Similarweb (NASDAQ: SMWB) CEO adds 56,105 Ordinary Shares in open-market buys

Rhea-AI Filing Summary

SIMILARWEB LTD. Chief Executive Officer Offer Or reported open-market purchases of the company’s Ordinary Shares. On May 18–19, 2026, he bought a total of 56,105 shares at prices ranging from $3.20 to $3.58 per share. Following these transactions, he directly owns 4,694,396 Ordinary Shares. The filing notes that the reported prices are weighted averages and that detailed trade breakdowns are available on request.

Insider Trade Summary

Net Buyer: 56,105 shares ($199,586)

Net Buy 3 txns

Insider Offer Or

Role Chief Executive Officer

Bought 56,105 shs ($200K)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares	50,000	$3.58	$179K
Purchase	Ordinary Shares	3,000	$3.55	$11K
Purchase	Ordinary Shares	3,105	$3.20	$10K

Holdings After Transaction: Ordinary Shares — 4,691,396 shares (Direct, null)

Footnotes (1)

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Key Figures

Total shares purchased: 56,105 shares Shares bought at $3.20: 3,105 shares Shares bought at $3.58: 50,000 shares +2 more

5 metrics

Total shares purchased 56,105 shares Open-market purchases on May 18–19, 2026

Shares bought at $3.20 3,105 shares Open-market purchase on May 18, 2026

Shares bought at $3.58 50,000 shares Open-market purchase on May 19, 2026

Shares bought at $3.55 3,000 shares Open-market purchase on May 19, 2026

Post-transaction holdings 4,694,396 shares Direct ownership after trades

Key Terms

open-market purchase, Ordinary Shares, weighted average price, Form 4

4 terms

open-market purchase financial

"transaction_action: "open-market purchase" for each Ordinary Shares trade"

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" for all reported transactions"

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.

weighted average price financial

"The price reported is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

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.

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)
05/18/2026

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	05/18/2026		P		3,105	A	$3.2	4,641,396	D
Ordinary Shares	05/19/2026		P		50,000	A	$3.58(1)	4,691,396	D
Ordinary Shares	05/19/2026		P		3,000	A	$3.55	4,694,396	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:

1. The price reported is a weighted average price. The reporting person undertakes to provide full information, regarding the number of shares and prices at which the transaction was effectuated, upon request.

	Or Offer by: Oppenheimer Israel, as Attorney-in-fact	05/20/2026
	** 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 transactions did Similarweb (SMWB) CEO Offer Or report?

Offer Or reported open-market purchases of Similarweb Ordinary Shares. He bought 56,105 shares on May 18–19, 2026, at prices between $3.20 and $3.58 per share, increasing his direct ownership position.

How many Similarweb (SMWB) shares does the CEO hold after these trades?

After the reported purchases, Offer Or directly holds 4,694,396 Similarweb Ordinary Shares. This total reflects his position immediately following the May 18–19, 2026 open-market transactions disclosed in the Form 4 filing.

At what prices did the Similarweb (SMWB) CEO buy shares?

Offer Or’s reported purchases occurred at weighted average prices around $3.20 and $3.55–$3.58 per share. The filing notes that he will provide the exact number of shares and specific trade prices upon request.

How many Similarweb (SMWB) shares did the CEO buy in total?

Across three open-market transactions, Offer Or bought a total of 56,105 Ordinary Shares. Individual trades covered 3,105 shares at $3.20, 50,000 shares at $3.58, and 3,000 shares at $3.55 per share, according to the Form 4.

Were the Similarweb (SMWB) CEO’s transactions open-market purchases?

Yes. Each transaction is coded as an open-market or private purchase (transaction code P). The Form 4 describes them as open-market purchases of Ordinary Shares, with weighted average prices disclosed and more detailed pricing available upon request.