in progress.

The underwriters also may impose a penalty bid. Penalty bids permit the underwriters to reclaim a selling concession from a syndicate member when the underwriters, in covering syndicate short positions or making stabilizing purchases, repurchase notes originally sold by that syndicate member.

Any of these activities may have the effect of preventing or retarding a decline in the market price of the notes. They may also cause the price of the notes to be higher than the price that otherwise would exist in the open market in the absence of these transactions. The underwriters may conduct these transactions in the over-the-counter market or otherwise. If the underwriters commence any of these transactions, they may discontinue them at any time.

We estimate that our total expenses for this offering, excluding the underwriting discounts, will be $   .

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Certain of the underwriters and their affiliates have performed investment banking, commercial banking and advisory services for us and our affiliates from time to time for which they have received customary fees and expenses. The underwriters and their affiliates may, from time to time, engage in transactions with and perform services for us and our affiliates in the ordinary course of their business.

We expect delivery of the notes will be made against payment therefor on or about November   , 2024, which is the third business day after the date of this prospectus supplement. Under Rule 15c6-1 of the Exchange Act, trades in the secondary market generally are required to settle in one business day (referred to as “T+1”), unless the parties to any such trade expressly agree otherwise. Accordingly, purchasers who wish to trade the notes on the date of this prospectus or the next following business day will be required, by virtue of the fact that the notes initially will not settle in T+1, to specify an alternative settlement cycle at the time of any such trade to prevent a failed settlement and should consult their own advisor.

We have agreed to indemnify the underwriters against certain liabilities, including liabilities under the Securities Act of 1933, or to contribute to payments the underwriters may be required to make because of any of those liabilities.

Conflicts of Interest

The underwriters and their respective affiliates are full service financial institutions engaged in various activities, which may include securities trading, commercial and investment banking, financial advisory, investment management, investment research, principal investment, hedging, financing and brokerage activities.

In the ordinary course of their various business activities, the underwriters and their respective affiliates may make or hold a broad array of investments and actively trade debt and equity securities (or related derivative securities) and financial instruments (including bank loans) for their own account and for the accounts of their customers, and such investment and securities activities may involve our securities and instruments or those of our affiliates. See “Use of Proceeds.” The underwriters and their respective affiliates may also make investment recommendations or publish or express independent research views in respect of such securities or instruments and may at any time hold, or recommend to clients that they acquire, long or short positions in such securities and instruments.

BNY Mellon Capital Markets, LLC, one of the underwriters participating in the offering, is an affiliate of the trustee under the notes indenture.

Selling Restrictions

No action has been or will be taken by us that would permit a public offering of the notes, or possession or distribution of this prospectus supplement or the accompanying base prospectus or any other offering or publicity material relating to the notes, in any country or jurisdiction outside the United States where, or in any circumstances in which, action for that purpose is required. Accordingly, the notes may not be offered or sold, directly or indirectly, and this prospectus supplement, the accompanying base prospectus and any other offering or publicity material relating to the notes may not be distributed or published, in or from any country or jurisdiction outside the United States except under circumstances that will result in compliance with applicable laws and regulations.

Canada

The notes may be sold only to purchasers purchasing, or deemed to be purchasing, as principal that are accredited investors, as defined in National Instrument 45-106 Prospectus Exemptions or subsection 73.3(1) of the Securities Act (Ontario), and are permitted clients, as defined in National Instrument 31-103 Registration Requirements, Exemptions and Ongoing Registrant Obligations. Any resale of the notes must be made in accordance with an exemption from, or in a transaction not subject to, the prospectus requirements of applicable securities laws.

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Securities legislation in certain provinces or territories of Canada may provide a purchaser with remedies for rescission or damages if this prospectus supplement together with the accompanying prospectus (including any amendment thereto) contains a misrepresentation, provided that the remedies for rescission or damages are exercised by the purchaser within the time limit prescribed by the securities legislation of the purchaser’s province or territory. The purchaser should refer to any applicable provisions of the securities legislation of the purchaser’s province or territory for particulars of these rights or consult with a legal advisor.

Pursuant to section 3A.3 of National Instrument 33-105 Underwriting Conflicts (“NI 33-105”), the underwriters are not required to comply with the disclosure requirements of NI 33-105 regarding underwriter conflicts of interest in connection with this offering.

European Economic Area

The notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the European Economic Area (“EEA”). For these purposes, a retail investor means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, “MiFID II”); or (ii) a customer within the meaning of Directive (EU) 2016/97 (as amended, the “Insurance Distribution Directive”), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not a qualified investor as defined in Regulation (EU) 2017/1129 (as amended, the “Prospectus Regulation”). Consequently, no key information document required by Regulation (EU) No 1286/2014 (as amended, the “PRIIPs Regulation”) for offering or selling the notes or otherwise making them available to retail investors in the EEA has been prepared and therefore offering or selling the notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation. This prospectus supplement and the accompanying prospectus have been prepared on the basis that any offer of the notes in any Member State of the EEA will be made pursuant to an exemption under the Prospectus Regulation from the requirement to publish a prospectus for offers of the notes. This prospectus supplement and the accompanying prospectus are not a prospectus for the purposes of the Prospectus Regulation.

Each person in a Member State of the EEA who receives any communication in respect of, or who acquires any notes under, the offer contemplated in this prospectus supplement and the accompanying prospectus, or to whom the notes are otherwise made available, will be deemed to have represented, warranted and agreed to and with us and the underwriters that it and any person on whose behalf it acquires bond is not a “retail investor” as defined above.

We have not authorized and do not authorize the making of any offer of the notes through any financial intermediary on our behalf, other than offers made by the underwriters with a view to the final placement of the notes as contemplated in this prospectus supplement and the accompanying prospectus. Accordingly, no purchaser of the notes, other than the underwriters, is authorized to make any further offer of the notes on our behalf or on behalf of the underwriters.

