6-K

UNITED STATESSECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUERPURSUANT TO RULE 13a-16 OR 15d-16 UNDERTHE SECURITIES EXCHANGE ACT OF 1934

Date: July 1, 2026

Commission File Number: 1-15060

UBS AG

(Translation of Registrant’s Name Into English)

Bahnhofstrasse45, Zurich, Switzerland, andAeschenvorstadt 1, Basel, Switzerland**(Address of principal executive office)**

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

This Form 6-K is hereby incorporated by reference into the registration statement of UBS AG on Form F-3 (Registration Number 333-283672).

This Form 6-K consists of the Opinion of Hogan Lovells Cadwalader US LLP, as special U.S. tax counsel to UBS AG (“UBS”), which appears as an exhibit hereto and is incorporated into this Form 6-K as if set forth in full herein. The Opinion of Hogan Lovells Cadwalader US LLP is filed herewith as Exhibit 8.4 to the Registration Statement of UBS AG on Form F-3 initially filed on December 6, 2024 and effective February 6, 2025 (File No. 333-283672) and replaces the existing Opinion of Cadwalader, Wickersham & Taft LLP dated December 6, 2024, as special U.S. tax counsel to UBS filed therewith as Exhibit 8.4.

SIGNATURES

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

Date: 1^st^ July 2026

Exhibit 8.4

Opinion of Hogan Lovells Cadwalader US LLP

[LETTERHEAD OF HOGAN LOVELLS CADWALADER US LLP]

July 1, 2026

UBS AG

Bahnhofstrasse 45

CH-8098 Zurich

Switzerland

Ladies and Gentlemen:

As special U.S. tax counsel to UBS AG (the “Company”) in connection with the registration of an unspecified aggregate initial offering price or number of the debt securities to be issued (on a delayed and continuous basis) by the Company, pursuant to the base prospectus (the “Base Prospectus”), prospectus supplements (“Prospectus Supplement”), free writing prospectuses (“FWP”) and pricing supplements ( “Pricing Supplements” and, together with the Base Prospectus, Prospectus Supplements and FWP, the “Prospectus”) that forms a part of the registration statement on Form F-3 (the “Registration Statement”) of the Company filed with the Securities and Exchange Commission on December 6, 2024 and to which this Opinion is being incorporated by reference as an Exhibit, we hereby confirm to you that the discussions that refer to our name set forth under the headings “U.S. Tax Considerations”, “Supplemental U.S. Tax Considerations”, “Tax Considerations”, “What are the Tax Consequences of the Notes?”, “What are the Tax Consequences of the Securities”, “Supplemental discussion of U.S. federal income tax consequences” and headings of similar import contained in the Prospectus in the Registration Statement is our opinion, subject to the limitations set forth therein.

We hereby consent to the filing of this opinion as an exhibit to the Registration Statement and to each reference to us under the above-specified headings in the Prospectus in the Registration Statement. This consent is not to be construed as an admission that we are a person whose consent is required to be filed with the Registration Statement under the provisions of the Securities Act of 1933, as amended.

Very truly yours,

/s/ Hogan Lovells Cadwalader US LLP