Welcome to our dedicated page for Ambarella SEC filings (Ticker: AMBA), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The Ambarella, Inc. (NASDAQ: AMBA) SEC filings page on Stock Titan aggregates the company’s regulatory disclosures from the U.S. Securities and Exchange Commission, alongside AI-powered tools to help interpret them. Ambarella describes itself in these filings as a Cayman Islands company whose ordinary shares trade on the Nasdaq Global Select Market under the symbol AMBA, and as an edge AI semiconductor company focused on low-power systems-on-chip (SoCs) for edge AI and human vision applications.
Key filings for Ambarella include its annual reports on Form 10-K and quarterly reports on Form 10-Q, which provide detailed information on its business, risk factors, financial statements and edge AI strategy. Current reports on Form 8-K document material events such as the release of quarterly financial results and certain management changes. For example, recent 8-K filings reference the announcement of fiscal 2026 quarterly results and the voluntary resignation of the company’s Chief Technology Officer from that role and from the board, with a transition to a part-time Chief Technology Advisor position.
These filings also describe Ambarella’s use of non-GAAP financial measures, including non-GAAP gross margin and non-GAAP net income or loss, and provide reconciliations to the closest GAAP metrics. Risk disclosures in the filings discuss factors that could affect Ambarella’s performance, such as global economic conditions, customer adoption of products incorporating its SoCs, competition and the company’s ability to develop and monetize advanced AI and computer vision technologies.
On Stock Titan, investors can review Ambarella’s 10-K and 10-Q reports, 8-K current reports and related exhibits, with AI-generated summaries that highlight important sections and explain complex terminology. The platform also surfaces new filings in near real time as they appear on EDGAR, helping users track changes in Ambarella’s financial condition, governance and edge AI business disclosures without reading every page manually.
Leslie Kohn, Chief Technology Officer and director of Ambarella, reported a small sale of company stock on 09/17/2025. The filing shows 2,249 ordinary shares were sold at $79.43 per share under transaction code S, with the stated purpose that the shares were sold to pay tax obligations arising from restricted stock unit vesting.
After the sale, the filing reports 977,428 shares beneficially owned by Kohn. The transaction appears routine and limited in size relative to the reported holdings.
Chi-Hong Ju, Senior Vice President, Systems at Ambarella Inc (AMBA), reported a sale of 1,168 ordinary shares on 09/17/2025 at a price of $79.43 per share to cover tax obligations arising from the vesting of restricted stock units. After the transaction Mr. Ju directly beneficially owns 170,087 ordinary shares and indirectly holds 8,000 shares through a foundation. The filing also notes Mr. Ju acquired 223 shares under the company’s employee stock purchase plan on 09/15/2025. The Form 4 was signed by an attorney-in-fact on behalf of Mr. Ju on 09/19/2025.
Filing snapshot: AMBARELLA INC director and CEO Feng-Ming Wang reported a sale of 4,928 ordinary shares on 09/17/2025 at $79.43 per share. The filing states the sale was to pay tax obligations arising from the vesting of restricted stock units. After the transaction, Mr. Wang beneficially owned 788,929 shares, which the filing notes includes 223 shares purchased under the companys employee stock purchase plan on 09/15/2025.
Form 144 filed for Ambarella, Inc. (AMBA): The notice reports a proposed sale of 1,000 common shares through Morgan Stanley Smith Barney on 09/19/2025 with an aggregate market value of $84,000. The shares were acquired as performance shares on 03/15/2021. The filer, identified in related sales as Christopher Day, sold common shares on 07/14/2025 (2,907 shares), 09/08/2025 (1,772 shares), 09/17/2025 (361 shares), and 09/18/2025 (829 shares). The filing includes the standard representation that the seller is not aware of undisclosed material adverse information.
Form 144 notice: An insider filing indicates proposed and recent sales of Ambarella Inc. common stock under Rule 144. The notice lists a proposed sale of 829 shares through Morgan Stanley Smith Barney on 09/18/2025 on NASDAQ with an aggregate market value of $68,392.50. Acquisition data show 611 shares received as restricted stock on 09/15/2025 and 218 shares purchased via an Employee Stock Purchase Plan on 03/15/2024. Recent sales by the filer, Christopher Day at the Santa Clara address, total 5,551 shares across four transactions from 07/14/2025 to 09/17/2025 with gross proceeds reported.
Ambarella, Inc. (AMBA) Form 144 notice reports a proposed sale of 8,492 shares of Ambarella common stock through Morgan Stanley Smith Barney LLC. The filer acquired these shares as restricted stock on 06/15/2019. The planned approximate sale date is 09/10/2025 on the NASDAQ, with an aggregate market value reported at $716,894.64. The filing lists 42,689,006 shares outstanding, and indicates no related sales in the past three months. The notice includes the standard representation that the seller is unaware of any undisclosed material adverse information and a signature declaration regarding the accuracy of the notice.
Ambarella, Inc. (AMBA) filed a Form 144 reporting proposed insider sales of common stock. The filing notifies a brokered sale of 1,772 shares with an aggregate market value of $150,620, to be executed approximately on 09/08/2025 on NASDAQ. The seller previously acquired 1,463 restricted shares on 03/15/2021 and 309 restricted shares on 06/15/2022. The filing also discloses two recent open-market sales by the same person: 2,907 shares on 07/14/2025 for $194,289.32 and 342 shares on 06/17/2025 for $17,872.10. The notice includes the signer’s representation that no undisclosed material adverse information is known.
Ambarella, Inc. director Chantelle Y. Breithaupt received an annual grant of 2,498 restricted stock units (RSUs). The grant, approved by the board and effective September 2, 2025, vests in four equal quarterly installments beginning September 15, 2025, and becomes fully vested on September 15, 2026, subject to continued service. After the reported acquisition, Ms. Breithaupt beneficially owned 4,940 ordinary shares. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person on September 4, 2025.
Ambarella director Elizabeth M. Schwarting received an annual restricted stock unit (RSU) award of 2,498 ordinary shares approved by the board, reported as a transaction dated 09/02/2025. The grant has a vesting schedule that vests one-fourth every three months beginning with a vesting start date of 09/15/2025 and becomes fully vested on 09/15/2026, subject to continued service. The Form 4 shows Schwarting beneficially owns 9,978 shares following the grant and the reported price for the award is listed as $0.0, consistent with an equity grant rather than a purchase.
Ambarella, Inc. director Hsiao-Wuen Hon received an annual restricted stock unit (RSU) award of 2,498 ordinary shares, effective September 2, 2025. The filing shows the grant was approved by the Board and reported on Form 4, with 30,776 shares reported as beneficially owned by Mr. Hon after the award. The RSUs vest in four quarterly installments beginning September 15, 2025, with 1/4th of the shares vesting each three months and full vesting on September 15, 2026, subject to continued service. The Form 4 was signed by an attorney-in-fact on behalf of the reporting person.