Ambarella Inc SEC filings AMBA
Ambarella Inc has 1,000 filings in SEC EDGAR's recent list, going back to Feb 17, 2017. Its latest annual report, Form ARS, was filed on May 15, 2026 for the period ended Jan 31, 2026. The latest quarterly report (Form 10-Q) was filed on Sep 4, 2026, covering the quarter ended Jul 31, 2026. The most recent current report (Form 8-K) was filed on Sep 3, 2026 (results of operations). The company's fiscal year ends on January 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2026 | — |
| 4 | Insider transaction | Sep 28, 2026 | Sep 25, 2026 |
| 144 | Notice of proposed sale | Sep 25, 2026 | — |
| 4 | Insider transaction | Sep 21, 2026 | Sep 18, 2026 |
| 4 | Insider transaction | Sep 18, 2026 | Sep 17, 2026 |
| 4 | Insider transaction | Sep 18, 2026 | Sep 17, 2026 |
| 4 | Insider transaction | Sep 18, 2026 | Sep 17, 2026 |
| 4 | Insider transaction | Sep 18, 2026 | Sep 17, 2026 |
| 144 | Notice of proposed sale | Sep 18, 2026 | — |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 10-Q | Quarterly report | Sep 4, 2026 | Jul 31, 2026 |
| 8-K |
Current report
Results of operations
|
Sep 3, 2026 | Sep 3, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 14, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 7, 2026 | — |
| S-8 | Employee stock plan registration | Aug 3, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jul 31, 2026 | — |
| 4 | Insider transaction | Jul 10, 2026 | Jul 9, 2026 |
| 144 | Notice of proposed sale | Jul 9, 2026 | — |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
Jul 1, 2026 | Jun 26, 2026 |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 4 | Insider transaction | Jun 30, 2026 | Jun 26, 2026 |
| 144 | Notice of proposed sale | Jun 26, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 4 | Insider transaction | Jun 16, 2026 | Jun 12, 2026 |
| 144 | Notice of proposed sale | Jun 12, 2026 | — |
| DEFA14A | Additional proxy material | Jun 10, 2026 | — |
| 10-Q | Quarterly report | Jun 2, 2026 | Apr 30, 2026 |
| SD | Specialized disclosure (conflict minerals) | May 29, 2026 | — |
| 4 | Insider transaction | May 28, 2026 | May 26, 2026 |
| 4 | Insider transaction | May 28, 2026 | May 26, 2026 |
| 8-K |
Current report
Results of operations
|
May 28, 2026 | May 28, 2026 |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| 144 | Notice of proposed sale | May 26, 2026 | — |
| ARS | Annual report to shareholders | May 15, 2026 | Jan 31, 2026 |
| DEFA14A | Additional proxy material | May 15, 2026 | — |
| DEF 14A | Proxy statement | May 15, 2026 | Jun 26, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2026 | — |
| 4 | Insider transaction | Apr 22, 2026 | Apr 21, 2026 |
| 144 | Notice of proposed sale | Apr 21, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 10-K | Annual report | Mar 23, 2026 | Jan 31, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 19, 2026 | Mar 17, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 4 | Insider transaction | Mar 4, 2026 | Mar 2, 2026 |
| 3 | Initial insider ownership | Mar 4, 2026 | Feb 23, 2026 |
| 144 | Notice of proposed sale | Mar 2, 2026 | — |
| 8-K |
Current report
Officer or director change
|
Feb 27, 2026 | Feb 23, 2026 |
| 8-K |
Current report
Results of operations, Officer or director change
|
Feb 26, 2026 | Feb 23, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 30, 2026 | — |
| 4/A | Primary document | Jan 23, 2026 | Dec 30, 2025 |
| 4 | Insider transaction | Jan 7, 2026 | Jan 5, 2026 |
| 144 | Notice of proposed sale | Jan 5, 2026 | — |
| 4 | Insider transaction | Dec 31, 2025 | Dec 30, 2025 |
| 144 | Notice of proposed sale | Dec 30, 2025 | — |
| 4 | Insider transaction | Dec 29, 2025 | Dec 26, 2025 |
| 144 | Notice of proposed sale | Dec 29, 2025 | — |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 4 | Insider transaction | Dec 18, 2025 | Dec 16, 2025 |
| 144 | Notice of proposed sale | Dec 18, 2025 | — |
| 4 | Insider transaction | Dec 17, 2025 | Dec 15, 2025 |
| 144 | Notice of proposed sale | Dec 16, 2025 | — |
| 10-Q | Quarterly report | Dec 4, 2025 | Oct 31, 2025 |
| 144 | Notice of proposed sale | Dec 2, 2025 | — |
| 8-K |
Current report
Results of operations, Officer or director change
|
Nov 25, 2025 | Nov 24, 2025 |
| 4 | Insider transaction | Oct 15, 2025 | Oct 13, 2025 |
| 144 | Notice of proposed sale | Oct 14, 2025 | — |
| 144 | Notice of proposed sale | Oct 14, 2025 | — |
| 4 | Insider transaction | Oct 8, 2025 | Oct 6, 2025 |
| 144 | Notice of proposed sale | Oct 6, 2025 | — |
| 144 | Notice of proposed sale | Sep 22, 2025 | — |
| 4 | Insider transaction | Sep 19, 2025 | Sep 17, 2025 |
| 4 | Insider transaction | Sep 19, 2025 | Sep 17, 2025 |
| 4 | Insider transaction | Sep 19, 2025 | Sep 17, 2025 |
| 4 | Insider transaction | Sep 19, 2025 | Sep 17, 2025 |
