Similarweb Ltd.
DE ˙ DB ˙ IL0011751653
3,67 € ↓ -0,22 (-5,56%)
2026-06-03
AKTIENPREIS
SecurityDE:63X / Similarweb Ltd.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership825,763 shares
Latest Disclosed Value $ 2,155,241
Millennium Management Llc ownership in 63X / Similarweb Ltd.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 825,763 shares of Similarweb Ltd. (DE:63X) valued at $1,791,906 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 357,807 shares of Similarweb Ltd.. This represents a change in shares of 130.78% during the quarter. The current value of the position is $3,028,899 USD.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (63X) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

DE:63X / Similarweb Ltd. Historical Put/Call Ratio
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 825,763 467,956 130.78 2,155 -19.56 0.0009
2026-02-17 2025-12-31 13F SIMILARWEB SHS M84137104 357,807 -153,114 -29.97 2,680 -43.61 0.0011
2025-11-14 2025-09-30 13F SIMILARWEB SHS M84137104 510,921 202,537 65.68 4,752 96.57 0.0020
2025-08-14 2025-06-30 13F SIMILARWEB SHS M84137104 308,384 282,930 1,111.53 2,418 1,050.95 0.0012
2025-05-15 2025-03-31 13F SIMILARWEB SHS M84137104 25,454 -82,874 -76.50 211 -86.32 0.0001
2025-02-14 2024-12-31 13F SIMILARWEB SHS M84137104 108,328 -433,954 -80.02 1,535 -67.97 0.0008
2024-11-14 2024-09-30 13F SIMILARWEB SHS M84137104 542,282 280,774 107.37 4,794 135.99 0.0023
2024-08-14 2024-06-30 13F SIMILARWEB SHS M84137104 261,508 28,264 12.12 2,032 -3.24 0.0009
2024-05-15 2024-03-31 13F SIMILARWEB SHS M84137104 233,244 99,154 73.95 2,099 193.98 0.0009
2024-02-14 2023-12-31 13F SIMILARWEB SHS M84137104 134,090 108,248 418.88 715 327.54 0.0003
2023-11-14 2023-09-30 13F SIMILARWEB SHS M84137104 25,842 -41,597 -61.68 167 -62.22 0.0001
2023-08-14 2023-06-30 13F SIMILARWEB SHS M84137104 67,439 27,651 69.50 442 64.31 0.0002
2023-05-15 2023-03-31 13F SIMILARWEB SHS M84137104 39,788 39,788 269 0.0002
2023-02-14 2022-12-31 13F SIMILARWEB SHS M84137104 0 -398,109 -100.00 0 -100.00
2022-11-14 2022-09-30 13F SIMILARWEB SHS M84137104 398,109 -466,080 -53.93 2,333 -67.28 0.0014
2022-08-15 2022-06-30 13F SIMILARWEB SHS M84137104 864,189 -73,232 -7.81 7,130 -41.27 0.0044
2022-05-16 2022-03-31 13F SIMILARWEB SHS M84137104 937,421 324,290 52.89 12,140 10.55 0.0064
2022-02-14 2021-12-31 13F SIMILARWEB SHS M84137104 613,131 237,781 63.35 10,981 39.78 0.0056
2021-11-15 2021-09-30 13F SIMILARWEB SHS M84137104 375,350 -42,426 -10.16 7,856 -4.54 0.0047
2021-08-16 2021-06-30 13F SIMILARWEB SHS M84137104 417,776 417,776 8,230 0.0050
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-08-14 2024-06-30 13F SIMILARWEB SHS Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-05-15 2024-03-31 13F SIMILARWEB SHS Call 100,000 900 n/a n/a n/a
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.