Magnite, Inc. SEC filings MGNI
Magnite, Inc. has 1,006 filings in SEC EDGAR's recent list, going back to Jan 17, 2019. Its latest annual report, Form ARS, was filed on Apr 21, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 4, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Nov 4, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 144 | Notice of proposed sale | Nov 5, 2026 | — |
| 144 | Notice of proposed sale | Nov 5, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 5, 2026 | — |
| 10-Q | Quarterly report | Nov 4, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Results of operations
|
Nov 4, 2026 | Nov 4, 2026 |
| 4 | Insider transaction | Oct 14, 2026 | Oct 12, 2026 |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Oct 7, 2026 | Oct 7, 2026 |
| 4 | Insider transaction | Oct 2, 2026 | Oct 1, 2026 |
| 4 | Insider transaction | Oct 2, 2026 | Oct 1, 2026 |
| 3 | Initial insider ownership | Oct 2, 2026 | Oct 1, 2026 |
| 8-K |
Current report
Officer or director change
|
Sep 21, 2026 | Sep 21, 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 17, 2026 | — |
| 144 | Notice of proposed sale | Sep 17, 2026 | — |
| 4 | Insider transaction | Sep 16, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 16, 2026 | Sep 14, 2026 |
| 144 | Notice of proposed sale | Sep 14, 2026 | — |
| 144 | Notice of proposed sale | Sep 14, 2026 | — |
| 4 | Insider transaction | Sep 11, 2026 | Sep 11, 2026 |
| 4 | Insider transaction | Sep 11, 2026 | Sep 10, 2026 |
| 4 | Insider transaction | Sep 11, 2026 | Sep 10, 2026 |
| 144 | Notice of proposed sale | Sep 11, 2026 | — |
| 4 | Insider transaction | Sep 10, 2026 | Sep 8, 2026 |
| 144 | Notice of proposed sale | Sep 10, 2026 | — |
| 144 | Notice of proposed sale | Sep 10, 2026 | — |
| 144 | Notice of proposed sale | Sep 9, 2026 | — |
| 144 | Notice of proposed sale | Sep 8, 2026 | — |
| 4 | Insider transaction | Sep 3, 2026 | Sep 1, 2026 |
| 144 | Notice of proposed sale | Sep 2, 2026 | — |
| 144 | Notice of proposed sale | Sep 1, 2026 | — |
| 4 | Insider transaction | Aug 28, 2026 | Aug 26, 2026 |
| 144 | Notice of proposed sale | Aug 28, 2026 | — |
| 144 | Notice of proposed sale | Aug 26, 2026 | — |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 144 | Notice of proposed sale | Aug 18, 2026 | — |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 15, 2026 |
| 144 | Notice of proposed sale | Aug 17, 2026 | — |
| 144 | Notice of proposed sale | Aug 14, 2026 | — |
| 4 | Insider transaction | Aug 14, 2026 | Aug 13, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 2026 | — |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 4 | Insider transaction | Aug 12, 2026 | Aug 10, 2026 |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| 144 | Notice of proposed sale | Aug 10, 2026 | — |
| 4 | Insider transaction | Aug 7, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 6, 2026 |
| 4 | Insider transaction | Aug 7, 2026 | Aug 6, 2026 |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| 144 | Notice of proposed sale | Aug 6, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Aug 6, 2026 | — |
| 10-Q | Quarterly report | Aug 5, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations
|
Aug 5, 2026 | Aug 5, 2026 |
| 4 | Insider transaction | Jul 17, 2026 | Jul 15, 2026 |
| 144 | Notice of proposed sale | Jul 15, 2026 | — |
| 4 | Insider transaction | Jul 14, 2026 | Jul 10, 2026 |
| 144 | Notice of proposed sale | Jul 10, 2026 | — |
| 4 | Insider transaction | Jul 9, 2026 | Jul 7, 2026 |
| 4 | Insider transaction | Jul 9, 2026 | Jul 7, 2026 |
| 144 | Notice of proposed sale | Jul 7, 2026 | — |
| 144 | Notice of proposed sale | Jul 7, 2026 | — |
| 144 | Notice of proposed sale | Jul 7, 2026 | — |
| 4 | Insider transaction | Jul 2, 2026 | Jul 1, 2026 |
| 4 | Insider transaction | Jul 1, 2026 | Jun 29, 2026 |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jul 1, 2026 | — |
| 144 | Notice of proposed sale | Jun 29, 2026 | — |
| 4 | Insider transaction | Jun 18, 2026 | Jun 17, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 16, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 4 | Insider transaction | Jun 17, 2026 | Jun 15, 2026 |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 144 | Notice of proposed sale | Jun 17, 2026 | — |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 144 | Notice of proposed sale | Jun 16, 2026 | — |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 144 | Notice of proposed sale | Jun 15, 2026 | — |
