Key facts
- This page summarizes Or Offer's Form 4 filing for SIMILARWEB LTD. (SMWB).
- 14 reported transactions and 4 derivative rows are listed below.
- Accepted by SEC: 17 Aug 2026, 08:38.
Or Offer - 13 Aug 2026 Form 4 Insider Report for SIMILARWEB LTD. (SMWB)
- Reporting relationship
- Chief Executive Officer
- Issuer ticker
- SMWB
- Reported as of
- 13 Aug 2026
- Net transaction value
- -$6,255,276
- SEC form
- 4
- Accepted by SEC
- 17 Aug 2026, 08:38:49 UTC
- Prior SEC filing
- 02 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Meirav Shemesh on behalf of Oppenheimer Israel, as Attorney-in-fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Or Offer filed Form 4 for SIMILARWEB LTD. (SMWB) on 17 Aug 2026.
Change
- Previous filing in this sequence was filed on 02 Jun 2026.
- Current net transaction value: -$6,255,276.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 17 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
- +228,500
- Change %
- +4.8%
- Price
- $3.04*
- Shares after
- 4,972,896
- Date
- 13 Aug 2026
- Ownership
- Direct
- Footnotes
- F6
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $2,015,713
- Shares
- -228,500
- Change %
- -4.6%
- Price
- $8.82
- Shares after
- 4,744,396
- Date
- 13 Aug 2026
- Ownership
- Direct
- Footnotes
- F1
SMWB
transaction
Ordinary Shares
Options Exercise
- Transaction value
- Shares
- +200,000
- Change %
- +4.2%
- Price
- $0.4000*
- Shares after
- 4,944,396
- Date
- 13 Aug 2026
- Ownership
- Direct
- Footnotes
- F6
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $1,757,280
- Shares
- -200,000
- Change %
- -4%
- Price
- $8.79
- Shares after
- 4,744,396
- Date
- 13 Aug 2026
- Ownership
- Direct
- Footnotes
- F2
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $928,419
- Shares
- -106,105
- Change %
- -2.2%
- Price
- $8.75
- Shares after
- 4,638,291
- Date
- 13 Aug 2026
- Ownership
- Direct
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $356,000
- Shares
- -40,000
- Change %
- -0.86%
- Price
- $8.90
- Shares after
- 4,598,291
- Date
- 13 Aug 2026
- Ownership
- Direct
SMWB
transaction
Ordinary Shares
Options Exercise
- Transaction value
- Shares
- +59,992
- Change %
- +1.3%
- Price
- $3.04*
- Shares after
- 4,658,283
- Date
- 14 Aug 2026
- Ownership
- Direct
- Footnotes
- F6
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $533,965
- Shares
- -59,992
- Change %
- -1.3%
- Price
- $8.90
- Shares after
- 4,598,291
- Date
- 14 Aug 2026
- Ownership
- Direct
- Footnotes
- F3
SMWB
transaction
Ordinary Shares
Options Exercise
- Transaction value
- Shares
- +75,000
- Change %
- +1.6%
- Price
- $0.4000*
- Shares after
- 4,673,291
- Date
- 14 Aug 2026
- Ownership
- Direct
- Footnotes
- F6
SMWB
transaction
Ordinary Shares
Sale
- Transaction value
- $663,900
- Shares
- -75,000
- Change %
- -1.6%
- Price
- $8.85
- Shares after
- 4,598,291
- Date
- 14 Aug 2026
- Ownership
- Direct
- Footnotes
- F4
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
- -228,500
- Change %
- -53%
- Price
- $0.000000*
- Shares after
- 200,000
- Date
- 13 Aug 2026
- Ownership
- Direct
- Underlying class
- Ordinary shares
- Underlying amount
- 228,500
- Exercise price
- $3.04
- Footnotes
- F5
SMWB
transaction
Derivative
Options to purchase one Ordinary Share
Options Exercise
- Transaction value
- Shares
- -200,000
- Change %
- -20%
- Price
- $0.000000*
- Shares after
- 814,000
- Date
- 13 Aug 2026
- Ownership
- Direct
- Underlying class
- Ordinary shares
- Underlying amount
- 200,000
- Exercise price
- $0.4000
- Footnotes
- F5
SMWB
transaction
Derivative
Options to purchase one Ordinary Share
Options Exercise
- Transaction value
- Shares
- -59,992
- Change %
- -30%
- Price
- $0.000000*
- Shares after
- 140,008
- Date
- 14 Aug 2026
- Ownership
- Direct
- Underlying class
- Ordinary shares
- Underlying amount
- 59,992
- Exercise price
- $3.04
- Footnotes
- F5
SMWB
transaction
Derivative
Options to purchase one Ordinary Share
Options Exercise
- Transaction value
- Shares
- -75,000
- Change %
- -9.2%
- Price
- $0.000000*
- Shares after
- 739,000
- Date
- 14 Aug 2026
- Ownership
- Direct
- Underlying class
- Ordinary shares
- Underlying amount
- 75,000
- Exercise price
- $0.4000
- Footnotes
- F5
* 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 price reported is a weighted average price. These shares were sold in multiple transactions ranging from $8.66 to $9.005. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request
Footnote F2
The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $8.69 to $8.88. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request
Footnote F3
The price reported is a weighted average price. These shares were sold in multiple transactions ranging from $8.90 to $8.92. 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 $8.85 to $8.87. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request
Footnote F5
The options reported herein were exercised and the underlying shares were sold on the same date as reported in Table I.
Footnote F6
The shares were acquired upon the exercise of stock options