| 4 | Insider transaction | Sep 19, 2025 | Sep 17, 2025 |
| 144 | Notice of proposed sale | Sep 19, 2025 | — |
| 144 | Notice of proposed sale | Sep 18, 2025 | — |
| 4 | Insider transaction | Sep 12, 2025 | Sep 10, 2025 |
| 144 | Notice of proposed sale | Sep 10, 2025 | — |
| 144 | Notice of proposed sale | Sep 8, 2025 | — |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 10-Q | Quarterly report | Sep 3, 2025 | Jul 31, 2025 |
| 8-K |
Current report
Results of operations
|
Aug 28, 2025 | Aug 28, 2025 |
| 144 | Notice of proposed sale | Jul 14, 2025 | — |
| 4 | Insider transaction | Jun 27, 2025 | Jun 25, 2025 |
| 144 | Notice of proposed sale | Jun 25, 2025 | — |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 4 | Insider transaction | Jun 20, 2025 | Jun 17, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 6, 2025 | Jun 4, 2025 |
| 10-Q | Quarterly report | Jun 3, 2025 | Apr 30, 2025 |
| SD | Specialized disclosure (conflict minerals) | Jun 2, 2025 | — |
| 8-K |
Current report
Results of operations
|
May 29, 2025 | May 29, 2025 |
| ARS | Annual report to shareholders | Apr 25, 2025 | Jan 31, 2025 |
| DEFA14A | Additional proxy material | Apr 25, 2025 | — |
| DEF 14A | Proxy statement | Apr 25, 2025 | Jun 4, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 23, 2025 | — |
| 8-K |
Current report
Officer or director change
|
Apr 4, 2025 | Apr 2, 2025 |
| 10-K | Annual report | Mar 28, 2025 | Jan 31, 2025 |
| 4 | Insider transaction | Mar 26, 2025 | Mar 25, 2025 |
| 144 | Notice of proposed sale | Mar 25, 2025 | — |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 20, 2025 | Mar 18, 2025 |
| 4 | Insider transaction | Mar 18, 2025 | Mar 17, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Feb 28, 2025 |
| 3 | Initial insider ownership | Mar 4, 2025 | Feb 25, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 28, 2025 | Feb 24, 2025 |
| 8-K |
Current report
Results of operations
|
Feb 26, 2025 | Feb 26, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 4 | Insider transaction | Jan 17, 2025 | Jan 15, 2025 |
| 144 | Notice of proposed sale | Jan 16, 2025 | — |
| 144 | Notice of proposed sale | Jan 15, 2025 | — |
| 4 | Insider transaction | Jan 14, 2025 | Jan 10, 2025 |
| 144 | Notice of proposed sale | Jan 14, 2025 | — |
| 144 | Notice of proposed sale | Jan 13, 2025 | — |
| 144 | Notice of proposed sale | Jan 10, 2025 | — |
| 4 | Insider transaction | Jan 8, 2025 | Jan 6, 2025 |
| 144 | Notice of proposed sale | Jan 8, 2025 | — |
| 4 | Insider transaction | Jan 7, 2025 | Jan 3, 2025 |
| 144 | Notice of proposed sale | Jan 7, 2025 | — |
| 144 | Notice of proposed sale | Jan 6, 2025 | — |
| 144 | Notice of proposed sale | Jan 3, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Jan 2, 2025 |
| 144 | Notice of proposed sale | Jan 3, 2025 | — |
| 144 | Notice of proposed sale | Jan 2, 2025 | — |
| 8-K |
Current report
Material agreement
|
Dec 27, 2024 | Dec 20, 2024 |
| 4 | Insider transaction | Dec 26, 2024 | Dec 26, 2024 |
| 144 | Notice of proposed sale | Dec 26, 2024 | — |
| 4 | Insider transaction | Dec 20, 2024 | Dec 18, 2024 |
| 4 | Insider transaction | Dec 20, 2024 | Dec 18, 2024 |
| 144 | Notice of proposed sale | Dec 18, 2024 | — |
| 144 | Notice of proposed sale | Dec 18, 2024 | — |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 18, 2024 | Dec 16, 2024 |
| 4 | Insider transaction | Dec 16, 2024 | Dec 13, 2024 |
| 4 | Insider transaction | Dec 10, 2024 | Dec 9, 2024 |
| 144 | Notice of proposed sale | Dec 9, 2024 | — |
| 4 | Insider transaction | Dec 6, 2024 | Dec 4, 2024 |
| S-8 | Employee stock plan registration | Dec 6, 2024 | — |
| 10-Q | Quarterly report | Dec 6, 2024 | Oct 31, 2024 |
| 4 | Insider transaction | Dec 3, 2024 | Dec 2, 2024 |
| 144 | Notice of proposed sale | Dec 2, 2024 | — |
| 8-K |
Current report
Results of operations
|
Nov 26, 2024 | Nov 26, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 12, 2024 | — |
| SC 13G | Ownership over 5% (passive) | Nov 4, 2024 | — |
| 4 | Insider transaction | Oct 9, 2024 | Oct 7, 2024 |
| 4 | Insider transaction | Oct 4, 2024 | Oct 3, 2024 |
| 144 | Notice of proposed sale | Sep 30, 2024 | — |
| 4 | Insider transaction | Sep 26, 2024 | Sep 25, 2024 |
| 4 | Insider transaction | Sep 25, 2024 | Sep 24, 2024 |
| 144 | Notice of proposed sale | Sep 25, 2024 | — |
| 144 | Notice of proposed sale | Sep 24, 2024 | — |
| 4 | Insider transaction | Sep 19, 2024 | Sep 17, 2024 |
| 4 | Insider transaction | Sep 19, 2024 | Sep 17, 2024 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Semiconductors & Related Devices (SIC 3674)
- Listed as
- AMBA (Nasdaq)
- Fiscal year ends
- January 31
- Headquarters
- Santa Clara, CA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1280263
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.