United Kingdom

The notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the United Kingdom (“UK”). For these purposes, a retail investor means a person who is one (or more) of: (i) a retail client, as defined in point (8) of Article 2 of Regulation (EU) No 2017/565 as it forms part of UK domestic law by virtue of the European Union (Withdrawal) Act 2018 (the “EUWA”); or (ii) a customer within the meaning of the provisions of the Financial Services and Markets Act 2000 (“FSMA”) and any rules or regulations made under the FSMA to implement Directive (EU) 2016/97, where that customer would not qualify as a professional client, as defined in point (8) of Article 2(1) of Regulation (EU) No 600/2014 as it forms part of UK domestic law by virtue of the EUWA; or (iii) not a qualified investor as defined in Article 2 of Regulation (EU) 2017/1129 as it forms part of UK domestic law

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by virtue of the EUWA (the “UK Prospectus Regulation”). For the purpose of this provision, the expression “an offer” includes the communication in any form and by any means of sufficient information on the terms of the offer and the notes to be offered so as to enable an investor to decide to purchase or subscribe for the notes. Consequently, no key information document required by Regulation (EU) No 1286/2014 as it forms part of UK domestic law by virtue of the the EUWA ( the “UK PRIIPs Regulation”) for offering or selling the notes or otherwise making them available to retail investors in the UK has been prepared and therefore offering or otherwise selling the notes or otherwise making them available to any retail investor in the UK may be unlawful under the UK PRIIPs Regulation. This prospectus supplement and the accompanying prospectus have been prepared on the basis that any offer of the notes in the UK will be made pursuant to an exemption under the UK Prospectus Regulation from the requirement to publish a prospectus for offers of notes. This prospectus supplement and the accompanying prospectus are not a prospectus for the purposes of the UK Prospectus Regulation

This communication is only being distributed to and is only directed at (i) persons who are outside the UK or (ii) investment professionals falling within Article 19 (5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the “Order”) or (iii) high net worth entities, and other persons to whom it may lawfully be communicated, falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). The notes are only available to, and any invitation, offer or agreement to subscribe, purchase or otherwise acquire such notes will be engaged in only with, relevant persons. Any person who is not a relevant person should not act or rely on this document or any of its contents.

Hong Kong

The notes have not been and will not be offered or sold in Hong Kong by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies (Winding Up and Miscellaneous Provisions) Ordinance (Cap. 32, Laws of Hong Kong) (the “Companies Ordinance”), (ii) to “professional investors” as defined in the Securities and Futures Ordinance (Cap. 571 of the Laws of Hong Kong) (the “SFO”) and any rules made thereunder, or (ii) in other circumstances which do not result in the document being a “prospectus” within the meaning of the Companies Ordinance or which do not constitute an offer to the public within the meaning of the Companies Ordinance. No advertisement, invitation or document relating to the notes may be issued or may be in the possession of any person for the purpose of issue (in each case, whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the securities laws of Hong Kong) other than with respect to the notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” as defined in the SFO and any rules made thereunder.

Japan

The notes have not been and will not be registered under the Financial Instruments and Exchange Law of Japan (Law No. 25 of 1948 of Japan, as amended, the “FIEL”). In respect of the solicitation relating to the notes in Japan, no securities registration statement under Article 4, Paragraph 1 of the FIEL has been filed, since this solicitation constitutes a “solicitation targeting QIIs”, as defined in Article 23-13, Paragraph 1 of the FIEL, each underwriter has represented and agreed it will not offer or sell, directly or indirectly, any notes in Japan or to, or for the benefit of, any resident of Japan or to others for reoffering or resale, directly or indirectly, in Japan or to, or for the benefit of, a resident of Japan, except for a QII. pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the FIEL and any other applicable laws, regulations and ministerial guidelines of Japan. As used in this paragraph, “resident of Japan” means any person resident in Japan, including any corporation or other entity organized under the laws of Japan.

Singapore

This prospectus supplement and the accompanying prospectus have not been and will not be registered as a prospectus with the Monetary Authority of Singapore. Accordingly, this prospectus supplement and the

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accompanying prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the notes have not been and will not be, whether directly or indirectly, circulated or distributed, nor have the notes been or will the notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to any person in Singapore other than (i) to an institutional investor pursuant to Section 274 of the Securities and Futures Act 2001 of Singapore (as modified and/or amended from time to time, including by such of its subsidiary legislation as may be applicable at the relevant time) (the “SFA”) or (ii) to an accredited investor pursuant to, and in accordance with the conditions specified in Section 275 of the SFA.

Singapore Securities and Futures Act Product Classification—Soley for the purpose of our obligations pursuant to sections 309B of the SFA and the Securities and Futures (Capital Markets Products) Regulations 2018 of Singapore (the “CMP Regulations 2018”), we have determined, and hereby notify all persons (including relevant persons as defined in Section 309A(1) of the SFA), that the notes are “prescribed capital markets products” (as defined in the CMP Regulations 2018) and Excluded Investment Products (as defined in Monetary Authority of Singapore Notice SFA 04-N12: Notice on the Sale of Investment Products and Monetary Authority of Singapore Notice FAA-N16: Notice on Recommendations on Investment Products).

Switzerland

The notes may not be publicly offered in Switzerland and will not be listed on the SIX Swiss Exchange (“SIX”) or on any other stock exchange or regulated trading facility in Switzerland. This prospectus supplement and the accompanying prospectus do not constitute a prospectus within the meaning of and have been prepared without regard to the disclosure standards for issuance prospectuses under art. 652a or art. 1156 of the Swiss Code of Obligations or the disclosure standards for listing prospectuses under art. 27 ff. of the SIX Listing Rules or the listing rules of any other stock exchange or regulated trading facility in Switzerland. No underwriter may publicly distribute or otherwise make publicly available in Switzerland this prospectus supplement, the accompanying prospectus or any other offering or marketing material relating to the notes.

Neither this prospectus supplement, the accompanying prospectus nor any other offering or marketing material relating to the offering, us or the notes has been or will be filed with or approved by any Swiss regulatory authority. In particular, this prospectus supplement and the accompanying prospectus will not be filed with, and the offer of the notes will not be supervised by, the Swiss Financial Market Supervisory Authority FINMA, and the offer of the notes has not been and will not be authorized under the Swiss Federal Act on Collective Investment Schemes (the “CISA”). The investor protection afforded to acquirers of interests in collective investment schemes under the CISA does not extend to acquirers of the notes.

Taiwan

The notes have not been and will not be registered, filed with or approved by the Financial Supervisory Commission of Taiwan, the Republic of China (“Taiwan”) and/or other regulatory authority or agency of Taiwan, pursuant to relevant securities laws and regulations of Taiwan. The notes have not been and will not be issued, offered or sold, directly or indirectly, in Taiwan to investors other than “professional investors” as defined under Article 4 of the Financial Consumer Protection Act of Taiwan, unless otherwise permitted by the laws and regulations of Taiwan. No person or entity in Taiwan has been authorized to offer or sell the notes in Taiwan, unless otherwise permitted by laws and regulations of Taiwan.

