Director Rapaport-Dagim buys 40,000 Similarweb (NYSE: SMWB) shares

Rhea-AI Filing Summary

SIMILARWEB LTD. director Tamar Rapaport-Dagim reported an open-market purchase of Ordinary Shares. On May 18, 2026, she bought 40,000 Ordinary Shares at a weighted average price of $3.222 per share.

After this transaction, Rapaport-Dagim directly holds 63,584 Ordinary Shares of Similarweb. The reported price is an average; she has undertaken to provide the full breakdown of share amounts and prices upon request.

Insider Trade Summary

Net Buyer: 40,000 shares ($128,880)

Net Buy 1 txn

Insider Rapaport-Dagim Tamar

Role null

Bought 40,000 shs ($129K)

Type	Security	Shares	Price	Value
Purchase	Ordinary Shares	40,000	$3.222	$129K

Holdings After Transaction: Ordinary Shares — 63,584 shares (Direct, null)

Footnotes (1)

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Key Figures

Shares purchased: 40,000 shares Purchase price: $3.222 per share Post-transaction holdings: 63,584 shares +1 more

4 metrics

Shares purchased 40,000 shares Open-market purchase of Ordinary Shares on May 18, 2026

Purchase price $3.222 per share Weighted average price for the 40,000 Ordinary Shares bought

Post-transaction holdings 63,584 shares Ordinary Shares directly held after the reported transaction

Net buy direction 40,000 shares net buy transactionSummary netBuySellShares and netBuySellDirection

Key Terms

open-market purchase, weighted average price, Ordinary Shares

3 terms

open-market purchase financial

"reported an open-market purchase of Ordinary Shares"

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.

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.

Ordinary Shares financial

"bought 40,000 Ordinary Shares at a weighted average price"

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 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^*

Rapaport-Dagim Tamar

(Last) (First) (Middle)

631 MARYVILLE CENTRE DRIVE

SUITE 200

(Street)

SAINT LOUIS MISSOURI 63141

(City) (State) (Zip)

UNITED STATES

(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
	Officer (give title below)		Other (specify below)

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		40,000	A	$3.222(1)	63,584	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.

	Tamar Rapaport Dagim by: Oppenheimer Israel, as Attorney-in-fact	05/19/2026
	** 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 Tamar Rapaport-Dagim?

Similarweb reported that director Tamar Rapaport-Dagim bought 40,000 Ordinary Shares in an open-market transaction. The purchase occurred on May 18, 2026, and was reported as a Form 4 insider filing with the U.S. Securities and Exchange Commission.

At what price did Tamar Rapaport-Dagim buy Similarweb (SMWB) shares?

Tamar Rapaport-Dagim purchased Similarweb Ordinary Shares at a weighted average price of $3.222 per share. The filing notes she can provide full details of the individual trade prices and share amounts that make up this average, if investors or regulators request them.

How many Similarweb (SMWB) shares does Tamar Rapaport-Dagim hold after this trade?

After the reported purchase, Tamar Rapaport-Dagim directly holds 63,584 Ordinary Shares of Similarweb. This total reflects her prior holdings plus the newly acquired 40,000 shares disclosed in the Form 4 insider trading report filed with the Securities and Exchange Commission.

Was Tamar Rapaport-Dagim’s Similarweb (SMWB) trade an open-market purchase?

Yes. The transaction is coded as an open-market purchase, meaning shares were bought in the market rather than granted as compensation. The filing identifies transaction code “P,” which the SEC defines as a purchase in an open-market or private transaction for cash consideration.

What does the weighted average price mean in the Similarweb (SMWB) Form 4?

The weighted average price of $3.222 indicates multiple trades were executed at different prices, then averaged by share volume. The filing states that Tamar Rapaport-Dagim will provide detailed information on each price level and number of shares traded if such information is specifically requested.