SEC Form 6-K filed by Alpha Tau Medical Ltd.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO SECTION 13A-16 OR 15D-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2026

Commission File Number: 001-41316

Alpha Tau Medical Ltd.

(Exact Name of Registrant as Specified in Its Charter)

Kiryat HaMada St. 5

Jerusalem, Israel 9777605

+972 (3) 577-4115

(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 April 23, 2026, Alpha Tau Medical Ltd. (the “Company”) issued two press releases titled “Alpha Tau Successfully Treats First Pancreatic Cancer Patient in Europe with Alpha DaRT® in French Multicenter ACAPELLA Clinical Trial” and “Alpha Tau Announces FDA Approval of IDE Supplement to Expand Alpha DaRT® IMPACT Trial to Patients with Pancreatic Cancer Receiving Gemcitabine with Abraxane® (Nab-Paclitaxel).” A copy of both press releases are attached to this Form 6-K as Exhibit 99.1 and 99.2, respectively.

The information in this Report on Form 6-K, including Exhibit 99.1 and 99.2 attached hereto, is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filing made by the Company under the Securities Act of 1933, as amended, or the Exchange Act, except as otherwise set forth herein or as shall be expressly set forth by specific reference in such a filing.

EXHIBIT INDEX

SIGNATURES

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

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