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Ken Griffin's Similarweb Ltd. (SMWB) position

Yes: as of Q1 2026, Ken Griffin holds 476K shares of SMWB worth an amount we cannot price (0.0% of the disclosed portfolio). Last quarter the position was increased by 137.9%. First disclosed Q2 2021.
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Current value
an amount we cannot price
Shares held
476K
% of portfolio
0.0%
Quarter-end price
No quarter-end price available

Average buy price is hidden here because at least one covered purchase quarter has no usable local mean price.

SMWB price vs Griffin's position

1Y 3Y 5Y MAX
Dates
← Earlier —9 purchases, 9 sells66.577.5
Average closing price · filing quarter
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Price range · filing quarter
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Every quarterly change

Every quarterly change
Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Added· Q1 2026 +276K
Quarter Q1 2026 Δ Own +137.9% Shares held 476K Filing date May 15, 2026
Q1 2026 Added· Q1 2026 +276K – +137.9% 476K May 15, 2026
Reduced· Q4 2025 −61K
Quarter Q4 2025 Δ Own −23.3% Shares held 200K Filing date Feb 17, 2026
Q4 2025 Reduced· Q4 2025 −61K – −23.3% 200K Feb 17, 2026
Reduced· Q3 2025 −619K
Quarter Q3 2025 Δ Own −70.4% Shares held 261K Filing date Nov 14, 2025
Q3 2025 Reduced· Q3 2025 −619K – −70.4% 261K Nov 14, 2025
Added· Q2 2025 +380K
Quarter Q2 2025 Δ Own +76.1% Shares held 880K Filing date Aug 14, 2025
Q2 2025 Added· Q2 2025 +380K – +76.1% 880K Aug 14, 2025
Added· Q1 2025 +243K
Quarter Q1 2025 Δ Own +94.5% Shares held 500K Filing date May 15, 2025
Q1 2025 Added· Q1 2025 +243K – +94.5% 500K May 15, 2025
Reduced· Q4 2024 −1.4M
Quarter Q4 2024 Δ Own −84.7% Shares held 257K Filing date Feb 14, 2025
Q4 2024 Reduced· Q4 2024 −1.4M – −84.7% 257K Feb 14, 2025
Added· Q3 2024 +1.6M
Quarter Q3 2024 Δ Own +1,437.8% Shares held 1.7M Filing date Nov 14, 2024
Q3 2024 Added· Q3 2024 +1.6M – +1,437.8% 1.7M Nov 14, 2024
Added· Q2 2024 +92K
Quarter Q2 2024 Δ Own +535.6% Shares held 109K Filing date Aug 14, 2024
Q2 2024 Added· Q2 2024 +92K – +535.6% 109K Aug 14, 2024
Reduced· Q1 2024 −76K
Quarter Q1 2024 Δ Own −81.6% Shares held 17K Filing date May 15, 2024
Q1 2024 Reduced· Q1 2024 −76K – −81.6% 17K May 15, 2024
New· Q4 2023 +93K
Quarter Q4 2023 Shares held 93K Filing date Feb 14, 2024
Q4 2023 New· Q4 2023 +93K – – 93K Feb 14, 2024
Reduced· Q2 2023 −12K
Quarter Q2 2023 Δ Own −37.8% Shares held 20K Filing date Aug 14, 2023
Q2 2023 Reduced· Q2 2023 −12K – −37.8% 20K Aug 14, 2023
New· Q1 2023 +32K
Quarter Q1 2023 Shares held 32K Filing date May 15, 2023
Q1 2023 New· Q1 2023 +32K – – 32K May 15, 2023
Reduced· Q3 2022 −22K
Quarter Q3 2022 Δ Own −32.1% Shares held 46K Filing date Nov 14, 2022
Q3 2022 Reduced· Q3 2022 −22K – −32.1% 46K Nov 14, 2022
Reduced· Q2 2022 −50K
Quarter Q2 2022 Δ Own −42.5% Shares held 68K Filing date Aug 15, 2022
Q2 2022 Reduced· Q2 2022 −50K – −42.5% 68K Aug 15, 2022
Reduced· Q1 2022 −13K
Quarter Q1 2022 Δ Own −10.1% Shares held 118K Filing date May 16, 2022
Q1 2022 Reduced· Q1 2022 −13K – −10.1% 118K May 16, 2022
Data through Q1 2026 · filed May 15, 2026
15 of 18

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Common questions

Does Ken Griffin own SMWB?

Yes. As of Q1 2026, Ken Griffin disclosed 476K shares of SMWB, worth an amount we cannot price. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy SMWB?

Ken Griffin first disclosed a SMWB position in Q2 2021; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell SMWB?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in SMWB. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of SMWB does Ken Griffin own?

Ken Griffin disclosed 476K shares of SMWB as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for SMWB?

Ken Griffin began building the SMWB position before our 13F history starts, so an exact average buy price cannot be estimated without understating it. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.