Similarweb plans potential sale of 534,605 shares

Similarweb Ltd. filed to permit the resale of ordinary shares under a planned Rule 144 transaction.

Rhea-AI Filing Summary

Similarweb Ltd. filed to permit the resale of ordinary shares under a planned Rule 144 transaction. The notice covers 534,605 ordinary shares, with an indicated aggregate market value of $4,699,177.95, to be sold through Oppenheimer & Co. Inc. on the NYSE beginning on August 13, 2026.

The filing also lists recent share acquisitions. These include 228,500 and 200,000 shares acquired on August 13, 2026 upon exercise of employee stock options for cash, plus open-market purchases of 3,105 shares on May 18, 2026, 53,000 shares on May 19, 2026, and 50,000 shares on June 1, 2026, all paid in cash.

Key Figures

Shares planned for resale: 534,605 shares Aggregate market value: $4,699,177.95 Planned sale start date: 08/13/2026 +5 more

8 metrics

Shares planned for resale 534,605 shares Ordinary shares covered by the Form 144 notice

Aggregate market value $4,699,177.95 Indicated value of 534,605 ordinary shares

Planned sale start date 08/13/2026 Proposed date sales may begin on NYSE

Option exercise shares (1) 228,500 shares Shares acquired 08/13/2026 upon exercise of employee stock options for cash

Option exercise shares (2) 200,000 shares Shares acquired 08/13/2026 upon exercise of employee stock options for cash

Open-market purchase 05/18/2026 3,105 shares Purchase in open market for cash

Open-market purchase 05/19/2026 53,000 shares Purchase in open market for cash

Open-market purchase 06/01/2026 50,000 shares Purchase in open market for cash

Key Terms

Securities To Be Sold, employee stock options, Purchase in open market, Cash payment upon exercise of stock options

4 terms

Securities To Be Sold regulatory

"144: Securities To Be Sold Ordinary shares | 08/13/2026"

employee stock options financial

"Shares acquired upon exercise of employee stock options | SIMILARWEB LTD."

Employee stock options are contracts that give workers the right to buy a company's shares at a set price sometime in the future, like a coupon that lets you purchase stock at today’s price later on. Investors care because they align employees’ incentives with company performance and create a potential future claim on shares that can reduce existing owners’ percentage and add to a company’s reported compensation costs.

Purchase in open market financial

"05/18/2026 | Purchase in open market | Open Market |"

Cash payment upon exercise of stock options financial

"08/13/2026 | Cash payment upon exercise of stock options"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does Similarweb (SMWB) disclose in this Form 144 filing?

Similarweb discloses a planned resale of 534,605 ordinary shares with an aggregate market value of $4,699,177.95, to be sold through Oppenheimer & Co. Inc. on the NYSE beginning August 13, 2026.

How many Similarweb (SMWB) shares are planned for sale and on which market?

The filing lists 534,605 ordinary shares planned for potential sale on the NYSE. Oppenheimer & Co. Inc. is named as the broker, with an indicated aggregate market value of $4,699,177.95 as of the notice.

When can the planned sale of Similarweb (SMWB) shares start under this Form 144?

The planned sale may begin on August 13, 2026. The notice specifies this date as the proposed sale start for the 534,605 Similarweb ordinary shares referenced in the Form 144 filing through Oppenheimer & Co. Inc.

What recent option exercises in Similarweb (SMWB) shares are disclosed?

The filing lists option-related acquisitions of 228,500 and 200,000 ordinary shares on August 13, 2026, each described as shares acquired upon exercise of employee stock options, with settlement via cash payment upon exercise of stock options.

What recent open-market purchases of Similarweb (SMWB) shares are reported?

Open-market purchases include 3,105 shares on May 18, 2026, 53,000 shares on May 19, 2026, and 50,000 shares on June 1, 2026, each labeled as Purchase in open market with consideration paid in cash.

Does Similarweb (SMWB) receive proceeds from the Form 144 share sale?

The filing describes a resale of existing ordinary shares by a holder through Oppenheimer & Co. Inc. It lists planned sales and prior acquisitions but does not describe the transaction as a primary capital-raising sale by Similarweb.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/14/2026 - 07:58 AM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001910424
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	SIMILARWEB LTD.
SEC File Number	001-40394
Address of Issuer	33 Yitzhak Rabin Rd. Givatayim ISRAEL 5348303
Phone	972 (73) 320-4086
Name of Person for Whose Account the Securities are To Be Sold	Or Offer
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Ordinary shares	Oppenheimer & Co. Inc. 85 Broad St. New York NY 10004	534605	4699177.95	86962202	08/13/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Ordinary shares	08/13/2026	Shares acquired upon exercise of employee stock options	SIMILARWEB LTD.			228500	08/13/2026	Cash payment upon exercise of stock options
Ordinary shares	08/13/2026	Shares acquired upon exercise of employee stock options	SIMILARWEB LTD.			200000	08/13/2026	Cash payment upon exercise of stock options
Ordinary shares	05/18/2026	Purchase in open market	Open Market			3105	05/18/2026	Cash
Ordinary shares	05/19/2026	Purchase in open market	Open Market			53000	05/19/2026	Cash
Ordinary shares	06/01/2026	Purchase in open market	Open Market			50000	06/01/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	08/13/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	Or Offer By: /s/ Meirav Shemesh Title: Authorized Signatory, Oppenheimer Israel (pursuant to delegation)
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)