Director Joshua Alliance discloses 8.88M SMWB shares in Form 3 filing

Rhea-AI Filing Summary

SIMILARWEB LTD. director Joshua Alliance filed an initial ownership report showing his position in the company. The Form 3 indicates direct beneficial ownership of 8,883,950 Ordinary Shares, establishing his starting equity stake as a reporting insider.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Alliance Joshua

Role Director

Type	Security	Shares	Price	Value
holding	Ordinary Shares	--	--	--

Holdings After Transaction: Ordinary Shares — 8,883,950 shares (Direct)

Footnotes (1)

Key Figures

Ordinary Shares owned: 8,883,950 shares

1 metrics

Ordinary Shares owned 8,883,950 shares Direct beneficial ownership reported on Form 3

Key Terms

Form 3, Ordinary Shares, beneficial ownership

3 terms

Form 3 regulatory

"filed an initial ownership report showing his position in the company"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

Ordinary Shares financial

"beneficial ownership of 8,883,950 Ordinary Shares"

Ordinary shares are a type of ownership stake in a company, giving shareholders a right to participate in the company’s profits and decision-making through voting. They are similar to owning a piece of a business, and their value can rise or fall based on the company's performance. Investors buy ordinary shares to potentially earn dividends and benefit from the company's growth over time.

beneficial ownership financial

"indicates direct beneficial ownership of 8,883,950 Ordinary Shares"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Understanding Insider Trading Forms →

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

OMB APPROVAL

OMB Number:			3235-0104
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1. Name and Address of Reporting Person^*

Alliance Joshua

(Last) (First) (Middle)

19 ACACIA ROAD

(Street)

LONDON NW86AN

(City) (State) (Zip)

UNITED KINGDOM

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
04/13/2026

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)
Ordinary Shares	8,883,950	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:

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.

	Joshua Alliance by: Oppenheimer Israel, as Attorney-in-fact	04/13/2026
	** 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 does Joshua Alliance’s Form 3 filing for SIMILARWEB LTD. (SMWB) show?

The Form 3 shows that director Joshua Alliance holds 8,883,950 Ordinary Shares of SIMILARWEB LTD. This is an initial ownership report, establishing his disclosed equity stake when he became subject to insider reporting rules.

Is Joshua Alliance buying or selling SMWB shares in this Form 3 filing?

The filing does not report any buy or sell transaction. It is an initial ownership statement listing Joshua Alliance’s existing beneficial ownership of 8,883,950 Ordinary Shares, rather than a new purchase or sale in the market.

How many SIMILARWEB LTD. (SMWB) shares does Joshua Alliance directly own?

Joshua Alliance is reported as directly owning 8,883,950 Ordinary Shares of SIMILARWEB LTD. This figure represents his beneficial ownership position disclosed in the Form 3, with ownership classified as direct rather than through an intermediary entity.

What is the significance of a Form 3 filing for SMWB investors?

A Form 3 discloses an insider’s initial ownership when they become a reporting person. For SMWB, it informs investors that director Joshua Alliance holds 8,883,950 Ordinary Shares, providing transparency into insider equity stakes but not indicating any trading activity.

Does the SIMILARWEB LTD. (SMWB) Form 3 include any derivative securities?

The provided data show no derivative securities reported for Joshua Alliance. Only direct beneficial ownership of 8,883,950 Ordinary Shares is listed, and the derivativeSummary section is empty in this Form 3 snapshot.