Similarweb (SMWB) director reports 23,584 restricted share units in Form 3

Rhea-AI Filing Summary

SIMILARWEB LTD. director Tamar Rapaport-Dagim reported initial ownership of 23,584 restricted share units (RSUs), each representing one ordinary share. These RSUs were granted as equity compensation and vest in equal installments over a 2-year period.

The first vesting date is August 28, 2026, and each installment is contingent on her continued service with Similarweb or its subsidiaries through the applicable vesting dates. Until vesting, the RSUs represent a contingent right rather than fully owned shares.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Rapaport-Dagim Tamar

(Last) (First) (Middle)

631 MARYVILLE CENTRE DRIVE

SUITE 200

(Street)

SAINT LOUIS MISSOURI 63141

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/26/2026

3. Issuer Name and Ticker or Trading Symbol
SIMILARWEB LTD. [ SMWB ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Restricted Share Units, each representing one Ordinary Share	23,584(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The Reporting Person was granted restricted stock units ("RSUs"), which each represent a contingent right to receive one ordinary share of Similarweb Ltd (the "Company"). The RSUs vest in 2 years period equal installments with the first vesting date on 08/28/2026 subject to the Reporting Person's continued service to the Company or its subsidiaries through each vesting date.

Remarks:

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.

	Tamar Rapaport Dagim by: Oppenheimer Israel, as Attorney-in-fact	03/26/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What did Tamar Rapaport-Dagim report in the SIMILARWEB (SMWB) Form 3?

Tamar Rapaport-Dagim reported holding 23,584 restricted share units (RSUs) in Similarweb Ltd. Each RSU represents a contingent right to receive one ordinary share, subject to future vesting conditions and continued service with the company.

How many RSUs does Tamar Rapaport-Dagim hold in SIMILARWEB (SMWB)?

She holds 23,584 restricted share units (RSUs), as disclosed in the Form 3. Each RSU corresponds to one ordinary share of Similarweb, providing potential future equity if vesting and service conditions are satisfied.

When do Tamar Rapaport-Dagim’s SIMILARWEB (SMWB) RSUs start vesting?

The first vesting date for her Similarweb RSUs is August 28, 2026. Vesting then continues in equal installments over a 2-year period, assuming she continues to provide service to Similarweb or its subsidiaries throughout the vesting schedule.

What conditions apply to Tamar Rapaport-Dagim’s SIMILARWEB (SMWB) RSU grant?

Her RSUs vest in equal installments over 2 years, starting August 28, 2026. Each installment requires her continued service with Similarweb or its subsidiaries through the applicable vesting date for the shares to be delivered.

Do Tamar Rapaport-Dagim’s RSUs in SIMILARWEB (SMWB) represent ordinary shares today?

The RSUs represent a contingent right to receive one ordinary share per unit in the future. They become actual shares only upon vesting, which depends on her continued service through each scheduled vesting date.