Similarweb Ltd.
DE ˙ DB ˙ IL0011751653
3,88 € ↑0,29 (8,07%)
2026-06-02
DEL PRIS
SecurityDE:63X / Similarweb Ltd.
InstitutionXTX Topco Ltd
Latest Disclosed Ownership228,880 shares
Latest Disclosed Value $ 597,377
XTX Topco Ltd ownership in 63X / Similarweb Ltd.

On May 15, 2026 - XTX Topco Ltd filed a 13F-HR form disclosing ownership of 228,880 shares of Similarweb Ltd. (DE:63X) valued at $496,670 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 8, 2025 disclosing 0 shares of Similarweb Ltd.. The current value of the position is $888,970 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SIMILARWEB SHS M84137104 228,880 228,880 597 0.0104
2025-05-08 2025-03-31 13F SIMILARWEB SHS M84137104 0 -52,175 -100.00 0 -100.00
2025-02-13 2024-12-31 13F SIMILARWEB SHS M84137104 52,175 -1,805 -3.34 739 54.93 0.0608
2024-11-14 2024-09-30 13F SIMILARWEB SHS M84137104 53,980 4,453 8.99 477 24.22 0.0345
2024-08-12 2024-06-30 13F SIMILARWEB SHS M84137104 49,527 19,313 63.92 385 41.70 0.0329
2024-05-13 2024-03-31 13F SIMILARWEB SHS M84137104 30,214 30,214 272 0.0367
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.