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Public ownership evidence

Similarweb Ltd. (SMWB) Ownership Disclosures

Read SMWB insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

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2026-09-252026-09-24Offer OrS400Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-09-24 and its public availability date is 2026-09-25. Subtracting those calendar dates gives 1 day of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001976408-26-000866 ↗SEC 0001976408-26-000866 ↗SEC 0001976408-26-000863 ↗

Recent Form 4 activity

Inspect all 28 displayed rows: Recent Form 4 activity

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2026-09-252026-09-24Offer OrS400Not reported
2026-09-252026-09-24Offer OrS113,900Not reported
2026-09-242026-09-23Offer OrS28,400Not reported
2026-09-242026-09-22Offer OrS34,500Not reported
2026-09-222026-09-21Offer OrS32,200Not reported
2026-09-222026-09-18Offer OrS37,500Not reported
2026-09-182026-09-17Offer OrS30,400Not reported
2026-09-182026-09-16Offer OrS45,719Not reported
2026-09-162026-09-15Offer OrS26,691Not reported
2026-09-162026-09-14Offer OrS52,900Not reported
2026-09-162026-09-15Offer OrS26,691Not reported
2026-09-162026-09-14Offer OrS52,900Not reported
2026-09-162026-09-15Offer OrS26,691Not reported
2026-09-162026-09-14Offer OrS52,900Not reported
2026-09-142026-09-11Offer OrS59,000Not reported
2026-09-142026-09-10Offer OrS59,200Not reported
2026-09-102026-09-09Offer OrS86,300Not reported
2026-09-102026-09-08Offer OrS60,700Not reported
2026-08-282026-08-26Offer OrS140,008Not reported
2026-08-282026-08-26Offer OrS39,000Not reported
2026-08-282026-08-26Offer OrS39,302Not reported
2026-08-282026-08-26Offer OrS164,817Not reported
2026-08-182026-08-14Offer OrS75,000Not reported
2026-08-182026-08-14Offer OrS59,992Not reported
2026-08-182026-08-13Offer OrS40,000Not reported
2026-08-182026-08-13Offer OrS106,105Not reported
2026-08-182026-08-13Offer OrS200,000Not reported
2026-08-182026-08-13Offer OrS228,500Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

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Lotus Technology Management, LP2026-06-302026-08-15531,409$3,403,907None
Sphera Management Technology Funds Ltd2026-06-302026-08-15615,000$3,769,950None
Quarry LP2026-06-302026-08-15149$913None
Militia Capital Partners, LP2024-12-312026-08-1530,000$425,100None
XTX Topco Ltd2026-06-302026-08-1510,906$66,854None
Qube Research & Technologies Ltd2026-06-302026-08-1531,847$195,222None
OSAIC HOLDINGS, INC.2026-06-302026-08-15300$1,839None
Schonfeld Strategic Advisors LLC2026-06-302026-08-151,210,629$7,421,154None
JANE STREET GROUP, LLC2026-06-302026-08-15317,117$1,943,927None
JANE STREET GROUP, LLC2026-06-302026-08-15196,160$1,202,461None
JANE STREET GROUP, LLC2026-06-302026-08-1588,700$543,731Call
SUSQUEHANNA INTERNATIONAL GROUP, LLP2026-06-302026-08-15138,417$848,496None
SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC2026-06-302026-08-15169,885$1,041,395None
S SQUARED TECHNOLOGY, LLC2026-06-302026-08-151,690,000$10,359,700None
NANO CAP NEW MILLENNIUM GROWTH FUND L P2026-06-302026-08-15650,000$3,984,500None
MILLENNIUM MANAGEMENT LLC2026-06-302026-08-1518,198$111,554None
Ulysses Management LLC2026-06-302026-08-152,928,474$17,951,546None
LAZARD ASSET MANAGEMENT LLC2026-06-302026-08-1523,566$144,460None
JONES FINANCIAL COMPANIES LLLP2026-06-302026-08-15100$560None
ION Crossover Partners Ltd2026-06-302026-08-153,030,826$18,578,963None
Cresset Asset Management, LLC2026-06-302026-08-1510,144$62,183None
ROYAL BANK OF CANADA2026-06-302026-08-155,900$36,000None
D. E. Shaw & Co., Inc.2026-06-302026-08-1538,535$236,220None
D. E. Shaw & Co., Inc.2026-06-302026-08-15121,400$744,182None
CITADEL ADVISORS LLC2026-06-302026-08-1514,400$88,272Put
CITADEL ADVISORS LLC2026-06-302026-08-15346,735$2,125,486None
CITADEL ADVISORS LLC2026-06-302026-08-1538,800$237,844Call
ARK Investment Management LLC2026-06-302026-08-15834,663$5,116,484None
PRELUDE CAPITAL MANAGEMENT, LLC2026-06-302026-08-1510,411$63,819None
CDC Financial, Inc.2026-06-302026-08-15674,233$4,133,048None
WELLINGTON MANAGEMENT GROUP LLP2026-06-302026-08-151,133,687$6,949,501None
WELLINGTON MANAGEMENT GROUP LLP2026-06-302026-08-1551,504$315,720None
WELLINGTON MANAGEMENT GROUP LLP2026-06-302026-08-152,439,494$14,954,098None
TWO SIGMA INVESTMENTS, LP2026-06-302026-08-15129,851$795,987None
BARCLAYS PLC2026-06-302026-08-15690$4,230None
WELLS FARGO & COMPANY/MN2026-06-302026-08-158,200$50,266None
WELLS FARGO & COMPANY/MN2026-06-302026-08-151,000$6,130None
Pathstone Holdings, LLC2026-06-302026-08-1499,390$609,261None
UBS Group AG2026-06-302026-08-145,128$31,435None
UBS Group AG2026-06-302026-08-14398,200$2,440,966None
Connor, Clark & Lunn Investment Management Ltd.2026-06-302026-08-14445,691$2,732,086None
PEAK6 LLC2026-06-302026-08-14484,822$2,971,959None
PEAK6 LLC2026-06-302026-08-143,000$18,390Call
MARSHALL WACE, LLP2026-06-302026-08-1455,759$341,803None
MARSHALL WACE, LLP2026-06-302026-08-145,222$32,011None
MYDA Advisors LLC2026-06-302026-08-14100,000$613,000None
MENORA MIVTACHIM HOLDINGS LTD.2026-06-302026-08-144,015,494$24,614,978None
Centiva Capital, LP2026-06-302026-08-1445,919$281,483None
ACADIAN ASSET MANAGEMENT LLC2026-06-302026-08-146,750$41,000None
RENAISSANCE TECHNOLOGIES LLC2026-06-302026-08-14713,728$4,375,153None

90-day public filing window, up to 50 source positions.

Lotus Technology Management, LP ↗Sphera Management Technology Funds Ltd ↗Quarry LP ↗Militia Capital Partners, LP ↗XTX Topco Ltd ↗Qube Research & Technologies Ltd ↗OSAIC HOLDINGS, INC. ↗Schonfeld Strategic Advisors LLC ↗JANE STREET GROUP, LLC ↗JANE STREET GROUP, LLC ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

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Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.