NYSE · CIK 0001842731
SMWB SIMILARWEB LTD.
Insider trading from SEC Form 4. Last filing 18 d ago. Close $9.05 on Oct 9, 2026, +288% from the 52-week low and -3% from the high.
SIMILARWEB LTD. (SMWB) has 11 SEC Form 4 filings on file from 3 insiders, the latest filed on Sep 25, 2026. In the last 90 days insiders made 0 open-market buys worth $0 and 9 open-market sells worth $6.8M, net -$6.8M.
11 open-market trades have been scored at SMWB. The newest: Or Offer (Chief Executive Officer) sold $879k of stock on Sep 24, 2026, filed Sep 25, 2026, scored 28 (weak), under a 10b5-1 plan. The largest of the 11 shown: Or Offer (Chief Executive Officer) sold $1.2M on Sep 8, 2026, scored 30 (weak), under a 10b5-1 plan. 2 insiders bought within 14 days of each other around May 21, 2026.
SMWB closed at $9.05 on Oct 9, 2026, 288% above its 52-week low and 3% below its 52-week high.
25 Form 144 notices of planned sales are on file, the latest filed Sep 9, 2025.
Last 90 days
Price and insider trades, last year
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
Open-market buys and sells at SIMILARWEB LTD., scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 28Weak | Or Offer Chief Executive Officer sell | $879k 114,300 shares | -3% | - | |
| 23Weak | Or Offer Chief Executive Officer sell | $531k 62,900 shares | -2% | - | |
| 24Weak | Or Offer Chief Executive Officer sell | $580k 69,700 shares | -2% | - | |
| 25Weak | Or Offer Chief Executive Officer sell | $638k 76,119 shares | -2% | - | |
| 26Weak | Or Offer Chief Executive Officer sell | $679k 79,591 shares | -2% | - | |
| 26Weak | Or Offer Chief Executive Officer sell | $679k 79,591 shares | -2% | - | |
| 26Weak | Or Offer Chief Executive Officer sell | $679k 79,591 shares | -2% | - | |
| 29Weak | Or Offer Chief Executive Officer sell | $952k 118,200 shares | -3% | - | |
| 30Weak | Or Offer Chief Executive Officer sell | $1.2M 147,000 shares | -3% | - | |
| 53Moderate | Barak Eilam director buy | $193k 50,000 shares | +97% | +62% from low-64% from high | |
| 40Moderate | Harel Moshe Beit-On director buy | $292k 75,000 shares | +1% | +64% from low-63% from high |
Planned sales
Form 144 notices filed before a sale of restricted or control stock, newest first. The sale itself usually reaches a Form 4 within days. All planned sales
| Filed | Seller | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Sep 9, 2025 | Offer Or Officer | 100,000 0.12% of outstanding | $972k | Sep 8, 2025 | none |
| Jan 22, 2025 | Offer Or Officer | 62,500 0.08% of outstanding | $978k | Jan 21, 2025 | $11M |
| Jan 15, 2025 | Seror Benjamin Officer | 50,000 0.06% of outstanding | $706k | Jan 14, 2025 | $1.9M |
| Jan 10, 2025 | Seror Benjamin Officer | 50,000 0.06% of outstanding | $745k | Jan 8, 2025 | $1.1M |
| Dec 20, 2024 | Offer Or Officer | 66,667 0.09% of outstanding | $938k | Dec 20, 2024 | $8.9M |
| Dec 19, 2024 | Offer Or Officer | 170,648 0.23% of outstanding | $2.3M | Dec 18, 2024 | $6.6M |
| Dec 18, 2024 | VIOLA PARTNERS FUND 4 2013 LP Affiliate | 205 0.00% of outstanding | $2,769 | Dec 17, 2024 | $5.7M |
| Dec 18, 2024 | VG SW, L.P, Affiliate | 6,711 0.01% of outstanding | $91k | Dec 18, 2024 | $5.7M |
| Dec 18, 2024 | VIOLA GROWTH II (B) L.P. Affiliate | 3,395 0.00% of outstanding | $46k | Dec 17, 2024 | $5.7M |
| Dec 18, 2024 | VIOLA GROWTH II (A) L.P. Affiliate | 2,567 0.00% of outstanding | $35k | Dec 17, 2024 | $5.3M |
| Dec 17, 2024 | Offer Or Officer | 120,000 0.16% of outstanding | $1.5M | Dec 16, 2024 | $4.9M |
| Dec 11, 2024 | VIOLA PARTNERS FUND 4 2013 LP Affiliate | 1,589 0.00% of outstanding | $21k | Dec 11, 2024 | $4.4M |
| Dec 11, 2024 | VIOLA GROWTH II (B) L.P. Affiliate | 26,361 0.03% of outstanding | $345k | Dec 11, 2024 | $4.4M |
| Dec 11, 2024 | VIOLA GROWTH II (A) L.P. Affiliate | 19,935 0.02% of outstanding | $261k | Dec 11, 2024 | $4.2M |
| Dec 11, 2024 | VG SW, L.P, Affiliate | 52,115 0.06% of outstanding | $682k | Dec 11, 2024 | $4.7M |
| Dec 6, 2024 | Offer Or Officer | 150,000 0.20% of outstanding | $2.0M | Dec 5, 2024 | $2.9M |
| Dec 5, 2024 | Offer Or Officer | 74,845,441 100.00% of outstanding | $373k | Dec 4, 2024 | $1.9M |
| Dec 5, 2024 | VG SW GP, Limited Partnership Affiliate | 7,875 0.01% of outstanding | $98k | Dec 4, 2024 | $1.9M |