| 144 | Notice of proposed sale | Jun 11, 2026 | — |
| 8-K |
Current report
Shareholder vote results
|
Jun 11, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 144 | Notice of proposed sale | Jun 10, 2026 | — |
| 144 | Notice of proposed sale | Jun 10, 2026 | — |
| 144 | Notice of proposed sale | Jun 9, 2026 | — |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 144 | Notice of proposed sale | Jun 3, 2026 | — |
| 144 | Notice of proposed sale | Jun 1, 2026 | — |
| 144 | Notice of proposed sale | Jun 1, 2026 | — |
| 144 | Notice of proposed sale | May 28, 2026 | — |
| 144 | Notice of proposed sale | May 27, 2026 | — |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 4 | Insider transaction | May 19, 2026 | May 15, 2026 |
| 144 | Notice of proposed sale | May 19, 2026 | — |
| 144 | Notice of proposed sale | May 18, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 14, 2026 | — |
| 8-K |
Current report
Results of operations
|
May 6, 2026 | May 6, 2026 |
| 10-Q | Quarterly report | May 6, 2026 | Mar 31, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 6, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| ARS | Annual report to shareholders | Apr 21, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 21, 2026 | — |
| DEF 14A | Proxy statement | Apr 21, 2026 | Jun 8, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Apr 20, 2026 | Apr 20, 2026 |
| 8-K |
Current report
Officer or director change
|
Apr 10, 2026 | Apr 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 8-K |
Current report
Results of operations
|
Feb 25, 2026 | Feb 25, 2026 |
| 10-K | Annual report | Feb 25, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 144 | Notice of proposed sale | Feb 18, 2026 | — |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 12, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 10, 2026 | — |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 12, 2026 | Jan 9, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Jan 5, 2026 | Jan 1, 2026 |
| 4 | Insider transaction | Dec 19, 2025 | Dec 17, 2025 |
| 144 | Notice of proposed sale | Dec 17, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 5, 2025 | — |
| 4 | Insider transaction | Nov 26, 2025 | Nov 24, 2025 |
| 144 | Notice of proposed sale | Nov 24, 2025 | — |
| 144 | Notice of proposed sale | Nov 21, 2025 | — |
| 4 | Insider transaction | Nov 21, 2025 | Nov 21, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 4 | Insider transaction | Nov 18, 2025 | Nov 15, 2025 |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| 144 | Notice of proposed sale | Nov 18, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 13, 2025 | — |
| 10-Q | Quarterly report | Nov 5, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations
|
Nov 5, 2025 | Nov 5, 2025 |
| 4 | Insider transaction | Oct 28, 2025 | Oct 24, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 6, 2025 | — |
| 4 | Insider transaction | Sep 19, 2025 | Sep 19, 2025 |
| 144 | Notice of proposed sale | Sep 19, 2025 | — |
| 4 | Insider transaction | Sep 19, 2025 | Sep 19, 2025 |
| 144 | Notice of proposed sale | Sep 19, 2025 | — |
| 4 | Insider transaction | Sep 17, 2025 | Sep 15, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 16, 2025 | Sep 16, 2025 |
| 144 | Notice of proposed sale | Sep 15, 2025 | — |
| 4 | Insider transaction | Sep 12, 2025 | Sep 10, 2025 |
| 4 | Insider transaction | Sep 10, 2025 | Sep 8, 2025 |
| 144 | Notice of proposed sale | Sep 9, 2025 | — |
| 144 | Notice of proposed sale | Sep 8, 2025 | — |
| 4 | Insider transaction | Sep 5, 2025 | Sep 4, 2025 |
| 8-K |
Current report
Material agreement
|
Sep 5, 2025 | Aug 31, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 3, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
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
- Services-Computer Programming, Data Processing, Etc. (SIC 7370)
- Listed as
- MGNI (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- New York, NY
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1595974
- Former names
- RUBICON PROJECT, INC. (until Jun 30, 2020)
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.