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: 001-42834

REGENTIS BIOMATERIALS LTD.

(Translation of registrant’s name into English)

60 Medinat Hayehudim Street, 4676652, 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 ☐

Explanatory Note

Attached are the Company’s press release providing a business update for the first half of 2026, condensed interim unaudited financial statements and a summary of its operating and financial review and prospects, each as of June 30, 2026, furnished herewith as Exhibits 99.1, 99.2 and 99.3, respectively.

This Report on Form 6-K (including the six bullet points following “Corporate and Clinical Highlights:” in Exhibit 99.1 and Exhibits 99.2 and 99.3 ) is hereby incorporated by reference into the registrant’s Registration Statement on Form F-1 (File No. 333-297320), to be a part thereof from the date on which this report is submitted, to the extent not superseded by documents or reports subsequently filed or furnished.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.