People’s Republic of China (excluding Hong Kong, Macau and Taiwan)

The notes are not being offered or sold and may not be offered or sold, directly or indirectly, in the People’s Republic of China (the “PRC”) (for the sole purpose herein, not including Hong Kong, Macau Special Administrative Regions and Taiwan).

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This prospectus supplement and the accompanying base prospectus (i) have not been filed with or approved by, verified by or registered with any relevant PRC authorities, thus (ii) may not be circulated in the PRC or used in connection with any offer for the subscription or sale of the notes in the PRC, and (iii) do not constitute an offer to sell or subscribe, or the solicitation of an offer to buy, directly or indirectly, any notes in the PRC to, or for the benefit of, any legal or natural persons in the PRC.

The notes may only be invested in by PRC investors that are authorized to engage in the investment in the notes of the type being offered or sold. Investors in the PRC are responsible for obtaining all relevant government regulatory approvals/licenses, verification and/or registrations themselves, including, but not limited to, those which may be required by the People’s Bank of China, the China Securities Regulatory Commission, the State Administration of Foreign Exchange, the China Banking and Insurance Regulatory Commission, and/or other relevant regulatory bodies, and complying with all relevant PRC laws and regulations, including, but not limited to, all relevant foreign exchange regulations and/or securities investment regulations.

Republic of Korea

The notes have not been and will not be registered with the Financial Services Commission of the Republic of Korea (“Korea”) for public offering in Korea under the Financial Investment Services and Capital Markets Act of Korea and its subordinate decrees and regulations (collectively, the “FSCMA”). None of the notes may be offered, sold or delivered, directly or indirectly, or offered or sold to any person for re-offering or resale or re-delivery, directly or indirectly, in Korea or to, or for the account or benefit of, any resident of Korea (as defined in the Foreign Exchange Transaction Law of Korea and the subordinate decrees and regulations thereunder (collectively, the “FETL”)) except as otherwise permitted under the applicable laws and regulations of Korea, including the FSCMA and the FETL. Without prejudice to the foregoing, the number of the notes offered in Korea or to a resident in Korea shall be less than fifty, and for a period of one year from the Issue Date of the notes, none of the notes may be divided resulting in an increased number of the notes. Furthermore, the notes may not be resold to Korean residents unless the purchaser of the notes complies with all applicable regulatory requirements (including but not limited to government reporting requirements under the FETL) in connection with the purchase of the notes.

United Arab Emirates

The notes have not been, and are not being, publicly offered, sold, promoted or advertised in the United Arab Emirates (the “UAE”), including the Dubai International Financial Centre (the “DIFC”) or the Abu Dhabi Global Market (the “ADGM”) other than in compliance with the laws of the UAE, the DIFC and the ADGM governing the issue, offering and sale of securities.

Further, this prospectus supplement and the accompanying prospectus do not constitute an offer, sale or delivery of securities in the UAE (including the DIFC or the ADGM) and are not intended to be a public offer.

Each underwriter represents and agrees, and each person to whom this prospectus supplement and the accompanying prospectus (and any accompanying documents) have been issued understands, acknowledges and agrees that the prospectus supplement and the accompanying prospectus have not been approved by or filed with the Central Bank of the UAE, the UAE Securities and Commodities Authority, the Financial Services Regulatory Authority of the ADGM or the Dubai Financial Services Authority of the DIFC or any other licensing authorities of any of the free zones established and operating in the UAE.

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LEGAL MATTERS

Michael A. Henry, Assistant General Counsel, will pass upon the legality of the notes for us. Certain legal matters will be passed upon for the underwriters by Cleary Gottlieb Steen & Hamilton LLP, New York, New York.

Mr. Henry is a salaried employee of Southern California Edison Company and earns stock-based compensation based on Edison International’s common stock. Additionally, he may hold Edison International stock-based interests through an employee benefit plan and can participate in an Edison International shareholder dividend reinvestment and stock purchase plan.

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PROSPECTUS

EDISON INTERNATIONAL

Debt Securities

Preferred Stock

Common Stock

We may offer and sell an indeterminate amount of the securities listed above, or any combination thereof, from time to time in amounts, at prices and on other terms to be determined at the time of the offering. We may sell these securities to or through one or more underwriters, dealers and agents, or directly to purchasers, on a continuous or delayed basis. In addition, selling securityholders may also sell their shares of common stock, from time to time, if so identified and on terms described in the applicable prospectus supplement or pricing supplement.

This prospectus describes some of the general terms that may apply to these securities and the general manner in which they may be offered. The specific terms of any securities to be offered, and the specific manner in which they may be offered, will be described in a supplement or supplements to this prospectus and any pricing supplement. The supplement or supplements may also add, update or change information contained in this prospectus. You should carefully read this prospectus and any supplement for the specific offering before you invest in any of the securities.

A prospectus supplement will set forth the names of any underwriters, dealers or agents involved in the sale of the securities, the principal amounts of securities to be purchased by them, and the compensation they will receive. Our common stock is listed on the New York Stock Exchange under the symbol “EIX”.

Investing in our securities involves risks. See “Risk Factors” on page 2 of this prospectus and the risk factors included in the applicable prospectus supplement and in the documents incorporated by reference in this prospectus and in any accompanying supplement that we prepare or authorize.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this Prospectus is July 25, 2024

TABLE OF CONTENTS

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ABOUT THIS PROSPECTUS

This prospectus is provided by Edison International which is sometimes referred to in this prospectus by the terms “we,” “us” and “our.” We refer to our debt securities, common stock and preferred stock together as “securities.”

This prospectus is part of a “shelf” registration statement filed with the United States Securities and Exchange Commission. By using a shelf registration statement, we may sell the securities described in this prospectus from time to time in one or more offerings. This prospectus only provides you with a general description of the securities that we may offer. Each time we sell securities, we will provide a supplement to this prospectus that contains specific information about the terms of the securities. The supplement may also add, delete, update or change information contained in this prospectus. You should rely on the information in the applicable supplement if this prospectus and the supplement are inconsistent. Before purchasing any securities, you should carefully read both this prospectus and any applicable supplement, together with the additional information described under the heading “Where You Can Find More Information.”

