DaveManuel.com · Institutional Ownership · Who Owns It
SIMILARWEB LTD (SMWB)
Institutional ownership reported to the SEC as of Q2 2026, across 22 quarters.
71
Reporting holders
$247.7M
Reported value
0.7%
Calls
0.0%
Puts
-10
Holder change
Calls and puts are the parts of reported value carried in derivative lines rather than shares, and they point in opposite directions: a manager holding calls is positioned for the security, one holding puts against it - or hedging shares they already own, which is why index funds carry so many. Most sites add the two together and report one figure, which averages away the only interesting part.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| NASPERS LTD | $68.5M | 11,173,265 | 81.19% | 19q | HELD |
| MENORA MIVTACHIM HOLDINGS LTD. | $24.6M | 4,015,494 | 0.10% | 9q | HELD |
| WELLINGTON MANAGEMENT GROUP LLP | $22.2M | 3,624,685 | 0.00% | 6q | +22.2%+$4.0M |
| ION Crossover Partners Ltd | $18.6M | 3,030,826 | 24.88% | 13q | HELD |
| Ulysses Management LLC | $18.0M | 2,928,474 | 3.55% | 19q | -2.3%-$429.1K |
| S SQUARED TECHNOLOGY, LLC | $10.4M | 1,690,000 | 3.21% | 10q | +5.6%+$551.7K |
| Schonfeld Strategic Advisors LLC | $7.4M | 1,210,629 | 0.03% | 2q | +318.7%+$5.6M |
| Y.D. More Investments Ltd | $7.0M | 1,147,035 | 0.22% | 12q | HELD |
| ARK Investment Management LLC | $5.1M | 834,663 | 0.03% | 20q | +137.1%+$3.0M |
| RENAISSANCE TECHNOLOGIES LLC | $4.4M | 713,728 | 0.01% | 17q | -3.5%-$159.0K |
| CDC Financial, Inc. | $4.1M | 674,233 | 1.73% | 3q | +5.5%+$215.9K |
| Alpha Family Trust | $4.0M | 658,935 | 1.62% | 21q | HELD |
| NANO CAP NEW MILLENNIUM GROWTH FUND L P | $4.0M | 650,000 | 3.06% | 3q | +66.7%+$1.6M |
| HERALD INVESTMENT MANAGEMENT Ltd | $4.0M | 645,465 | 0.54% | 6q | HELD |
| P.A.W. CAPITAL CORP | $3.9M | 640,000 | 3.00% | 8q | +28.0%+$858.2K |
| Sphera Management Technology Funds Ltd | $3.8M | 615,000 | 1.32% | 7q | HELD |
| JANE STREET GROUP, LLC | $3.7M incl. $543.7K options CALL | 513,277 | 0.00% | 7q | +121.9%+$2.0M |
| CenterBook Partners LP | $3.7M | 599,737 | 0.18% | 8q | -54.7%-$4.4M |
| Lotus Technology Management, LP | $3.4M | 531,409 | 4.18% | new | NEW |
| PEAK6 LLC | $3.0M incl. $18.4K options CALL | 484,822 | 0.01% | 6q | +51.0%+$1.0M |
| Connor, Clark & Lunn Investment Management Ltd. | $2.7M | 445,691 | 0.01% | 10q | -16.5%-$539.1K |
| UBS Group AG | $2.5M | 403,328 | 0.00% | 15q | +103.1%+$1.3M |
| CITADEL ADVISORS LLC | $2.5M incl. $326.1K options CALL+PUT | 346,735 | 0.00% | 11q | -27.2%-$914.0K |
| MORGAN STANLEY | $1.6M | 268,203 | 0.00% | 21q | -54.7%-$2.0M |
| LAVELLE CAPITAL LP | $1.2M | 202,727 | 0.54% | 3q | HELD |
| Persistent Asset Partners Ltd | $1.1M | 180,000 | 0.33% | 3q | HELD |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $1.0M | 169,885 | 0.02% | 2q | +35.2%+$271.3K |
| D. E. Shaw & Co., Inc. | $980.4K | 159,935 | 0.00% | 13q | +173.2%+$621.5K |
| ANTIPODES PARTNERS Ltd | $892.5K | 145,601 | 0.02% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $848.5K | 138,417 | 0.00% | new | NEW |
| BlackRock, Inc. | $818.6K | 133,533 | 0.00% | 8q | +4.7%+$37.0K |
