Similarweb Ltd.
DE ˙ DB ˙ IL0011751653
3,88 € ↑0,29 (8,07%)
2026-06-02
DEL PRIS
SecurityDE:63X / Similarweb Ltd.
InstitutionSimplex Trading, Llc
Latest Disclosed Ownership2,904 shares
Latest Disclosed Value $ 7,579
Simplex Trading, Llc reports 84.71% decrease in ownership of 63X / Similarweb Ltd.

On May 14, 2026 - Simplex Trading, Llc filed a 13F-HR form disclosing ownership of 2,904 shares of Similarweb Ltd. (DE:63X) valued at $6,302 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 18,997 shares of Similarweb Ltd.. This represents a change in shares of -84.71% during the quarter. The current value of the position is $11,279 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.

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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)
2026-05-14 2026-03-31 13F SIMILARWEB COM M84137104 2,904 -16,093 -84.71 8 -95.07 0.0000
2026-02-11 2025-12-31 13F SIMILARWEB COM M84137104 18,997 -66,225 -77.71 142 0.0001
2025-11-12 2025-09-30 13F SIMILARWEB COM M84137104 85,222 19,452 29.58 1 0.0004
2025-08-05 2025-06-30 13F SIMILARWEB COM M84137104 65,770 25,456 63.14 1 0.0003
2025-05-12 2025-03-31 13F SIMILARWEB COM M84137104 40,314 40,314 0 0.0002
2025-02-11 2024-12-31 13F SIMILARWEB COM M84137104 0 -1,396 -100.00 0 0.0000
2024-11-08 2024-09-30 13F SIMILARWEB COM M84137104 1,396 1,396 0 0.0000
2024-04-25 2024-03-31 13F SIMILARWEB COM M84137104 0 -440 -100.00 0 0.0000
2024-02-02 2023-12-31 13F SIMILARWEB COM M84137104 440 89 25.36 0 0.0000
2023-11-01 2023-09-30 13F SIMILARWEB COM M84137104 351 59 20.21 0 0.0000
2023-08-04 2023-06-30 13F SIMILARWEB COM M84137104 292 292 0 0.0000
2023-04-27 2023-03-31 13F SIMILARWEB COM M84137104 0 -59,827 -100.00 0 0.0000
2023-02-02 2022-12-31 13F SIMILARWEB COM M84137104 59,827 28,675 92.05 0 -100.00 0.0004
2022-11-04 2022-09-30 13F SIMILARWEB COM M84137104 31,152 31,091 50,968.85 182 0.0002
2022-08-03 2022-06-30 13F SIMILARWEB COM M84137104 61 -108 -63.91 0 -100.00
2022-05-02 2022-03-31 13F SIMILARWEB COM M84137104 169 169 2 0.0000
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.