We are responsible for the information contained and incorporated by reference in this prospectus, in any accompanying supplement and in any applicable free writing prospectus that we prepare or authorize. We have not authorized anyone to provide you with any other information, and we take no responsibility for any other information that others may provide you. We will not make an offer to sell these securities in any jurisdiction where the offer or sale is not permitted. You should assume that the information appearing in this prospectus and any supplement is accurate only as of the dates on their respective covers, or any earlier dates specified therein. Our business, financial condition, results of operations and prospects may have changed since those respective dates.

FORWARD-LOOKING STATEMENTS

This prospectus, any accompanying supplement and the additional information described under the heading “Where You Can Find More Information” may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act, and Section 21E of the Exchange. Forward-looking statements reflect our current expectations and projections about future events based on our knowledge of present facts and circumstances and assumptions about future events and include any statement that does not directly relate to a historical or current fact. The words “believes,” “expects,” “anticipates,” “intends,” “plans,” “estimates,” “projects,” “probable,” “may,” “will,” “could,” “would,” “should,” and variations of such words and similar expressions, or discussions of strategy or of plans, are intended to identify forward-looking statements. Such statements necessarily involve risks and uncertainties that could cause actual results to differ materially from those anticipated. Various factors may cause actual results to be materially different than the suggested outcomes within forward-looking statements; accordingly, there is no assurance that such results will be realized. Some of the risks, uncertainties and other important factors that could cause results to differ from those currently expected, or that otherwise could impact us or the value of our securities, are described under the headings “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” “Forward-Looking Statements” and “Risk Factors” in our Annual Report on Form 10-K for the year ended December 31, 2023, and in subsequent Quarterly Reports on Form 10-Q and Current Reports on Form 8-K incorporated by reference into this prospectus.

We urge you to read this entire prospectus, including any supplement and the information incorporated by reference, and carefully consider the risks, uncertainties and other factors that affect our business. In light of these risks, uncertainties and assumptions, the events described in the forward-looking statements included or incorporated by reference in this prospectus might not occur or might occur to a different extent or at a different time than described. Forward-looking statements are made based on information currently available to us and speak only as of the date they are made and we expressly disclaim an obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. You should review future reports we file with the Securities and Exchange Commission.

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EDISON INTERNATIONAL

Edison International is the parent holding company of Southern California Edison Company (“SCE”). SCE is an investor-owned public utility primarily engaged in the business of supplying and delivering electricity to an approximately 50,000 square mile area of southern California, excluding the City of Los Angeles and certain other cities. Edison International also owns or holds interests in companies that are competitive businesses engaged in providing energy services to commercial and industrial customers. Based in Rosemead, California, Edison International was incorporated in California in 1987.

The mailing address and telephone number of our principal executive offices are P.O. Box 976, Rosemead, CA 91770 and (626) 302-2222.

RISK FACTORS

Investing in our securities involves risks. Before purchasing any securities we offer, you should carefully consider the risk factors that are incorporated by reference herein from the section captioned “Risk Factors” in our most recent Annual Report on Form 10-K, together with all of the other information included in this prospectus and any prospectus supplement and any other information that we have incorporated by reference, including filings made with the Securities and Exchange Commission subsequent to the date hereof. Any of these risks, as well as other risks and uncertainties, could harm our financial condition, results of operations or cash flows.

USE OF PROCEEDS

Except as otherwise described in a prospectus supplement, we intend for the net proceeds of the offered securities to be used for general corporate purposes.

DESCRIPTION OF THE DEBT SECURITIES

The following is a general description of the terms and provisions of the debt securities we may offer and sell by this prospectus in one or more distinct offerings. This summary is not meant to be a complete description of each series of debt securities. This prospectus and any accompanying prospectus supplement will contain the particular terms and conditions for each series of debt securities. For more information about the debt securities, please refer to the indenture dated as of September 10, 2010 between Edison International and The Bank of New York Mellon Trust Company, N.A., as trustee, for the issuance of debt securities, which we refer to as the “indenture” in this prospectus.

We have filed a copy of the indenture as an exhibit to the registration statement that includes this prospectus. We refer to the trustee for the indenture as the “indenture trustee.” The indenture is governed by the Trust Indenture Act of 1939 and may be supplemented or amended from time to time.

The indenture gives us broad authority to set the particular terms of each series of debt securities, including the right to modify certain of the terms contained in the indenture. The particular terms of a series of debt securities and the extent, if any, to which the particular terms of the series modify the terms of the indenture will be described in the prospectus supplement relating to the debt securities.

The indenture contains the full legal text of the matters described in this section. Because this section is a summary, it does not describe every aspect of the debt securities or the indenture. This summary is subject to and qualified by all the provisions of the indenture, including definitions of terms used in the indenture. Therefore, you should read carefully the detailed provisions of the indenture, which we have incorporated by reference as an exhibit to the registration statement that includes this prospectus. This summary also is subject to and qualified by the description of the particular terms of the debt securities in the applicable prospectus supplement.

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General

We may issue an unlimited amount of debt securities under the indenture in one or more series. We need not issue all debt securities of one series at the same time and, unless otherwise provided, we may reopen a series, without the consent of the holders of the debt securities of that series, for issuances of additional debt securities of that series.

Prior to the issuance of each series of debt securities, the terms of the particular debt securities will be specified in a supplemental indenture (including any pricing supplement) or in one or more officer’s certificates of Edison International pursuant to a supplemental indenture or a board resolution. We refer you to the applicable prospectus supplement for a description of the following terms, among others, of the series of debt securities:

Ranking

The debt securities will be unsecured senior debt obligations of Edison International. The indebtedness represented by the debt securities will rank equally with all other unsecured and unsubordinated debt of Edison International.

Holding Company Structure

Edison International conducts its operations through its subsidiaries and substantially all of its consolidated assets are held by its subsidiaries. Accordingly, Edison International’s cash flow and its ability to meet its obligations under its debt securities are largely dependent upon the earnings of its subsidiaries and the distribution or other payment of these earnings to Edison International. The subsidiaries are separate and distinct legal entities and have no obligation to pay any amounts due on the Edison International debt securities or to make any funds available for payment of amounts due on these debt securities.

