SimilarWeb Ltd
Ownership
Ownership Structure
Who owns SimilarWeb Ltd (SMWB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 48.0% of the shares are freely tradable; institutional investors hold 58.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Naspers Ltd | 12.66 | 11,173,265 | +0.0 | 06/30/2026 |
| MENORA MIVTACHIM HOLDINGS LIMITED | 4.55 | 4,015,494 | +0.0 | 03/31/2026 |
| Wellington Management Company LLP | 4.11 | 3,624,685 | +22.2 | 06/30/2026 |
| ION Crossover Partners Ltd | 3.43 | 3,030,826 | +0.0 | 06/30/2026 |
| Ulysses Management LLC | 3.40 | 2,998,474 | +0.0 | 03/31/2026 |
| S Squared Technology, LLC | 1.92 | 1,690,000 | +5.6 | 06/30/2026 |
| Y.D. More Investments Ltd | 1.30 | 1,151,298 | -1.7 | 03/31/2026 |
| Renaissance Technologies Corp | 0.84 | 739,673 | +104.6 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard International Explorer Inv | 1.25 | 1,106,629 | +20.9 | 06/30/2026 |
| Heptagon Driehaus US Micro Cap Eq C$ Acc | 1.02 | 901,848 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Offer Or | Chief Executive Officer | 3,930,481 | 29,871,656 $ | Sep 24, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 24, 2026 | Offer Or | Chief Executive Officer | Sell | 400 | 8.37 | 3,348 |
| Sep 24, 2026 | Offer Or | Chief Executive Officer | Sell | 113,900 | 7.69 | 875,754 |
| Sep 23, 2026 | Offer Or | Chief Executive Officer | Sell | 28,400 | 8.54 | 242,403 |
| Sep 22, 2026 | Offer Or | Chief Executive Officer | Sell | 34,500 | 8.38 | 289,034 |
| Sep 21, 2026 | Offer Or | Chief Executive Officer | Sell | 32,200 | 8.40 | 270,609 |
| Sep 18, 2026 | Offer Or | Chief Executive Officer | Sell | 37,500 | 8.25 | 309,285 |
| Sep 17, 2026 | Offer Or | Chief Executive Officer | Sell | 30,400 | 8.35 | 253,718 |
| Sep 16, 2026 | Offer Or | Chief Executive Officer | Sell | 45,719 | 8.40 | 383,930 |
| Sep 15, 2026 | Offer Or | Chief Executive Officer | Sell | 26,691 | 8.53 | 227,586 |
| Sep 14, 2026 | Offer Or | Chief Executive Officer | Sell | 52,900 | 8.54 | 451,650 |
| Sep 11, 2026 | Offer Or | Chief Executive Officer | Sell | 59,000 | 8.05 | 474,909 |
| Sep 10, 2026 | Offer Or | Chief Executive Officer | Sell | 59,200 | 8.06 | 477,336 |
| Sep 9, 2026 | Offer Or | Chief Executive Officer | Sell | 86,300 | 8.06 | 695,302 |
| Sep 8, 2026 | Offer Or | Chief Executive Officer | Sell | 60,700 | 8.33 | 505,601 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Sell | 140,008 | 9.01 | 1,260,828 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Other | 140,008 | 3.04 | 425,624 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Sell | 39,000 | 9.00 | 351,168 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Other | 39,000 | 0.40 | 15,600 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Sell | 39,302 | 9.01 | 354,194 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Other | 39,302 | 2.71 | 106,508 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Sell | 164,817 | 9.00 | 1,483,452 |
| Aug 26, 2026 | Offer Or | Chief Executive Officer | Other | 164,817 | 2.71 | 446,654 |
| Aug 14, 2026 | Offer Or | Chief Executive Officer | Sell | 75,000 | 8.85 | 663,900 |
| Aug 14, 2026 | Offer Or | Chief Executive Officer | Other | 75,000 | 0.40 | 30,000 |
| Aug 14, 2026 | Offer Or | Chief Executive Officer | Sell | 59,992 | 8.90 | 533,965 |
| Aug 14, 2026 | Offer Or | Chief Executive Officer | Other | 59,992 | 3.04 | 182,376 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Sell | 40,000 | 8.90 | 356,000 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Sell | 106,105 | 8.75 | 928,419 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Sell | 200,000 | 8.79 | 1,757,280 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Other | 200,000 | 0.40 | 80,000 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Sell | 228,500 | 8.82 | 2,015,713 |
| Aug 13, 2026 | Offer Or | Chief Executive Officer | Other | 228,500 | 3.04 | 694,640 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: September 25, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.