| TWO SIGMA INVESTMENTS, LP | $796.0K | 129,851 | 0.00% | 2q | +64.2%+$311.3K |
| GROUP ONE TRADING LLC | $760.7K CALL | options only | 0.00% | new | OPTIONS |
| MYDA Advisors LLC | $613.0K | 100,000 | 0.09% | new | NEW |
| Pathstone Holdings, LLC | $609.3K | 99,390 | 0.00% | 11q | +97.2%+$300.4K |
| GSA CAPITAL PARTNERS LLP | $588.0K | 95,899 | 0.04% | 2q | -37.0%-$344.6K |
| State of Wyoming | $542.2K | 88,458 | 0.05% | new | NEW |
| STATE STREET CORP | $472.3K | 77,054 | 0.00% | 12q | -29.6%-$198.3K |
| Quadrature Capital Ltd | $418.1K | 68,207 | 0.00% | 2q | -27.6%-$159.5K |
| IMC-Chicago, LLC | $395.4K incl. $165.5K options CALL | 37,506 | 0.00% | new | NEW |
| MARSHALL WACE, LLP | $373.8K | 60,981 | 0.00% | 21q | -90.4%-$3.5M |
| SIMPLEX TRADING, LLC | $317.9K incl. $115.2K options CALL+PUT | 33,066 | 0.00% | 6q | +1038.6%+$290.0K |
| Centiva Capital, LP | $281.5K | 45,919 | 0.00% | 2q | -23.6%-$87.1K |
| WealthTrust Axiom LLC | $273.2K | 44,565 | 0.06% | new | NEW |
| Qube Research & Technologies Ltd | $195.2K | 31,847 | 0.00% | 3q | -92.3%-$2.4M |
| LAZARD ASSET MANAGEMENT LLC | $144.5K | 23,566 | 0.00% | 8q | +109.9%+$75.6K |
| SG Americas Securities, LLC | $135.0K | 22,064 | 0.00% | new | NEW |
| MILLENNIUM MANAGEMENT LLC | $111.6K | 18,198 | 0.00% | 14q | -97.8%-$5.0M |
| Integrated Wealth Concepts LLC | $92.0K | 15,000 | 0.00% | new | NEW |
| R Squared Ltd | $69.0K | 11,256 | 0.04% | new | NEW |
| XTX Topco Ltd | $66.9K | 10,906 | 0.00% | 2q | -95.2%-$1.3M |
| PRELUDE CAPITAL MANAGEMENT, LLC | $63.8K | 10,411 | 0.00% | new | NEW |
| PharVision Advisers, LLC | $63.6K | 10,368 | 1.20% | 3q | -45.2%-$52.5K |
| Olympiad Research LP | $63.4K | 10,337 | 0.13% | new | NEW |
| Cresset Asset Management, LLC | $62.2K | 10,144 | 0.00% | 2q | HELD |
| MARATHON CAPITAL MANAGEMENT | $61.3K | 10,000 | 0.01% | new | NEW |
| WELLS FARGO & COMPANY/MN | $56.4K | 9,200 | 0.00% | 19q | +12.2%+$6.1K |
| CITIGROUP INC | $46.0K | 7,511 | 0.00% | 21q | -93.2%-$629.3K |
| ACADIAN ASSET MANAGEMENT LLC | $41.0K | 6,750 | 0.00% | 4q | -98.3%-$2.4M |
| ROYAL BANK OF CANADA | $36.0K | 5,900 | 0.00% | 14q | +2850.0%+$34.8K |
| SBI Securities Co., Ltd. | $6.3K | 1,024 | 0.00% | 6q | HELD |
| BARCLAYS PLC | $4.2K | 690 | 0.00% | 13q | -93.5%-$60.8K |
| Tower Research Capital LLC (TRC) | $2.4K | 399 | 0.00% | new | NEW |
| OSAIC HOLDINGS, INC. | $1.8K | 300 | 0.00% | 9q | HELD |
| Quarry LP | $913 | 149 | 0.00% | new | NEW |
| JONES FINANCIAL COMPANIES LLLP | $560 | 100 | 0.00% | 8q | HELD |
| Smartleaf Asset Management LLC | $179 | 29 | 0.00% | 3q | HELD |
| Caitong International Asset Management Co., Ltd | $67 | 11 | 0.00% | 3q | -95.5%-$1.4K |
| FMR LLC | $37 | 6 | 0.00% | 15q | HELD |
| Farther Finance Advisors, LLC | $16 | 3 | 0.00% | new | NEW |
| Covestor Ltd | $0 | none filed | 0.00% | new | NEW |
What the insiders did
Open market purchases and sales reported on Form 4 in the last 180 days. Grants, option exercises and shares surrendered to cover tax are left out: they are compensation rather than a decision to buy or sell. Where a broker filled one order in tranches the lines are summed, because it was one decision.