Because Edison International is a holding company, its obligations under the debt securities will be structurally subordinated to all existing and future liabilities and preferred equity of its subsidiaries. Therefore, the rights of Edison International’s creditors, including the rights of the holders of the debt securities issued by Edison International, to participate in the assets of any subsidiary upon the liquidation or reorganization of the

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subsidiary will depend on the rights of Edison International against the subsidiary. In that regard, Edison International’s equity interest in the subsidiary would be subject to the prior claims of the subsidiary’s creditors and preferred stockholders. To the extent that Edison International may itself be a creditor with recognized claims against any of its subsidiaries, Edison International’s claims would be subordinated to any security interest in, or mortgages or other liens on, the assets of the subsidiary or any other indebtedness or other liabilities of the subsidiary that are senior to the claims held by Edison International.

Payment of Debt Securities—Interest

Unless we state otherwise, so long as the debt securities remain in book-entry only form, payments on the debt securities will be made in accordance with the policies and procedures of the depositary for the debt securities. If the debt securities no longer remain in book-entry form, we will pay interest on the debt security on each interest payment date to the person in whose name the debt security is registered as of the close of business on the regular record date relating to the interest payment date.

Unless otherwise specified in connection with a particular offering of debt securities:

If a date for payment of interest or principal on the debt securities falls on a day that is not a business day in the place of payment, such payment will be made on the next succeeding business day in such place of payment as if made on the date the payment was due. No interest will accrue on any amounts payable for the period from and after the due date for payment of such principal or interest.

If we default in paying interest on a debt security, we will pay defaulted interest in either of the two following ways:

Payment of Debt Securities—Principal

Unless indicated otherwise in an applicable prospectus supplement, we will pay principal of and any premium on the debt securities at stated maturity, upon redemption or otherwise, upon presentation of the debt securities at the office of the indenture trustee, as our initial paying agent. Any other paying agent initially designated for the debt securities of a particular series will be named in the applicable prospectus supplement.

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In our discretion, we may change the place of payment on the debt securities, and may remove any paying agent, may appoint one or more additional paying agents, and may act as our own paying agent.

If the stated maturity of the debt securities falls on a day that is not a Business Day, the payment due at stated maturity will be postponed to the next succeeding Business Day, and no further interest will accrue in respect of such postponement.

Form; Transfers; Exchanges

Unless we indicate otherwise in an applicable prospectus supplement, the debt securities will be issued

Global Debt Securities

We may issue debt securities of any series in whole or in part in the form of one or more global debt securities that will be deposited with, or on behalf of, The Depositary Trust Company (“DTC”) or a depositary identified in the prospectus supplement relating to that series. Unless and until it is exchanged in whole or in part for individual certificates evidencing debt securities in definitive form, a global security may not be transferred except as a whole by the depositary for that global security to a nominee of that depositary, or by a nominee of that depositary to that depositary or another nominee of that depositary, or by that depositary or that nominee to a successor of that depositary or a nominee of that successor. We will describe the specific terms of the depositary arrangement for a series of debt securities, and how that arrangement may affect the process for receiving payments on the debt securities, in the prospectus supplement relating to that series.

Exchange

You may have your debt securities divided into debt securities of smaller denominations (of at least $1,000) or combined into debt securities of larger denominations, as long as the total principal amount is not changed. This is called an “exchange.”

You may exchange or transfer debt securities (other than debt securities represented by a global security) at the office of the indenture trustee. The indenture trustee acts as our agent for registering debt securities in the names of holders and transferring debt securities (other than debt securities represented by a global security). We may appoint another agent or act as our own agent for this purpose. The entity performing the role of maintaining the list of registered holders is called the “security registrar.” It will also perform transfers, if applicable.

In our discretion, we may change the place for registration of transfer of the debt securities (other than debt securities represented by a global security) and may remove and/or appoint one or more additional security registrars.

Except as otherwise provided in a prospectus supplement, there will be no service charge for any transfer or exchange of the debt securities, but you may be required to pay a sum sufficient to cover any tax or other governmental charge payable in connection with the transfer or exchange. We may block the transfer or exchange of (a) debt securities during a period of 15 days prior to mailing any notice of redemption or (b) any debt security selected for redemption in whole or in part, except the unredeemed portion of any debt security being redeemed in part.

Redemption

We will set forth any terms for the redemption of debt securities in a prospectus supplement. Unless we indicate otherwise in a prospectus supplement, and except with respect to debt securities redeemable at the option

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of the registered holder, debt securities will be redeemable upon notice mailed between 30 and 60 days prior to the redemption date. Any prospectus supplement may provide that the notice of redemption of the debt securities may state that such redemption shall be conditional, in our discretion, on one or more conditions precedent, and that such conditional notice of redemption may be rescinded by us if we determine that any or all such conditions will not be satisfied by the redemption date, and that in such event, such redemption notice shall be of no further force or effect and we shall not be required to redeem the debt securities on the redemption date or otherwise. If less than all of the debt securities of any series or any tranche of a series are to be redeemed, the indenture trustee will select the debt securities to be redeemed. In the absence of any provision for selection, the indenture trustee will choose a method of random selection it deems fair and appropriate.

Debt securities will cease to bear interest on the redemption date. We will pay the redemption price and any accrued interest to but excluding the redemption date once you surrender the debt security for redemption. If only part of a debt security is redeemed, the indenture trustee will deliver to you a new debt security of the same series for the remaining portion without charge.

We may make any redemption conditional upon the receipt by the paying agent, on or prior to the date fixed for redemption, of money sufficient to pay the redemption price. If the paying agent has not received the money by the date fixed for redemption, the redemption will not occur.

Events of Default

An “event of default” occurs with respect to debt securities of any series if:

No event of default with respect to a series of debt securities necessarily constitutes an event of default with respect to the debt securities of any other series issued under the indenture.

Remedies

Acceleration

If an event of default occurs and is continuing with respect to any series of debt securities, then either the indenture trustee or the registered holders of not less than 33% in principal amount of the outstanding debt securities of that series may declare the principal amount of all of the debt securities of that series to be due and payable immediately. If an event of default described in clauses (d) or (e) of “— Events of Default” above occurs and is continuing with respect to all series of debt securities, then either the indenture trustee or the registered holders of not less than 33% in principal amount of all outstanding debt securities may declare the principal amount of all outstanding debt securities to be due and payable immediately.

