Similarweb Ltd.
DE ˙ DB ˙ IL0011751653
3,67 € ↓ -0,22 (-5,56%)
2026-06-03
AKTIENPREIS
SecurityDE:63X / Similarweb Ltd.
InstitutionMorgan Stanley
Latest Disclosed Ownership591,863 shares
Latest Disclosed Value $ 1,544,762
Morgan Stanley reports 130.60% increase in ownership of 63X / Similarweb Ltd.

On May 15, 2026 - Morgan Stanley filed a 13F-HR form disclosing ownership of 591,863 shares of Similarweb Ltd. (DE:63X) valued at $1,284,343 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on May 27, 2026 disclosing 256,660 shares of Similarweb Ltd.. This represents a change in shares of 130.60% during the quarter. The current value of the position is $2,170,953 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)
2026-05-15 2026-03-31 13F SIMILARWEB SHS M84137104 591,863 335,203 130.60 1,545 -19.67 0.0001
2026-05-27 2025-12-31 13F/A-1 SIMILARWEB SHS M84137104 256,660 -42,868 -14.31 1,922 -30.99 0.0001
2026-02-13 2025-12-31 13F SIMILARWEB SHS M84137104 256,660 -42,868 1,922 0.0001
2026-05-27 2025-09-30 13F/A-1 SIMILARWEB SHS M84137104 299,528 -613,733 -67.20 2,786 -61.10 0.0002
2025-11-14 2025-09-30 13F SIMILARWEB SHS M84137104 299,528 -613,733 2,786 0.0002
2025-08-15 2025-06-30 13F SIMILARWEB SHS M84137104 913,261 572,884 168.31 7,160 154.41 0.0005
2025-05-15 2025-03-31 13F SIMILARWEB SHS M84137104 340,377 21,358 6.69 2,815 -37.74 0.0002
2025-05-15 2024-12-31 13F/A-1 SIMILARWEB SHS M84137104 319,019 143,064 81.31 4,520 190.68 0.0003
2025-02-14 2024-12-31 13F SIMILARWEB SHS M84137104 319,019 143,064 4,520 0.0003
2025-05-14 2024-09-30 13F/A-2 SIMILARWEB SHS M84137104 175,955 53,443 43.62 1,555 63.51 0.0001
2025-02-14 2024-09-30 13F/A-1 SIMILARWEB SHS M84137104 175,955 53,443 1,555 0.0001
2024-11-14 2024-09-30 13F SIMILARWEB SHS M84137104 175,955 53,443 1,555 0.0001
2025-05-14 2024-06-30 13F/A-2 SIMILARWEB SHS M84137104 122,512 34,179 38.69 952 19.77 0.0001
2024-10-17 2024-06-30 13F/A-1 SIMILARWEB SHS M84137104 122,512 34,179 952 0.0001
2024-08-14 2024-06-30 13F SIMILARWEB SHS M84137104 122,512 34,179 952 0.0001
2024-10-17 2024-03-31 13F/A-2 SIMILARWEB SHS M84137104 88,333 -2,206 -2.44 795 64.73 0.0001
2024-08-16 2024-03-31 13F/A-1 SIMILARWEB SHS M84137104 88,333 -2,206 795 0.0000
2024-05-15 2024-03-31 13F SIMILARWEB SHS M84137104 88,333 -2,206 795 0.0001
2024-08-16 2023-12-31 13F/A-1 SIMILARWEB SHS M84137104 90,539 4,738 5.52 483 -13.15 0.0000
2024-02-13 2023-12-31 13F SIMILARWEB SHS M84137104 90,539 4,738 483 0.0000
2023-11-15 2023-09-30 13F SIMILARWEB SHS M84137104 85,801 3,333 4.04 556 2.78 0.0001
2023-08-14 2023-06-30 13F SIMILARWEB SHS M84137104 82,468 14,086 20.60 541 16.88 0.0001
2023-05-15 2023-03-31 13F SIMILARWEB SHS M84137104 68,382 53,064 346.42 462 371.43 0.0000
2023-02-14 2022-12-31 13F SIMILARWEB SHS M84137104 15,318 2,110 15.98 98 27.27 0.0000
2022-11-14 2022-09-30 13F SIMILARWEB SHS M84137104 13,208 3,433 35.12 77 -4.94 0.0000
2022-10-27 2022-06-30 13F/A-1 SIMILARWEB SHS M84137104 9,775 -5,222 -34.82 81 -58.25 0.0000
2022-08-15 2022-06-30 13F SIMILARWEB SHS M84137104 9,775 -5,222 81 0.0000
2022-10-27 2022-03-31 13F/A-1 SIMILARWEB SHS M84137104 14,997 3,797 33.90 194 -3.48 0.0000
2022-05-13 2022-03-31 13F SIMILARWEB SHS M84137104 14,997 3,797 194 0.0000
2022-02-14 2021-12-31 13F SIMILARWEB SHS M84137104 11,200 600 5.66 201 -9.46 0.0000
2021-11-15 2021-09-30 13F SIMILARWEB SHS M84137104 10,600 1,700 19.10 222 26.86 0.0000
2021-08-23 2021-06-30 13F/A-1 SIMILARWEB SHS M84137104 8,900 8,900 175 0.0000
2021-08-16 2021-06-30 13F SIMILARWEB SHS M84137104 8,900 8,900 175 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.