X0607 3 2026-04-10 0 0001842731 SIMILARWEB LTD. SMWB 0002115131 Beit-On Harel Moshe true 2 LEONARDO DA VINCI ST. LANDMARK TOWER, 32ND FLOOR TEL AVIV L3 6473309 1 0 0 0 Ordinary Shares 10810778 D This Form 3 has been filed after March 18, 2026 but prior to April 20, 2026 in reliance on the temporary relief made available to the directors and officers of certain foreign private issuers by the Staff of the Securities and Exchange Commission in its no-action letter dated March 13, 2026. Harel Moshe Beit-On by: Oppenheimer Israel, as Attorney-in-fact 2026-04-10