[144] Similarweb Ltd. SEC Filing

Rhea-AI Filing Summary

Similarweb Ltd. (SMWB) filed a Form 144 to report a proposed sale of 100,000 ordinary shares through Oppenheimer & Co. on the NYSE with an approximate aggregate market value of $972,000 and an indicated approximate sale date of 09/08/2025. The filing states there are 82,618,511 shares outstanding. The shares to be sold were originally acquired as founder shares from the issuer on 02/09/2009 (total founder holdings shown as 3,796,106 shares) and were paid for in cash. The filer reports no securities sold in the past three months and includes the customary representation that the seller is not aware of undisclosed material adverse information.

Positive

• Compliance disclosure: Form 144 filed and sale routed through a registered broker (Oppenheimer & Co.), providing transparency.
• Long-term holding: Shares to be sold are founder shares acquired in 2009, indicating the seller held these securities for many years.

Negative

• None.

Insights

Securities Analyst

TL;DR: Routine insider notice for a small secondary sale; not materially dilutive given outstanding shares.

The Form 144 documents a proposed brokered sale of 100,000 ordinary shares valued at $972,000. Relative to the issuer's stated outstanding share count of 82,618,511, the transaction represents roughly 0.12% of the outstanding stock, indicating limited direct market impact. The shares are identified as founder shares acquired in 2009 and paid in cash, which suggests long-term holdings being partially monetized. No prior sales in the past three months are reported, and the filing includes the standard attestation regarding material nonpublic information.

Corporate Governance Expert

TL;DR: Compliance-focused disclosure; standard insider sale notice with longstanding founder holdings.

The document is a compliance disclosure under Rule 144 detailing an intended sale via a registered broker. It confirms the seller's representation about lack of undisclosed material information and shows the securities were acquired as founder shares in 2009. From a governance perspective, the filing fulfills procedural requirements and provides transparency about an insider liquidity event, without indicating governance changes or extraordinary transactions.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	Oppenheimer & Co Inc 85 Broad Street New York NY 10004	100000	972000.00	82618511	09/08/2025	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	02/09/2009	Founder Shares	Issuer			3796106	02/09/2009	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

Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What did Similarweb (SMWB) report on the Form 144?

The Form 144 reports a proposed sale of 100,000 ordinary shares via Oppenheimer & Co. on the NYSE with an aggregate market value of $972,000 and an approximate sale date of 09/08/2025.

How many shares of Similarweb are outstanding according to the filing?

The filing lists 82,618,511 shares outstanding.

When and how were the shares being sold originally acquired?

The shares were acquired as founder shares on 02/09/2009 from the issuer and the payment was in cash.

Does the filing report any other sales by the same person in the past three months?

No. The Form 144 explicitly states "Nothing to Report" for securities sold during the past three months by the person for whose account the securities are to be sold.

Who is the broker handling the proposed sale?

The broker named in the filing is Oppenheimer & Co. Inc, 85 Broad Street, New York, NY 10004.