6-K

UNITED STATES

SECURITIES ANDEXCHANGE COMMISSION

WASHINGTON, D.C.20549

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FORM 6-K

REPORT OF FOREIGNPRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIESEXCHANGE ACT OF 1934

For the month of May 2026

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Commission File Number: 000-56491

ALR TechnologiesSG Ltd.

(Translation of registrant’s name into English)

(Address of principal executive office)

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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 ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

CONTENTS

On May 19, 2026, ALR Technologies SG Ltd. issued a press release, a copy of which is furnished as Exhibit 99.1 to this Report on Form 6-K and incorporated by reference herein.

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 undesigned, thereunto duly authorized.

Date: May 20, 2026

ALR Technologies SG Ltd.

By: s/ Sidney Chan

Name: Sidney Chan

Title: CEO

Exhibit 99.1