SMWB — SIMILARWEB LTD
Public company
InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.
Sourced from SEC EDGAR public filings
Why are billionaires buying SMWB?
Built from public SEC filings and public economic data. Not a recommendation.
Why? — Evidence & Confidence ▾
Of 1 tracked investors who changed their SMWB position last quarter, 1 bought and 0 sold (100% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 56/100 in a Overheat regime).
- +1 tracked investor added or increased positions last quarter (Cathie Wood)
- +3 tracked investors reported holding SMWB at their latest filing
- +Macro Health is 56/100 in a Overheat regime — historically acceptable for this sectorsource
- −13F data is disclosed up to 45 days after quarter end — positions may have changed since
- · 13F disclosure lag (up to 45 days)
- · Tracked investors are a sample, not the whole market
- · Sector regime fit is a historical average, not a guarantee
Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 9/18/2026.
About SIMILARWEB LTD (SMWB)
SIMILARWEB LTD (SMWB) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $15M. Across recent filings, tracked investors recorded 3 new positions, 6 increased, 4 reduced, and 1 exited. All data sourced from SEC 13F filings.
Based on recent institutional activity in SMWB
How many top investors track SMWB
A small number of top investors own this.
SMWB Ownership Composition
How SIMILARWEB LTD is held across tracked investor types, based on reported 13F positions.
- Growth & Innovation66.6%
- Multi-Strategy / Quant33.4%
Tracked investors currently reporting SMWB
1 tracked investor has since exited this position — listed separately below.
- Ken GriffinJun 30, 2026Citadel AdvisorsShares399.9KValue$2.5M% Portfolio0.00%
- Cathie WoodJun 30, 2026ARK Investment ManagementShares834.7KValue$5.1M% Portfolio0.03%
- Izzy EnglanderJun 30, 2026Millennium ManagementShares18.2KValue$111.6K% Portfolio0.00%
Previously held SMWB
These investors reported SMWB in an earlier quarter but not in their most recent 13F. Figures below are their last reported position, not a current holding.
| Investor | Firm | Last reported shares | Value then | Last held |
|---|---|---|---|---|
| Steve Cohen | Point72 Asset Management | 100.2K | $261.5K | Mar 31, 2026 |
Recent activity
- Increased$1.8M(9.85%)Jan 17, 2024
- Increased$3.5M(12.76%)Apr 18, 2024
- Reduced$2.2M(-25.15%)Jul 26, 2024
- Reduced$2.4M(-3.99%)Oct 31, 2024
- Reduced$2.9M(-26.23%)Feb 4, 2025
- Reduced$998.6K(-40.71%)May 7, 2025
- Increased$1.9M(100.72%)Jul 30, 2025
- Increased$1.8M(2.77%)Feb 11, 2026
- Increased$918.9K(48.91%)May 12, 2026
- Increased$5.1M(137.07%)Aug 14, 2026
- Sold$0(-100.00%)Nov 14, 2024
- New$3.6MFeb 17, 2026
- New$2MOct 18, 2023
- New$853.2KAug 14, 2024
Frequently asked questions
- How many institutional investors hold SMWB?
- 3 tracked institutional investors disclosed a position in SMWB (SIMILARWEB LTD) in their most recent 13F filing.
- Who is the largest institutional holder of SMWB?
- Ken Griffin, Citadel Advisors, holds the largest disclosed position in SMWB, valued at $15M.
- Did institutional ownership of SMWB increase or decrease?
- Across recent 13F filings, tracked investors recorded 3 new positions, 6 increased, 4 reduced, and 1 fully exited SMWB.
- Where does this SMWB ownership data come from?
- SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.