Similarweb Ltd. (SMWB) Insider Trading
Over the last 3 months, SMWB insiders made 1 open-market buy and 10 sales, a net sale of -$9.5M (SEC Form 4). Over the last 6 months, 32 institutions increased and 20 reduced their position (13F).
Insider Activity
Sentiment
2/100
Buys (3m)
1
Sells (3m)
10
Net (3m)
-$9.5M
Insiders buying
Insider trades by month Buys Sells
May
Jun
Aug
Context3-month price +120.6%Institutions reducing (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Option | 39,000 | $0.40 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 39,302 | $9.01 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 164,817 | $9.00 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Option | 39,302 | $2.71 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 140,008 | $9.01 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Option | 140,008 | $3.04 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 39,000 | $9.00 |
| Aug 27, 2026 | Offer Orofficer: Chief Executive Officer | Option | 164,817 | $2.71 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Option | 75,000 | $0.40 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 75,000 | $8.85 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 40,000 | $8.90 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Option | 228,500 | $3.04 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 228,500 | $8.82 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Option | 200,000 | $0.40 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 200,000 | $8.79 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 106,105 | $8.75 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Option | 59,992 | $3.04 |
| Aug 17, 2026 | Offer Orofficer: Chief Executive Officer | Sell | 59,992 | $8.90 |
| Jun 2, 2026 | Offer Ordirector, officer: Chief Executive Officer | Buy | 50,000 | $4.15 |
| May 22, 2026 | Eilam Barakdirector | Buy | 50,000 | $3.86 |
| May 21, 2026 | Beit-On Harel Moshedirector | Buy | 75,000 | $3.89 |
| May 20, 2026 | Offer Ordirector, officer: Chief Executive Officer | Buy | 3,000 | $3.55 |
| May 20, 2026 | Offer Ordirector, officer: Chief Executive Officer | Buy | 50,000 | $3.58 |
| May 20, 2026 | Offer Ordirector, officer: Chief Executive Officer | Buy | 3,105 | $3.20 |
| May 19, 2026 | Rapaport-Dagim Tamardirector | Buy | 40,000 | $3.22 |
Source: SMWB SEC Form 4 filings, latest Aug 27, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their SMWB positions over the last 6 months (SEC Form 13F).
Increased
32
New positions
19
Reduced
20
Sold out
80
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| NASPERS LTD | Unchanged | 11.2M | May 13, 2026 |
| MENORA MIVTACHIM HOLDINGS LTD. | Unchanged | 4.0M | May 14, 2026 |
| ION CROSSOVER PARTNERS LTD | Unchanged | 3.0M | May 20, 2026 |
| ULYSSES MANAGEMENT LLC | Unchanged | 3.0M | May 15, 2026 |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 3.0M | May 15, 2026 |
| S SQUARED TECHNOLOGY, LLC | Increased | 1.6M | May 15, 2026 |
| CENTERBOOK PARTNERS LP | Increased | 1.3M | May 5, 2026 |
| Y.D. MORE INVESTMENTS LTD | Reduced | 1.2M | May 4, 2026 |
| MILLENNIUM MANAGEMENT LLC | Increased | 826K | May 15, 2026 |
| MIRABELLA FINANCIAL SERVICES LLP | New Position | 793K | May 12, 2026 |
| RENAISSANCE TECHNOLOGIES LLC | Increased | 740K | May 14, 2026 |
| ALPHA FAMILY TRUST | Unchanged | 659K | May 13, 2026 |
| HERALD INVESTMENT MANAGEMENT LTD | Unchanged | 645K | May 13, 2026 |
| CDC Financial, Inc. | Increased | 639K | May 15, 2026 |
| MARSHALL WACE, LLP | Increased | 638K | May 15, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.