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Public ownership evidence

Ambarella, Inc. Ordinary Shares (AMBA) Ownership Disclosures

Read AMBA 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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2026-09-282026-09-25PAISLEY CHRISTOPHER BS250Not reported

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

The displayed observation date is 2026-09-25 and its public availability date is 2026-09-28. Subtracting those calendar dates gives 3 days 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 0001280263-26-000077 ↗SEC 0001280263-26-000075 ↗SEC 0001280263-26-000073 ↗

Recent Form 4 activity

Inspect all 13 displayed rows: Recent Form 4 activity

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2026-09-282026-09-25PAISLEY CHRISTOPHER BS250Not reported
2026-09-212026-09-18Young John AlexanderS1,896Not reported
2026-09-182026-09-17Wang Feng-MingS6,086Not reported
2026-09-182026-09-17Ju Chi-HongS2,009Not reported
2026-09-182026-09-17Lee Chan WS2,893Not reported
2026-09-182026-09-17Young John AlexanderS3,126Not reported
2026-09-102026-09-08Hu ChenmingA3,151Not reported
2026-09-102026-09-08Bryant Gregory MA3,151Not reported
2026-09-102026-09-08Breithaupt Chantelle YvetteA3,151Not reported
2026-09-102026-09-08Schwarting Elizabeth MA3,151Not reported
2026-09-102026-09-08Hon Hsiao-WuenA3,151Not reported
2026-09-102026-09-08RICHARDSON DAVID JEFFREYA3,151Not reported
2026-09-102026-09-08PAISLEY CHRISTOPHER BA3,151Not 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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Advisors Asset Management, Inc.2021-12-312026-08-281,182$239,816None
Advisors Asset Management, Inc.2022-12-312026-08-281,323$108,790None
Advisors Asset Management, Inc.2022-06-302026-08-281,685$110,000None
Advisors Asset Management, Inc.2021-09-302026-08-28461$72,000None
Advisors Asset Management, Inc.2024-03-312026-08-27238$12,083None
Advisors Asset Management, Inc.2025-03-312026-08-27935$47,059None
Advisors Asset Management, Inc.2022-09-302026-08-271,685$95,000None
Advisors Asset Management, Inc.2022-03-312026-08-271,537$161,262None
Advisors Asset Management, Inc.2023-06-302026-08-27651$54,469None
Advisors Asset Management, Inc.2023-09-302026-08-27467$24,765None
Advisors Asset Management, Inc.2023-03-312026-08-27720$55,742None
Advisors Asset Management, Inc.2025-09-302026-08-271,502$123,945None
Advisors Asset Management, Inc.2023-12-312026-08-27317$19,429None
VIRGINIA RETIREMENT SYSTEMS ET Al2026-06-302026-08-262,700$231,660None
Advisors Asset Management, Inc.2025-06-302026-08-251,134$74,918None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2547,979$4,116,598None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-254,116,598$47,979,000None
Advisors Asset Management, Inc.2024-09-302026-08-22306$17,260None
Advisors Asset Management, Inc.2024-06-302026-08-22224$12,085None
Advisors Asset Management, Inc.2024-12-312026-08-22649$47,208None
Advisors Asset Management, Inc.2025-12-312026-08-221,987$140,759None
GILL CAPITAL PARTNERS, LLC2026-06-302026-08-2122$1,888None
MERCER GLOBAL ADVISORS INC /ADV2026-06-302026-08-2013,218$1,134,069None
Ensign Peak Advisors, Inc2026-03-312026-08-192,640$135,894None
Ensign Peak Advisors, Inc2025-12-312026-08-192,640$187,018None
Ensign Peak Advisors, Inc2025-09-302026-08-198,590$708,847None
Jacobs Equity LLC2026-06-302026-08-183,275$280,995None
Strive Financial Group ,LLC2026-06-302026-08-18128$10,982None
Transamerica Financial Advisors, LLC2026-06-302026-08-1812$1,029None
CAPSTONE INVESTMENT ADVISORS, LLC2026-06-302026-08-186,480$555,984None
CENTAURUS FINANCIAL, INC.2026-06-302026-08-183,961$340,000None
Odyssean, LLC2026-06-302026-08-1526,188$2,246,930None
WESTERLY CAPITAL MANAGEMENT, LLC2026-06-302026-08-1580,000$6,864,000None
STANCE CAPITAL LLC2026-06-302026-08-1514$1,201None
Synergy Investment Management, LLC2026-06-302026-08-1515$1,287None
Graham Capital Management, L.P.2026-06-302026-08-154,510$386,958None
SEI INVESTMENTS CO2026-06-302026-08-1562,740$5,383,092None
SEI INVESTMENTS CO2026-06-302026-08-15115$9,870None
Federation des caisses Desjardins du Quebec2026-06-302026-08-15460$39,468None
JPL Wealth Management, LLC2026-06-302026-08-15275$23,595None
Advisors Asset Management, Inc.2026-06-302026-08-151,911$163,964None
Marex Group Ltd2026-06-302026-08-1523,437$2,010,895None
Basecamp Wealth Advisors LLC2026-06-302026-08-15147$12,613None
Polymer Capital Management (US) LLC2026-06-302026-08-1520,355$1,746,459None
Quarry LP2026-06-302026-08-1544$3,775None
Artemis Wealth Advisors, LLC2026-06-302026-08-1512,000$1,029,600None
Ameritas Advisory Services, LLC2026-06-302026-08-1570$6,014None
T. Rowe Price Investment Management, Inc.2026-06-302026-08-15513,569$44,065,000None
SORA INVESTORS LLC2026-06-302026-08-15100,935$8,660,223None
XTX Topco Ltd2026-06-302026-08-154,720$404,976None

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

Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗Advisors Asset Management, Inc. ↗

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.