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Rescission of Acceleration

After the declaration of acceleration has been made and before the indenture trustee has obtained a judgment or decree for payment of the money due on any series or all series of debt securities, as the case may be, the registered holders of not less than a majority in aggregate principal amount of the outstanding debt securities of that series or all series may rescind and annul the declaration and its consequences, if:

For more information as to waiver of defaults, see “Waiver of Default and of Compliance” below.

Control by Registered Holders; Limitations

Subject to the indenture, if an event of default with respect to the debt securities of any series occurs and is continuing, the registered holders of a majority in principal amount of the outstanding debt securities of that series will have the right to

If an event of default is continuing with respect to all the series of debt securities, the registered holders of a majority in aggregate principal amount of the outstanding debt securities of all the series, considered as one class, will have the right to make such direction, and not the registered holders of the debt securities of any one of the series. These rights of registered holders to make direction are subject to the following limitations:

The indenture trustee may also take any other action it deems proper which is consistent with the registered holders’ direction.

In addition, the indenture provides that no registered holder of any debt security of any series will have any right to institute any proceeding, judicial or otherwise, with respect to the indenture for the appointment of a receiver or for any other remedy under the indenture unless

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Furthermore, no registered holder will be entitled to institute any action if and to the extent that the action would disturb or prejudice the rights of other registered holders, seek to obtain priority or preference over other registered holders or enforce any right under the indenture except as provided in the indenture and for the equal and ratable benefit of all registered holders.

However, each registered holder has an absolute and unconditional right to receive payment when due and to bring a suit to enforce that right.

Notice of Default

The indenture trustee is required to give the registered holders of the debt securities notice of any default under the indenture to the extent required by the Trust Indenture Act of 1939, unless the default has been cured or waived; except that in the case of an event of default of the character specified above in clause (d) under “Events of Default,” no notice shall be given to the registered holders until at least 30 days after the occurrence thereof.

The Trust Indenture Act of 1939 currently permits the indenture trustee to withhold notices of default (except for certain payment defaults) if the indenture trustee in good faith determines the withholding of the notice to be in the interests of the registered holders.

We will furnish the indenture trustee with a statement each calendar year as to our compliance with the conditions and covenants in the indenture.

Waiver of Default and of Compliance

The registered holders of a majority in aggregate principal amount of the outstanding debt securities of all affected series (voting as one class) may waive, on behalf of the registered holders of all debt securities of all such series, any past default under the indenture, except a default in the payment of principal, premium or interest, or with respect to compliance with certain provisions of the indenture that cannot be amended without the consent of the registered holder of each outstanding debt security.

Compliance with some of the covenants in the indenture or otherwise provided with respect to debt securities may be waived by the registered holders of a majority in aggregate principal amount of the affected debt securities, considered as one class.

Covenants

Consolidation, Merger and Conveyance of Assets as an Entirety

Subject to the provisions described in the next paragraph, Edison International will preserve its corporate existence.

Edison International has agreed not to consolidate with or merge into any other entity and not to convey, transfer or lease its properties and assets substantially as an entirety to any entity, unless:

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Notwithstanding the foregoing, we may merge or consolidate with or transfer all or substantially all of its assets to an affiliate that has no significant assets or liabilities and was formed for the purpose of changing our jurisdiction of organization or our form of organization; provided that the successor assumes all of our obligations under the indenture.

No Financial Covenants

The indenture contains no financial or other similar restrictive covenants. Any such covenants with respect to any particular series of debt securities will be set forth in the applicable prospectus supplement.

Modification of Indenture

Without Registered Holder Consent

Without the consent of any registered holders of debt securities, we and the applicable indenture trustee may enter into one or more supplemental indentures for any of the following purposes:

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If the Trust Indenture Act of 1939 is amended after the date of the indenture so as to require changes to the indenture or so as to permit changes to, or the elimination of, provisions which, at the date of the indenture or at any time thereafter, were required by the Trust Indenture Act of 1939 to be contained in the indenture, the indenture will be deemed to have been amended so as to conform to the amendment or to effect the changes or elimination, regardless of whether Edison International and the applicable indenture trustee enter into one or more supplemental indentures to effect or evidence the amendment as described above.

In our discretion, with notice to the indenture trustee, we may change any place or places where:

With Registered Holder Consent

We and the indenture trustee may, with some exceptions, amend or modify any indenture with the consent of the registered holders of at least a majority in aggregate principal amount of the debt securities of all series affected by the amendment or modification (voting as one class). However, no amendment or modification may, without the consent of the registered holder of each outstanding debt security affected thereby:

A supplemental indenture which changes or eliminates any provision of the indenture expressly included solely for the benefit of registered holders of debt securities of one or more particular series or tranches will be deemed not to affect the rights under the indenture of the registered holders of debt securities of any other series or tranche.

Miscellaneous

The indenture provides that some debt securities, including those for which payment or redemption money has been deposited or set aside in trust, will not be deemed to be “outstanding” in determining whether the registered holders of the requisite principal amount of the outstanding debt securities have given or taken any demand, direction, consent or other action under the indenture as of any date, or are present at a meeting of registered holders for quorum purposes.

We will be entitled to set any day as a record date for the purpose of determining the registered holders of outstanding debt securities of any series entitled to give or take any demand, direction, consent or other action

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under the indenture, in the manner and subject to the limitations provided in the indenture. In some circumstances, the indenture trustee also will be entitled to set a record date for action by registered holders. If a record date is set for any action to be taken by registered holders of particular debt securities, the action may be taken only by persons who are registered holders of the respective debt securities on the record date.

Any money we provide to a paying agent for the payment of principal, premium or interest that remains unclaimed at the end of two years after the payment became due and payable will be repaid to us. Thereafter, the holder of debt securities entitled to such payment must look only to us for payment.

Defeasance and Covenant Defeasance

The indenture provides, unless the terms of the particular series of debt securities provide otherwise, that we may, upon satisfying several conditions, cause ourselves to be:

One condition we must satisfy is the irrevocable deposit with the indenture trustee, in trust, of money and/or government obligations which, through the scheduled payment of principal and interest on those obligations, would provide sufficient moneys to pay the principal of and any premium and interest on those debt securities on the maturity dates of the payments or upon redemption.

