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About SIMILARWEB LTD. (SMWB)
SIMILARWEB LTD. is an SEC registrant, filing under CIK 0001842731, classified as computer programming, data processing, etc. We track it alongside the rest of the Information Technology sector.
SMWB Form 4 activity by transaction type, last 90 days
| Form 4 transaction type | Transactions | Shares | Total value |
|---|---|---|---|
| Open-market sale | 24 | 1,760,534 | $15.17M |
| Option exercise | 16 | 1,893,238 |
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
SMWB insider transactions (Form 4)
4714 Form 4 filings on record, the earliest from May 19, 2026, newest first.
| Date | Insider | Transaction | Security | Shares | Price | Value |
|---|---|---|---|---|---|---|
 Or Offer - Officer | Open-market sale | Ordinary Shares | 113,900 | $7.69 footnote F2 | $876K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 400 | $8.37 footnote F3 | $3K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary Shares | 34,500 | $8.38 footnote F2 | $289K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 28,400 | $8.54 footnote F3 | $242K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary Shares | 37,500 | $8.25 footnote F2 | $309K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 32,200 | $8.40 footnote F3 | $271K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary Shares | 45,719 | $8.40 footnote F2 | $384K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 30,400 | $8.35 footnote F3 | $254K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary Shares | 52,900 | $8.54 footnote F2 | $452K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 26,691 | $8.53 footnote F3 | $228K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary Shares | 59,200 | $8.06 footnote F2 | $477K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 59,000 | $8.05 footnote F3 | $475K | |
| ||||||
| Or Offer - Officer | Open-market sale | Ordinary shares | 60,700 | $8.33 footnote F2 | $506K | |
| Or Offer - Officer | Open-market sale | Ordinary shares | 86,300 | $8.06 footnote F3 | $695K | |
| ||||||
| Or Offer - Officer | Option exercise | Ordinary shares | 164,817 footnote F2 | $2.71 | $447K | |
| Or Offer - Officer | Open-market sale | Ordinary shares | 164,817 | $9.00 footnote F3 | $1.48M | |
| Or Offer - Officer | Option exercise | Ordinary shares | 39,302 footnote F2 | $2.71 | $107K | |
| Or Offer - Officer | Open-market sale | Ordinary shares | 39,302 | $9.01 footnote F4 | $354K | |
| Or Offer - Officer | Option exercise | Ordinary shares | 39,000 footnote F2 | $0.40 | $16K | |
| Or Offer - Officer | Open-market sale | Ordinary shares | 39,000 | $9.00 footnote F5 | $351K | |
| Or Offer - Officer | Option exercise | Ordinary shares | 140,008 footnote F2 | $3.04 | $426K | |
| Or Offer - Officer | Open-market sale | Ordinary shares | 140,008 | $9.01 footnote F6 | $1.26M | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 164,817 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 39,302 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 39,000 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 140,008 | $0.00 | - | |
| ||||||
| Or Offer - Officer | Option exercise | Ordinary Shares | 228,500 footnote F6 | $3.04 | $695K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 228,500 | $8.82 footnote F1 | $2.02M | |
| Or Offer - Officer | Option exercise | Ordinary Shares | 200,000 footnote F6 | $0.40 | $80K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 200,000 | $8.79 footnote F2 | $1.76M | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 106,105 | $8.75 | $928K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 40,000 | $8.90 | $356K | |
| Or Offer - Officer | Option exercise | Ordinary Shares | 59,992 footnote F6 | $3.04 | $182K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 59,992 | $8.90 footnote F3 | $534K | |
| Or Offer - Officer | Option exercise | Ordinary Shares | 75,000 footnote F6 | $0.40 | $30K | |
| Or Offer - Officer | Open-market sale | Ordinary Shares | 75,000 | $8.85 footnote F4 | $664K | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 228,500 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 200,000 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 59,992 | $0.00 | - | |
| Or Offer - Officer | Option exercise | Options to purchase one Ordinary Share | 75,000 | $0.00 | - | |
| ||||||
| Or Offer - Officer | Open-market purchase | Ordinary Shares | 50,000 | $4.15 | $208K | |
 Barak Eilam - Director | Open-market purchase | Ordinary Shares | 50,000 | $3.86 footnote F1 | $193K | |
| ||||||
| Harel Moshe Beit-On - Director | Open-market purchase | Ordinary Shares | 75,000 | $3.89 footnote F1 | $292K | |
| ||||||
| Or Offer - Officer | Open-market purchase | Ordinary Shares | 3,105 | $3.20 | $10K | |
| Or Offer - Officer | Open-market purchase | Ordinary Shares | 3,000 | $3.55 | $11K | |
| Or Offer - Officer | Open-market purchase | Ordinary Shares | 50,000 | $3.58 footnote F1 | $179K | |
| ||||||
| Tamar Rapaport-Dagim - Director | Open-market purchase | Ordinary Shares | 40,000 | $3.22 footnote F1 | $129K | |
| ||||||
Recent SMWB Form 144 notices of proposed sale
3An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
| Filed | Filer | Relationship | Shares | Market value | Notice |
|---|---|---|---|---|---|
| Or Offer | Officer | 1,000,000 | $8.84M | View on EDGAR | |
| Or Offer | Officer | 383,127 | $3.42M |
SMWB insider trading FAQ
What is the latest insider trade for SMWB?
SIMILARWEB LTD. (SMWB) had 9 insider filings in the last 90 days, with the most recent on 2026-09-25. The full record for SMWB runs to 14 Form 4 filings, the earliest from 2026-05-19. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying SMWB stock?
No insider purchases of SMWB were filed in the last 90 days. 7 purchases are on record for this company.
How many insiders are selling SMWB stock?
24 insider sales of SMWB were filed in the last 90 days, totaling $15.17M.
Where can I see SMWB SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects SMWB Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
More Information Technology companies with insider activity
Recent insider filings
10The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
- - Or Offer view on EDGAR
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Learn more
- Insider selling: signal or noise?
- Why most insider sales are routine, and the few patterns worth a second look.
- Form 144 vs Form 4
- A Form 144 announces a planned sale; the Form 4 reports it after it happens.
- Insider activity in Information Technology
- Where SMWB's peers are being bought and sold.
- Every recent Form 4
- The market-wide feed, updated as filings arrive from SEC EDGAR.
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