| Dec 4, 2024 | Offer Or Officer | 10,000 0.01% of outstanding | $123k | Dec 3, 2024 | $1.8M |
| Dec 4, 2024 | VIOLA GROWTH II (B) L.P. Affiliate | 38,223 0.05% of outstanding | $493k | Dec 4, 2024 | $2.0M |
| Dec 4, 2024 | VG SW, L.P, Affiliate | 75,568 0.09% of outstanding | $974k | Dec 4, 2024 | $2.0M |
| Dec 4, 2024 | VIOLA PARTNERS FUND 4 2013 LP Affiliate | 2,303 0.00% of outstanding | $30k | Dec 4, 2024 | $2.0M |
| Dec 4, 2024 | VIOLA GROWTH II (A) L.P. Affiliate | 28,906 0.04% of outstanding | $373k | Dec 4, 2024 | $2.0M |
| Dec 2, 2024 | Offer Or Officer | 10,000 0.01% of outstanding | $126k | Nov 29, 2024 | $1.7M |
| Nov 29, 2024 | VIOLA PARTNERS FUND 4 2013 LP Affiliate | 76 0.00% of outstanding | $953 | Nov 29, 2024 | $2.0M |
Transactions
Every row filed, 20 in all.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Sep 24, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -113,900 | $7.69 | $876k | 3,930,881 | 18 d ago |
| Sep 24, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -400 | $8.37 | $3,348 | 3,930,481 | 18 d ago |
| Sep 22, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -34,500 | $8.38 | $289k | 4,073,181 | 19 d ago |
| Sep 23, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -28,400 | $8.54 | $242k | 4,044,781 | 19 d ago |
| Sep 18, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -37,500 | $8.25 | $309k | 4,139,881 | 21 d ago |
| Sep 21, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -32,200 | $8.40 | $271k | 4,107,681 | 21 d ago |
| Sep 16, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -45,719 | $8.40 | $384k | 4,207,781 | 25 d ago |
| Sep 17, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -30,400 | $8.35 | $254k | 4,177,381 | 25 d ago |
| Sep 14, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -52,900 | $8.54 | $452k | 4,280,191 | 27 d ago |
| Sep 14, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -52,900 | $8.54 | $452k | 4,280,191 | 27 d ago |
| Sep 14, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -52,900 | $8.54 | $452k | 4,280,191 | 27 d ago |
| Sep 15, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -26,691 | $8.53 | $228k | 4,253,500 | 27 d ago |
| Sep 15, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -26,691 | $8.53 | $228k | 4,253,500 | 27 d ago |
| Sep 15, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -26,691 | $8.53 | $228k | 4,253,500 | 27 d ago |
| Sep 10, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -59,200 | $8.06 | $477k | 4,392,091 | 29 d ago |
| Sep 11, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary Shares10b5-1 | -59,000 | $8.05 | $475k | 4,333,091 | 29 d ago |
| Sep 8, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary shares10b5-1 | -60,700 | $8.33 | $506k | 4,537,591 | 33 d ago |
| Sep 9, 2026 | Or Offer Chief Executive Officer | SOpen-market sale Ordinary shares10b5-1 | -86,300 | $8.06 | $695k | 4,451,291 | 33 d ago |
| May 21, 2026 | Barak Eilam director | POpen-market purchase Ordinary Shares | +50,000 | $3.86 | $193k | 101,315 | May 22, 2026 |
| May 20, 2026 | Harel Moshe Beit-On director | POpen-market purchase Ordinary Shares | +75,000 | $3.89 | $292k | 10,885,778 | May 21, 2026 |
Insiders
Everyone who has filed a Form 4 here.
- Harel Moshe Beit-Ondirector
- Barak Eilamdirector
- Or OfferChief Executive Officer
Questions about SMWB
Answered from the filings on this page, as of the latest one.
Are insiders buying SMWB?
As of Sep 25, 2026, SEC Form 4 filings show 0 open-market buys worth $0 by 0 insiders and 9 open-market sells worth $6.8M by 1 insider at SIMILARWEB LTD. in the last 90 days, net -$6.8M. Only purchases (code P) and sales (code S) count; grants, option exercises and tax withholding do not.
Who was the last insider to trade SMWB on the open market?
Or Offer (Chief Executive Officer) sold $879k of SMWB on Sep 24, 2026 and filed the Form 4 on Sep 25, 2026. InsiderTell scored 28 (weak), under a 10b5-1 plan.
How many insiders file Form 4 at SIMILARWEB LTD.?
3 people have filed a Form 4 at SIMILARWEB LTD., among them Harel Moshe Beit-On (director), Barak Eilam (director), Or Offer (Chief Executive Officer). Officers, directors and holders of more than 10% of a share class must report their trades within two business days.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.