Similarweb (SMWB) Held by Superinvestors
SIMILARWEB LTD (SMWB) is currently held by 2 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $9.49M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
ARK Invest is currently the largest disclosed institutional shareholder of SMWB tracked by InsiderSet, reporting ownership valued at approximately $5.12M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $7.34M, representing an estimated gain of +43.39% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed SMWB value among the investors covered in this analysis. Major shareholders include ARK Invest, Renaissance Technologies LLC, and several other long-term asset managers with concentrated positions in SIMILARWEB LTD (SMWB).
This page ranks the largest institutional SMWB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| ARK Invest | Cathie Wood | 0.03% | 834,663 | $5,116,484 | $7,336,688 | +$2,220,204 | +43.39% |
| Renaissance Technologies LLC | Jim Simons | 0.01% | 713,728 | $4,375,153 | $6,273,669 | +$1,898,516 | +43.39% |
Frequently asked questions about SMWB
Who are the largest superinvestors holding SMWB?
The largest superinvestors holding SMWB in the latest SEC Form 13F filings include ARK Invest and Renaissance Technologies LLC. InsiderSet ranks these superinvestors by their latest reported SMWB position.
What does the SMWB superinvestors page include?
This page tracks SMWB positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. SIMILARWEB LTD (SMWB) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold SMWB?
InsiderSet currently tracks 2 superinvestors reporting SMWB holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own SMWB.
How much SMWB stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $9.49M in SMWB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were SMWB superinvestor holdings last updated?
The latest SMWB superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor SMWB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its SMWB position after the reporting date.
Are superinvestors buying or selling SMWB?
Buying and selling can be analyzed by comparing SMWB positions across consecutive 13F reporting periods. InsiderSet's SMWB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View SMWB ownership changes.
How have superinvestor SMWB holdings changed over time?
InsiderSet tracks SMWB holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.