144 0001910424 XXXXXXXX LIVE 0001842731 SIMILARWEB LTD. 001-40394 33 YITZHAK RABIN RD. GIVATAYIM L3 5348303 972 (73) 320-4086 Offer Or Officer Ordinary Oppenheimer & Co. Inc.

85 Broad St. New York NY 10004

10000 125000.00 74845441 11/22/2024 NYSE Ordinary 02/14/2014 Employee Stock Option Plan From The Issuer N 1074000 11/22/2024 Cash Upon Exercise N Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 08/21/2024 20000 177500.00 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 08/26/2024 5000 45250.00 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 08/27/2024 15000 139750.00 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 08/28/2024 10465 100760.50 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 11/18/2024 39241 471712.14 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 11/19/2024 8349 100257.30 Or Offer

33 YITZHAK RABIN RD GIVATAYIM L3 5348303

Ordinary 11/20/2024 43235 520720.95 Or Offer

33 YITZHAK RABIN RD, GIVATAYIM L3 5348303

Ordinary 11/21/2024 35000 435500.00 11/22/2024 Or Offer