Or Offer - 26 Aug 2026 Form 4 Insider Report for SIMILARWEB LTD. (SMWB)

Reporting relationship: Chief Executive Officer
Issuer ticker: SMWB
Reported as of: 26 Aug 2026
Net transaction value: -$3,449,641
SEC form: 4
Accepted by SEC: 27 Aug 2026, 08:03:15 UTC
Prior SEC filing: 17 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Meirav Shemesh on behalf of Oppenheimer Israel, as Attorney-in-fact

Key filing fact

Or Offer filed Form 4 for SIMILARWEB LTD. (SMWB) on 27 Aug 2026.

Key facts

This page summarizes Or Offer's Form 4 filing for SIMILARWEB LTD. (SMWB).
12 reported transactions and 4 derivative rows are listed below.
Accepted by SEC: 27 Aug 2026, 08:03.

Change

Previous filing in this sequence was filed on 17 Aug 2026.
Current net transaction value: -$3,449,641.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001910424 Primary reporting owner

Offer Or

Relationship: Chief Executive Officer
Address: 87 HAZOREA ST., KFAR SHMARYAHU, ISRAEL
Signature: /s/ Meirav Shemesh on behalf of Oppenheimer Israel, as Attorney-in-fact
Signature date: 27 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SMWB transaction

Ordinary shares

Options Exercise

Transaction value
Shares: +164,817
Change %: +3.6%
Price: $2.71^*
Shares after: 4,763,108
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F2

SMWB transaction

Ordinary shares

Sale

Transaction value: $1,483,452
Shares: -164,817
Change %: -3.5%
Price: $9.00
Shares after: 4,598,291
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F3

SMWB transaction

Ordinary shares

Options Exercise

Transaction value
Shares: +39,302
Change %: +0.85%
Price: $2.71^*
Shares after: 4,637,593
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F2

SMWB transaction

Ordinary shares

Sale

Transaction value: $354,194
Shares: -39,302
Change %: -0.85%
Price: $9.01
Shares after: 4,598,291
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F4

SMWB transaction

Ordinary shares

Options Exercise

Transaction value
Shares: +39,000
Change %: +0.85%
Price: $0.4000^*
Shares after: 4,637,291
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F2

SMWB transaction

Ordinary shares

Sale

Transaction value: $351,168
Shares: -39,000
Change %: -0.84%
Price: $9.00
Shares after: 4,598,291
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F5

SMWB transaction

Ordinary shares

Options Exercise

Transaction value
Shares: +140,008
Change %: +3%
Price: $3.04^*
Shares after: 4,738,299
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F2

SMWB transaction

Ordinary shares

Sale

Transaction value: $1,260,828
Shares: -140,008
Change %: -3%
Price: $9.01
Shares after: 4,598,291
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F6

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SMWB transaction Derivative

Options to purchase one Ordinary Share

Options Exercise

Transaction value
Shares: -164,817
Change %: -29%
Price: $0.000000^*
Shares after: 400,000
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Ordinary shares
Underlying amount: 164,817
Exercise price: $2.71
Footnotes: F1

SMWB transaction Derivative

Options to purchase one Ordinary Share

Options Exercise

Transaction value
Shares: -39,302
Change %: -8.9%
Price: $0.000000^*
Shares after: 400,000
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Ordinary shares
Underlying amount: 39,302
Exercise price: $2.71
Footnotes: F1

SMWB transaction Derivative

Options to purchase one Ordinary Share

Options Exercise

Transaction value
Shares: -39,000
Change %: -5.3%
Price: $0.000000^*
Shares after: 700,000
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Ordinary shares
Underlying amount: 39,000
Exercise price: $0.4000
Footnotes: F1

SMWB transaction Derivative

Options to purchase one Ordinary Share

Options Exercise

Transaction value
Shares: -140,008
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Ordinary shares
Underlying amount: 140,008
Exercise price: $3.04
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

The options reported herein were exercised and the underlying shares were sold on the same date as reported in Table I.

Footnote F2

The shares were acquired upon the exercise of stock options

Footnote F3

The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $9.00 to $9.01. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request

Footnote F4

The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $9.012 to $9.03. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request

Footnote F5

The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $9.00 to $9.05. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request

Footnote F6

The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $9.00 to $9.055. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request