Affiliated Managers Group, Inc. SEC filings AMG
Affiliated Managers Group, Inc. has 1,000 filings in SEC EDGAR's recent list, going back to May 7, 2013. Its latest annual report, Form ARS, was filed on Apr 17, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 7, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Jul 30, 2026 (results of operations, other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4/A | Primary document | Sep 25, 2026 | Aug 15, 2026 |
| N-PX | Filing | Aug 28, 2026 | Jun 30, 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 |
| 13F-NT | Filing | Aug 13, 2026 | Jun 30, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 12, 2026 | — |
| 10-Q | Quarterly report | Aug 7, 2026 | Jun 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 4 | Insider transaction | Aug 3, 2026 | Jul 30, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 30, 2026 | Jul 30, 2026 |
| 144 | Notice of proposed sale | Jun 30, 2026 | — |
| 3/A | Primary document | Jun 26, 2026 | Apr 15, 2026 |
| 4 | Insider transaction | Jun 15, 2026 | Jun 12, 2026 |
| 8-K |
Current report
Material agreement, New debt
|
Jun 9, 2026 | Jun 9, 2026 |
| 4 | Insider transaction | Jun 8, 2026 | Jun 8, 2026 |
| 144 | Notice of proposed sale | Jun 8, 2026 | — |
| 4 | Insider transaction | Jun 3, 2026 | Jun 1, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 28, 2026 | May 27, 2026 |
| 13F-NT | Filing | May 14, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 8, 2026 |
| 4 | Insider transaction | May 8, 2026 | May 6, 2026 |
| 144 | Notice of proposed sale | May 8, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 4 | Insider transaction | May 6, 2026 | May 6, 2026 |
| 144 | Notice of proposed sale | May 6, 2026 | — |
| 4 | Insider transaction | May 5, 2026 | May 1, 2026 |
| 8-K |
Current report
Results of operations, Other events
|
May 1, 2026 | May 1, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 28, 2026 | — |
| 3 | Initial insider ownership | Apr 24, 2026 | Apr 15, 2026 |
| ARS | Annual report to shareholders | Apr 17, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | Apr 17, 2026 | — |
| DEF 14A | Proxy statement | Apr 17, 2026 | May 27, 2026 |
| 3 | Initial insider ownership | Apr 6, 2026 | Apr 1, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 4 | Insider transaction | Mar 9, 2026 | Mar 5, 2026 |
| 144 | Notice of proposed sale | Mar 9, 2026 | — |
| 144 | Notice of proposed sale | Mar 9, 2026 | — |
| 144 | Notice of proposed sale | Mar 6, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 5, 2026 | — |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Feb 26, 2026 | Feb 22, 2026 |
| 10-K | Annual report | Feb 17, 2026 | Dec 31, 2025 |
| 13F-NT | Filing | Feb 13, 2026 | Dec 31, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 13, 2026 | — |
| 8-K |
Current report
Results of operations, Other events
|
Feb 12, 2026 | Feb 12, 2026 |
| 8-K |
Current report
Officer or director change
|
Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Dec 23, 2025 | Dec 23, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Dec 11, 2025 | Dec 8, 2025 |
| 424B5 | Prospectus supplement | Dec 10, 2025 | — |
| FWP | Free writing prospectus | Dec 8, 2025 | — |
| 8-K |
Current report
Other events
|
Dec 8, 2025 | Dec 8, 2025 |
| 424B5 | Prospectus supplement | Dec 8, 2025 | — |
| 4 | Insider transaction | Nov 28, 2025 | Nov 25, 2025 |
| 13F-NT | Filing | Nov 13, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Nov 12, 2025 | Nov 7, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 7, 2025 | — |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Nov 5, 2025 | Nov 3, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Nov 3, 2025 | Nov 3, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 30, 2025 | — |
| 3 | Initial insider ownership | Oct 3, 2025 | Sep 30, 2025 |
| 4 | Insider transaction | Sep 9, 2025 | Sep 8, 2025 |
| 144 | Notice of proposed sale | Sep 9, 2025 | — |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| 4 | Insider transaction | Sep 4, 2025 | Sep 2, 2025 |
| N-PX | Filing | Aug 29, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 14, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 14, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 14, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 18, 2025 | Aug 15, 2025 |
| 4 | Insider transaction | Aug 14, 2025 | Aug 12, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Aug 14, 2025 | Aug 11, 2025 |
