UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of September 2026

Commission File Number: 001-41402

BRENX LTD.

(Translation of registrant’s name into English)

13 Amal St. 4th Floor, Park Afek

Rosh Haayin, 4809249 Israel

(Address of principal executive offices)

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 ☐

CONTENTS

On September 9, 2026, BrenX Ltd., or the Company, issued a press release titled “BrenX Reports First Half 2026 Financial Results and Advances Integrated Energy Infrastructure Strategy”. A copy of this press release is furnished with this Report of Foreign Private Issuer on Form 6-K, or this Form 6-K, as Exhibit 99.1. In addition, the Company is furnishing its unaudited condensed consolidated financial statements as of and for the six month period ended June 30, 2026 as Exhibit 99.2 to this Form 6-K and is furnishing its Management’s Discussion and Analysis of Financial Condition and Results of Operations, which discusses and analyzes the Company’s financial condition and results of operations as of and for the six month period ended June 30, 2026, as Exhibit 99.3 to this Form 6-K.

This Form 6-K (other than the second, third, fourth and fifth paragraphs and the section titled “Forward Looking Statements” of Exhibit 99.1 furnished herewith) is incorporated by reference into the Company’s Registration Statements on Form F-3 (File Nos. 333-273028, 333-283874, 333-289219, 333-290642, 333-292634, 333-293660, 333-294341, 333-295594, 333-296507, 333-296898, 333-297567, and 333-298666) and Form S-8 (File Nos. 333-272266, 333-278602, 333-284377, 333-290040, and 333-298317), filed with the Securities and Exchange Commission, to be a part thereof from the date on which this Form 6-K is submitted, to the extent not superseded by documents or reports subsequently filed or furnished.

EXHIBIT INDEX

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.