EQUINIX INC, 424B5 증권신고서(투자설명서, 424B)

The information in this preliminary prospectus supplement is not complete and may be changed. This preliminary prospectus supplement and the accompanying prospectus are not an offer to sell these securities and are not soliciting an offer to buy these securities in any jurisdiction where the offer or sale is not permitted.

Subject to completion, dated November 3, 2026

Preliminary Prospectus Supplement (To Prospectus Dated October 28, 2026)

Equinix Europe 2 Financing Corporation LLC

% Senior Notes due 20 % Senior Notes due 20

Unconditionally Guaranteed by Equinix, Inc.

Equinix Europe 2 Financing Corporation LLC (the “Issuer”), a Delaware limited liability company that is an indirect, wholly-owned subsidiary of Equinix, Inc., is offering aggregate principal amount of % Senior Notes due 20 (the “20 notes”), aggregate principal amount of % Senior Notes due 20 (the “20 notes”), aggregate principal amount of % Senior Notes due 20 (the “20 notes”) and aggregate principal amount of % Senior Notes due 20 (the “20 notes” and, together with the 20 notes, the 20 notes and the 20 notes, the “notes”). Interest will accrue on each series of notes from , 2026. Interest on the notes will be payable annually on of each year, commencing on , 2027. The Issuer may redeem any series of the notes in whole or in part at any time or from time to time at the redemption prices described under “Description of Notes — Optional Redemption,” which include accrued and unpaid interest thereon, if any, to, but not including, the applicable redemption date. Depending on when such notes are redeemed, a make-whole premium may or may not be payable in respect of any such redemptions.

The notes will be fully and unconditionally guaranteed on an unsecured basis by Equinix, Inc., a Delaware corporation.

The notes will be the Issuer’s unsecured senior obligations and will rank equal in right of payment to all of the Issuer’s existing and future unsecured and unsubordinated indebtedness and structurally subordinated to all of the liabilities of the Issuer’s subsidiaries, if any. In addition, Equinix, Inc.’s obligations under the guarantees will rank equally with all of its other unsecured and unsubordinated indebtedness and will be effectively subordinated to all of the existing and future secured indebtedness of Equinix, Inc. and structurally subordinated to all of the indebtedness and liabilities of other subsidiaries of Equinix, Inc. Upon a change of control triggering event, the Issuer will be required to make an offer to purchase each holder’s notes at a purchase price equal to 101% of the aggregate principal amount thereof plus accrued and unpaid interest if any, to but not including, the date of purchase.

The Issuer intends to apply to list each series of notes on the Nasdaq Bond Exchange. The Issuer expects trading in the notes on the Nasdaq Bond Exchange to begin within 30 days after their original issue date. Currently, there is no public market for the notes.

We estimate that the net proceeds from the sale of the notes offered hereby, after deducting the underwriting discounts and estimated offering expenses payable by us, will be approximately . We intend to allocate an amount equal to the net proceeds from this offering to finance or refinance, in whole or in part, one or more Eligible Green Projects (as defined in “Use of Proceeds”). Pending full allocation of an amount equal to the net proceeds of the offering of the notes, the net proceeds may be used in accordance with our general treasury policy and be held in cash, cash equivalents and U.S. government securities or used to repay existing borrowings. We will not knowingly invest any unallocated proceeds in securities directly related to fossil fuels. Payment of principal and interest on the notes will be made from our general account and will not be linked to the performance of the Eligible Green Projects.

The following is a brief summary of certain terms of this offering. For a more complete description of the terms of the notes offered hereby, see “Description of Notes” in this prospectus supplement and the section titled “Description of Debt Securities” in the accompanying prospectus.

Issuer

Equinix Europe 2 Financing Corporation LLC, a Delaware limited liability company.

Guarantor Equinix, Inc., a Delaware corporation.

Notes Offered aggregate principal amount of the 20 notes;

aggregate principal amount of the 20 notes;

and aggregate principal amount of the 20 notes.

Maturity Dates , 20 for the 20 notes, , 20 for the 20 notes, , 20 for the 20 notes and , 20 for the 20 notes.

Interest

The 20 notes will bear interest from , 2026 at the rate of % per annum, the 20 notes will bear interest from , 2026 at the rate of % per annum, the 20 notes will bear interest from , 2026 at the rate of % per annum and the 20 notes will bear interest from , 2026 at the rate of % per annum.

Interest Payment Dates 20 notes:of each year, beginning on , 2027

20 notes:of each year, beginning on , 2027

Ranking

The notes will be the Issuer’s general senior obligations. Your right to payment under these notes will be:

effectively subordinated to any of the Issuer’s existing and future secured indebtedness;

structurally subordinated to any existing and future indebtedness and other liabilities (including trade payables) of any of the Issuer’s subsidiaries, if any;

As of September 30, 2026, the Issuer had no subsidiaries and $7.3 billion of outstanding indebtedness (excluding trade payables and intercompany items and liabilities of a type not required to be reflected on the balance sheet of Equinix, Inc.’s subsidiaries in accordance with U.S. generally accepted accounting principles, or GAAP).

Guarantees

The notes will be fully and unconditionally guaranteed on an unsecured basis by Equinix, Inc. Equinix, Inc.’s obligations under the guarantees will be:

effectively subordinated to all of Equinix, Inc.’s existing and future secured indebtedness;

structurally subordinated to all of the existing and future indebtedness and other liabilities (including trade payables) of other subsidiaries of Equinix, Inc.;

As of September 30, 2026, without giving effect to this offering:

Equinix, Inc. had total consolidated indebtedness of approximately $25.0 billion, approximately $14 million of which represented secured indebtedness (excluding approximately $2.4 billion of finance lease liabilities);

Change of Control Triggering Event

Upon the occurrence of a Change of Control Triggering Event (as defined in “Description of Notes”), unless the Issuer has previously exercised the optional redemption right with respect to a given series of notes in whole, the Issuer will be required to offer to repurchase the notes of an applicable series at a price equal to 101% of the then outstanding principal amount, plus accrued and unpaid interest, if any, to, but not including, the date of repurchase. See “Description of Notes — Change of Control Triggering Event.”