StockCIK 1842731
SIMILARWEB LTD. (SMWB): Insider Trades and Fund Holdings
In the past 12 months, SIMILARWEB LTD. insiders reported 0 open-market purchases worth $0 and 18 sales worth $15.8M; 15 of the sales were reported as made under a 10b5-1 trading plan.
0Insider buys, 12 months
$0Bought by insiders, 12 months
$15.8MSold by insiders, 12 months
1Tracked funds holding
Recent insider trades
Open-market purchases (code P) and sales (code S) from Form 4. Grants, option exercises and gifts are not shown. Latest filing: Sep 25, 2026.
| Filed | Insider | Type | Value |
|---|---|---|---|
| Sep 25 | Or OfferCEO | ▼ SELL10b5-1 | $879K |
| Sep 24 | Or OfferCEO | ▼ SELL10b5-1 | $289K |
| Sep 24 | Or OfferCEO | ▼ SELL10b5-1 | $242K |
| Sep 22 | Or OfferCEO | ▼ SELL10b5-1 | $309K |
| Sep 22 | Or OfferCEO | ▼ SELL10b5-1 | $271K |
| Sep 18 | Or OfferCEO | ▼ SELL10b5-1 | $384K |
| Sep 18 | Or OfferCEO | ▼ SELL10b5-1 | $254K |
| Sep 16 | Or OfferCEO | ▼ SELL10b5-1 | $452K |
| Sep 16 | Or OfferCEO | ▼ SELL10b5-1 | $452K |
| Sep 16 | Or OfferCEO | ▼ SELL10b5-1 | $228K |
Source: SEC Form 4 filings, retrieved Oct 28, 2026. How we read filings
All 18 SMWB insider trades →Insiders who traded in the past year
| Insider | Role | Buys | Bought | Sells | Sold |
|---|---|---|---|---|---|
| Or Offer | CEO | 0 | $0 | 18 | $15.8M |
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Tracked funds that report SMWB
From each fund's latest 13F. Holdings are as of quarter end and are filed up to 45 days later.
| Fund | Shares | Value | Change |
|---|---|---|---|
| Renaissance Technologies | 713,728 | $4.38M | ▼ −3.5% |
Source: SEC Form 13F-HR filings, retrieved Oct 28, 2026. How we read filings
Reading these numbers
Insiders sell for many reasons: taxes, diversification, a house. Purchases with their own money are rarer and are usually read as more informative. A Form 4 is due within two business days of the trade. How to read a Form 4 →