The indenture permits defeasance with respect to any series of debt securities even if a prior covenant defeasance has occurred with respect to the debt securities of that series. Following a defeasance, payment of the debt securities defeased may not be accelerated because of an event of default. Following a covenant defeasance, payment of the debt securities may not be accelerated by reference to the specified covenants affected by the covenant defeasance. However, if an acceleration were to occur, the realizable value at the acceleration date of the money and government obligations in the defeasance trust could be less than the principal and interest then due on the respective debt securities, since the required deposit in the defeasance trust would be based upon scheduled cash flows rather than market value, which would vary depending upon interest rates and other factors.

Under current United States federal income tax law, the defeasance contemplated in the preceding paragraphs would be treated as an exchange of the relevant debt securities in which holders of the debt securities might recognize gain or loss. In addition, the amount, timing and character of amounts that holders would be required after the defeasance to include in income might be different from that which would be includible in the absence of the defeasance. Prospective investors are urged to consult their own tax advisors as to the specific consequences of a defeasance, including the applicability and effect of tax laws other than United States federal income tax laws.

Under current United States federal income tax laws, unless accompanied by other changes in the terms of the debt securities, covenant defeasance generally should not be treated as a taxable exchange.

Resignation and Removal of the Indenture Trustee; Deemed Resignation

The indenture trustee may resign at any time by giving written notice to us.

The indenture trustee may also be removed with respect to any series of debt securities by act of the registered holders of a majority in principal amount of the then outstanding debt securities of any such series.

No resignation or removal of the indenture trustee and no appointment of a successor indenture trustee will become effective until the acceptance of appointment by a successor indenture trustee in accordance with the requirements of the indenture.

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Under some circumstances, we may appoint a successor indenture trustee and, if the successor accepts, the indenture trustee will be deemed to have resigned.

Governing Law

The indenture and the related debt securities will be governed by and construed in accordance with the laws of the State of New York.

DESCRIPTION OF COMMON STOCK AND PREFERRED STOCK

The following is a summary of the material terms of our common stock and preferred stock, which is based upon, and is qualified in its entirety by reference to, applicable law, our Restated Articles of Incorporation, as amended (the “Articles of Incorporation”), and our Amended and Restated Bylaws (the “Bylaws”). This summary may not contain all the information that is important to you; you can obtain additional information regarding our Articles of Incorporation and Bylaws by referring to such documents, copies of which are included as exhibits to the registration statement of which this prospectus forms a part.

Under our Articles of Incorporation, we have authority to issue 800,000,000 shares of common stock, no par value, and 50,000,000 shares of preferred stock. No other classes of capital stock are authorized under our Articles of Incorporation. As of June 30, 2021, there were 379,695,134 shares of common stock and 1,250,000 shares of preferred stock issued and outstanding. All shares of common stock and preferred stock will, when issued pursuant to this prospectus, be duly authorized, fully paid and nonassessable. We may issue our common stock and preferred stock from time to time upon such terms and for such consideration as may be determined by our board of directors. Such further issuances, up to the aggregate amounts authorized by our Articles of Incorporation, will not require approval by our shareholders. We may also issue common stock from time to time under dividend reinvestment and employee benefit plans.

Common Stock

Dividend Rights

Holders of our common stock, subject to any prior rights or preferences of any of our preferred stock then outstanding, have equal rights to receive dividends if and when declared by our board of directors out of funds legally available therefor.

Rights Upon Liquidation

In the event we are liquidated, dissolved or our affairs are wound up, after we pay or make adequate provision for all of our known debts and liabilities, each holder of common stock will receive distributions pro rata out of assets that we can legally use to pay distributions, subject to the rights of the holders of any of our preferred stock then outstanding.

Voting Rights

Except as otherwise provided by law, holders of our common stock have voting rights on the basis of one vote per share on each matter submitted to a vote at a meeting of shareholders, subject to any class or series voting rights of holders of our preferred stock then outstanding. Our shareholders may not cumulate votes in elections of directors. As a result, the holders of our common stock (and, if issued, any preferred stock with the right to vote in the election of directors) entitled to exercise more than 50% of the voting rights in an election of directors can elect all of the directors to be elected.

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Other Rights

Holders of our common stock have no preemptive rights to subscribe for additional shares of common stock or any of our other securities, nor do holders of our common stock have any redemption or conversion rights.

Listing

Our common stock is listed on the New York Stock Exchange under the symbol “EIX.”

Transfer Agent and Registrar

As of the date of this prospectus, the transfer agent and registrar for our common stock is Equiniti Trust Company.

Preferred Stock

In the event that we issue any series of preferred stock pursuant to this prospectus, we will describe the terms of such series of preferred stock in an applicable prospectus supplement.

Our board of directors is authorized, without the need for a vote or other action of our shareholders, to cause the issuance of shares of our preferred stock from time to time in one or more series and to determine the number of shares and designation of the preferred stock of any series, to increase or decrease (but not below the number of shares of such series then outstanding) the number of shares of any such series subsequent to the issuance of shares of that series, and to determine or alter the rights, preferences, privileges and restrictions granted to or imposed upon such series, which may include, among other things, dividend and liquidation rights and preferences, rights to convert such shares into common stock, voting rights and other rights. Accordingly, our board of directors, without a vote or other action by our shareholders, could cause the issuance of preferred stock in one or more series and, with respect to each series, fix the number of shares constituting that series and establish the rights, preferences, privileges and restrictions of that series, which may include, among other things, dividend and liquidation rights and preferences, rights to convert such shares into common stock, voting rights and other rights which may dilute or otherwise adversely affect the voting or other rights and the economic interests of holders of our common stock or one or more other series of our preferred stock, if any, then outstanding.

If we issue preferred stock with voting rights, it could make it more difficult for a third party to acquire control of us and could adversely affect the rights of holders of our common stock. Under some circumstances, control of us could shift from the holders of common stock to the holders of preferred stock with voting rights. Certain fundamental matters requiring stockholder approval may also require approval by the separate vote of the holders of preferred stock in addition to any required vote of the common stock.

We may or may not seek to list any particular series of preferred stock on a national securities exchange or to provide for it to be quoted on an inter-dealer quotation system. We will determine the transfer agent and registrar for any particular series of preferred stock when and if issued.