Officers and directors
| Date | Insider | Role | Side | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-13 | Offer Or | Chief Executive Officer | Sold | 574,605 | $5.1M ×4 |
| 2026-08-26 | Offer Or | Chief Executive Officer | Sold | 383,127 | $3.4M ×4 |
| 2026-08-14 | Offer Or | Chief Executive Officer | Sold | 134,992 | $1.2M ×2 |
| 2026-09-24 | Offer Or | Chief Executive Officer | Sold | 114,300 | $879.1K ×2 |
| 2026-09-09 | Offer Or | Chief Executive Officer | Sold | 86,300 | $695.3K |
| 2026-09-08 | Offer Or | Chief Executive Officer | Sold | 60,700 | $505.6K |
| 2026-09-10 | Offer Or | Chief Executive Officer | Sold | 59,200 | $477.3K |
| 2026-09-11 | Offer Or | Chief Executive Officer | Sold | 59,000 | $474.9K |
| 2026-09-14 | Offer Or | Chief Executive Officer | Sold | 52,900 | $451.6K |
| 2026-09-14 | Offer Or | Chief Executive Officer | Sold | 52,900 | $451.6K |
| 2026-09-14 | Offer Or | Chief Executive Officer | Sold | 52,900 | $451.6K |
| 2026-09-16 | Offer Or | Chief Executive Officer | Sold | 45,719 | $383.9K |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q3 2026 | 11 | $3.3M | 428,206 | 6 | 1 | 1 | 0.0% |
| Q2 2026 | 71 | $247.7M | 40,072,797 | 19 | 19 | 19 | 0.8% |
| Q1 2026 | 81 | $117.8M | 42,719,712 | 19 | 31 | 18 | 0.4% |
| Q4 2025 | 99 | $379.1M | 49,802,779 | 15 | 27 | 33 | 1.7% |
| Q3 2025 | 96 | $451.4M | 45,791,663 | 11 | 29 | 35 | 5.6% |
| Q2 2025 | 112 | $370.8M | 44,110,152 | 21 | 47 | 26 | 4.5% |
| Q1 2025 | 112 | $386.7M | 44,869,261 | 25 | 31 | 40 | 4.0% |
| Q4 2024 | 116 | $601.5M | 41,364,757 | 25 | 45 | 25 | 2.6% |
| Q3 2024 | 95 | $314.9M | 35,522,262 | 27 | 36 | 16 | 0.3% |
| Q2 2024 | 78 | $236.8M | 30,453,154 | 10 | 27 | 26 | 0.1% |
| Q1 2024 | 75 | $274.4M | 30,357,166 | 26 | 22 | 15 | 0.6% |
| Q4 2023 | 54 | $150.3M | 27,667,396 | 7 | 18 | 13 | 0.0% |
| Q3 2023 | 52 | $243.0M | 37,637,008 | 14 | 14 | 13 | 0.0% |
| Q2 2023 | 49 | $210.4M | 28,062,284 | 10 | 12 | 17 | 12.5% |
| Q1 2023 | 42 | $194.7M | 28,790,579 | 10 | 12 | 6 | 0.0% |
| Q4 2022 | 48 | $190.2M | 28,985,254 | 13 | 8 | 14 | 3.0% |
| Q3 2022 | 43 | $164.5M | 27,228,011 | 6 | 18 | 6 | 2.8% |
| Q2 2022 | 46 | $227.5M | 27,344,285 | 15 | 10 | 13 | 0.8% |
| Q1 2022 | 43 | $369.8M | 28,312,545 | 5 | 12 | 14 | 0.8% |
| Q4 2021 | 45 | $1.1B | 60,530,151 | 20 | 10 | 6 | 0.2% |
| Q3 2021 | 34 | $3.0B | 144,839,586 | 10 | 5 | 12 | 0.0% |
| Q2 2021 | 45 | $294.1M | 14,926,736 | 45 | 0 | 0 | 0.0% |