SIMILARWEB (SMWB) CEO Offer Or adds 50,000 Ordinary Shares in open-market buy

Rhea-AI Filing Summary

SIMILARWEB LTD. Chief Executive Officer Offer Or reported an open-market purchase of the company’s Ordinary Shares. He bought 50,000 shares on 2026-06-01 at an average price of $4.15 per share. After this transaction, he directly owns 4,744,396 Ordinary Shares.

Insider Trade Summary

Net Buyer: 50,000 shares ($207,500)

Net Buy 1 txn

Insider Offer Or

Role Chief Executive Officer

Bought 50,000 shs ($208K)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares	50,000	$4.15	$208K

Holdings After Transaction: Ordinary Shares — 4,744,396 shares (Direct, null)

Footnotes (1)

Key Figures

Shares purchased: 50,000 shares Purchase price: $4.15 per share Post-transaction holdings: 4,744,396 shares

3 metrics

Shares purchased 50,000 shares Open-market purchase on June 1, 2026

Purchase price $4.15 per share Average price for Ordinary Shares bought

Post-transaction holdings 4,744,396 shares Ordinary Shares directly owned after transaction

Key Terms

open-market purchase, Ordinary Shares, Form 4

3 terms

open-market purchase financial

"transaction_action: "open-market purchase""

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

Ordinary Shares financial

"security_title: "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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Offer Or

(Last) (First) (Middle)

87 HAZOREA ST.

(Street)

KFAR SHMARYAHU

(City) (State) (Zip)

ISRAEL

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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

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

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

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Ordinary Shares	06/01/2026		P		50,000	A	$4.15	4,744,396	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Meirav Shemesh on behalf of Oppenheimer Israel, as Attorney-in-fact	06/02/2026
	** 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 4 (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 4: SEC 1474 (03-26)

FAQ

What insider transaction did SIMILARWEB (SMWB) report for Offer Or?

SIMILARWEB reported that CEO Offer Or completed an open-market purchase of 50,000 Ordinary Shares. The transaction occurred on June 1, 2026, and was reported as a direct ownership purchase on a Form 4 insider filing.

At what price did SIMILARWEB (SMWB) CEO Offer Or buy shares?

Offer Or purchased SIMILARWEB Ordinary Shares at an average price of $4.15 per share. This price reflects what he paid in the open-market transaction disclosed in the Form 4 insider trading report.

How many SIMILARWEB (SMWB) shares does Offer Or own after this transaction?

Following the reported purchase, Offer Or directly owns 4,744,396 SIMILARWEB Ordinary Shares. This total includes his existing holdings plus the 50,000 shares acquired in the June 1, 2026 open-market transaction.

Was the SIMILARWEB (SMWB) insider transaction a purchase or sale?

The SIMILARWEB insider transaction was a purchase. CEO Offer Or executed an open-market buy of 50,000 Ordinary Shares, as indicated by transaction code P and the filing’s description of an open-market purchase.

What type of security did SIMILARWEB (SMWB) CEO Offer Or purchase?

Offer Or purchased SIMILARWEB Ordinary Shares, the company’s primary equity security. The Form 4 filing specifies the security title as Ordinary Shares for the 50,000-share open-market transaction on June 1, 2026.