Anti-Takeover Effects of our Articles of Incorporation and Bylaws

Certain provisions of our Articles of Incorporation and Bylaws could have the effect of delaying, deterring or preventing another party from acquiring or seeking to acquire control of us. These provisions are intended to discourage certain types of coercive takeover practices and inadequate takeover bids and to encourage anyone seeking to acquire control of us to negotiate first with our board of directors. However, these provisions could also delay, deter or prevent a change of control or other takeover of our company that our shareholders might consider to be in their best interests, including transactions that might result in a premium being paid over the

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market prices of our common stock and any outstanding preferred stock, and may also limit the price that investors are willing to pay in the future for our common stock and any outstanding preferred stock. These provisions may also have the effect of preventing changes in our management. Our Articles of Incorporation and Bylaws include anti-takeover provisions that:

Limitation on Liability of Directors; Indemnification of Directors and Officers

Our Articles of Incorporation provide that the liability of our directors for monetary damages shall be eliminated to the fullest extent permissible under California law. Section 317 of the Corporations Code of the State of California permits a corporation to provide indemnification to its directors, officers and agents under certain circumstances. Our Bylaws provide for mandatory indemnification of our directors and officers, subject to the limitations set forth therein. In addition, our Articles of Incorporation provide us with the power, by bylaw, agreement or otherwise, to indemnify our directors, officers and other agents to the fullest extent permissible under California law and, subject to certain limitations, in excess of the indemnification otherwise expressly permitted by Section 317 of the Corporations Code. We believe that this limitation of liability and these indemnification provisions are useful to attract and retain qualified directors and officers.

PLAN OF DISTRIBUTION

We may sell the securities registered pursuant to this prospectus in one or more of the following ways from time to time:

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We, directly or through agents or dealers, may sell, and any underwriters may resell, our securities in one or more transactions:

We will name any underwriter, dealer or agent involved in the offer and sale of securities in the applicable prospectus supplement. In addition, we will describe in the applicable prospectus supplement the public offering or purchase price and the proceeds we will receive from the sale of our securities, any compensation we will pay to underwriters, dealers or agents in connection with such offering of our securities, any discounts, concessions or commissions allowed or re-allowed by underwriters to participating dealers, and any exchanges on which our securities will be listed.

Dealers and agents participating in the distribution of our securities may be deemed to be underwriters, and any discounts and commissions received by them and any profit realized by them on resale of the securities may be deemed to be underwriting discounts and commissions. We may enter into agreements to indemnify underwriters, dealers and agents against certain civil liabilities, including liabilities under the Securities Act, and to reimburse these persons for certain expenses. We may also agree to contribute to payments that the underwriters, dealers or agents or any of their controlling persons may be required to make in respect of such liabilities. We may grant underwriters who participate in the distribution of the securities we are registering pursuant to this prospectus an option to purchase additional securities in connection with a subsequent distribution. Certain underwriters, dealers or agents and their associates may engage in transactions with and perform services for us in the ordinary course of our business.

To facilitate a securities offering, certain persons participating in the offering may engage in sales in excess of the offering size, short covering transactions and penalty bids or stabilizing transactions in accordance with Regulation M under the Exchange Act. These activities, which may raise or maintain the market price of the common stock or preferred stock above independent market levels or prevent or retard a decline in the market price of the common stock or preferred stock include:

The applicable prospectus supplement will describe any such activities. Should any of these activities be undertaken, they may be discontinued at any time.

EXPERTS

The financial statements and management’s assessment of the effectiveness of internal control over financial reporting (which is included in Management’s Report on Internal Control over Financial Reporting)

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incorporated in this prospectus by reference to the Annual Report on Form 10-K for the year ended December 31, 2023 have been so incorporated in reliance on the report of PricewaterhouseCoopers LLP, an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

VALIDITY OF THE SECURITIES

The validity of the securities offered by this prospectus will be passed upon for Edison International by Michael A. Henry, its Assistant General Counsel, and for any underwriters by Cleary Gottlieb Steen & Hamilton LLP, New York, New York.

Mr. Henry is a salaried employee of Southern California Edison Company and earns stock-based compensation based on Edison International’s common stock. Additionally, he may hold Edison International stock-based interests through an employee benefit plan and can participate in an Edison International shareholder dividend reinvestment and stock purchase plan and/or an Edison International Employee Stock Purchase Plan.

Cleary Gottlieb Steen & Hamilton LLP, New York, New York has from time to time provided, and may provide in the future, legal services to Edison International and its affiliates.

WHERE YOU CAN FIND MORE INFORMATION

Available Information

We file annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission. You can access the documents we file electronically with the Securities and Exchange Commission from the website http://www.sec.gov.

You may also review reports, proxy statements and other information about Edison International at our offices at 2244 Walnut Grove Avenue, Rosemead, California 91770. You may view and obtain copies of some of those reports and other information on our web site at http://www.edison.com. Except for the documents specifically incorporated by reference into this prospectus, information contained on Edison International’s web site or that can be accessed through its web site does not constitute part of this prospectus.

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission. You may obtain the full registration statement from the Securities and Exchange Commission or us, as indicated below. We filed the indenture and other documents establishing the terms of the offered securities as exhibits to the registration statement. Statements in this prospectus or any supplement about these documents are summaries. You should refer to the actual documents for a more complete description of the relevant matters.

Incorporation by Reference

The rules of the Securities and Exchange Commission allow us to “incorporate by reference” into this prospectus, which means that we can disclose important information to you by referring you to another document filed separately with the Securities and Exchange Commission. The information incorporated by reference is considered to be part of this prospectus, and later information that we file with the Securities and Exchange Commission will automatically update and supersede the earlier information. Information that is furnished, rather than filed, on certain of our Current Reports on Form 8-K is not incorporated by reference in this prospectus, unless such information is expressly incorporated herein by a reference in such furnished Current Report on Form 8-K or other furnished document. This prospectus incorporates by reference the documents listed below

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that we have previously filed or may file in the future with the Securities and Exchange Commission. These documents contain important information about Edison International.

Upon request, we will provide a copy of any of these filings without charge to each person to whom a copy of this prospectus has been delivered. You may request a copy of these filings by writing or calling us at:

Edison International

2244 Walnut Grove Avenue

P.O. Box 976

Rosemead, California 91770

Attention: Corporate Governance

Telephone (626) 302-4008

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Edison International

$    % Senior Notes Due 20 

PROSPECTUS SUPPLEMENT

(To Prospectus dated July 25, 2024)

Joint Book-Running Managers

October  , 2024