| 13F-NT | Filing | Aug 13, 2025 | Jun 30, 2025 |
| 10-Q | Quarterly report | Aug 7, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Aug 4, 2025 | Jul 31, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 31, 2025 | Jul 31, 2025 |
| 4 | Insider transaction | Jul 3, 2025 | Jul 1, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jun 6, 2025 | Jun 3, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Jun 6, 2025 | — |
| 8-K |
Current report
Shareholder vote results
|
May 22, 2025 | May 22, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 14, 2025 | — |
| 4 | Insider transaction | May 13, 2025 | May 9, 2025 |
| 4 | Insider transaction | May 13, 2025 | May 12, 2025 |
| 4 | Insider transaction | May 13, 2025 | May 12, 2025 |
| 13F-NT | Filing | May 13, 2025 | Mar 31, 2025 |
| 10-Q | Quarterly report | May 8, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
May 8, 2025 | May 8, 2025 |
| ARS | Annual report to shareholders | Apr 11, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 11, 2025 | — |
| DEF 14A | Proxy statement | Apr 11, 2025 | May 22, 2025 |
| 144 | Notice of proposed sale | Mar 10, 2025 | — |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 4 | Insider transaction | Mar 7, 2025 | Mar 5, 2025 |
| 8-K |
Current report
Other events
|
Mar 7, 2025 | Mar 7, 2025 |
| 424B5 | Prospectus supplement | Mar 7, 2025 | — |
| S-3ASR | Automatic shelf registration | Feb 28, 2025 | — |
| 10-K | Annual report | Feb 14, 2025 | Dec 31, 2024 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 13F-NT | Filing | Feb 13, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 4 | Insider transaction | Feb 10, 2025 | Feb 6, 2025 |
| 8-K |
Current report
Results of operations, Other events
|
Feb 6, 2025 | Feb 6, 2025 |
| 8-K |
Current report
Officer or director change
|
Feb 3, 2025 | Jan 30, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 4 | Insider transaction | Jan 3, 2025 | Jan 1, 2025 |
| 8-K |
Current report
Material agreement, New debt
|
Nov 15, 2024 | Nov 15, 2024 |
| 13F-NT | Filing | Nov 13, 2024 | Sep 30, 2024 |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 6, 2024 | — |
| 8-K |
Current report
Results of operations, Other events
|
Nov 4, 2024 | Nov 4, 2024 |
| 4 | Insider transaction | Oct 18, 2024 | Oct 16, 2024 |
| 4 | Insider transaction | Oct 8, 2024 | Oct 4, 2024 |
| 4 | Insider transaction | Oct 4, 2024 | Oct 2, 2024 |
| N-PX | Filing | Aug 30, 2024 | Jun 30, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 19, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 16, 2024 |
| 4 | Insider transaction | Aug 20, 2024 | Aug 16, 2024 |
| 8-K |
Current report
Material agreement, New debt
|
Aug 20, 2024 | Aug 15, 2024 |
| 144 | Notice of proposed sale | Aug 19, 2024 | — |
| 144 | Notice of proposed sale | Aug 16, 2024 | — |
| 424B5 | Prospectus supplement | Aug 16, 2024 | — |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 4 | Insider transaction | Aug 16, 2024 | Aug 15, 2024 |
| 144 | Notice of proposed sale | Aug 16, 2024 | — |
| FWP | Free writing prospectus | Aug 16, 2024 | — |
| 424B5 | Prospectus supplement | Aug 15, 2024 | — |
| 13F-NT | Filing | Aug 13, 2024 | Jun 30, 2024 |
| 10-Q | Quarterly report | Aug 2, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Officer or director change
|
Aug 2, 2024 | Aug 2, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 4 | Insider transaction | Jul 31, 2024 | Jul 29, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 29, 2024 | Jul 29, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 7, 2024 | — |
| 3 | Initial insider ownership | May 24, 2024 | May 22, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 24, 2024 | May 22, 2024 |
| 13F-NT | Filing | May 14, 2024 | Mar 31, 2024 |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations, Other events
|
May 6, 2024 | May 6, 2024 |
| ARS | Annual report to shareholders | Apr 12, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 12, 2024 | — |
| DEF 14A | Proxy statement | Apr 12, 2024 | May 22, 2024 |
| 3 | Initial insider ownership | Apr 5, 2024 | Apr 1, 2024 |
| 3 | Initial insider ownership | Apr 5, 2024 | Apr 1, 2024 |
| 4 | Insider transaction | Mar 28, 2024 | Mar 28, 2024 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Mar 25, 2024 | Mar 22, 2024 |
| CERT | Nyse certification | Mar 22, 2024 | — |
| 8-A12B | Filing | Mar 20, 2024 | — |
| 8-K |
Current report
Material agreement, New debt
|
Mar 20, 2024 | Mar 14, 2024 |
| 424B5 | Prospectus supplement | Mar 15, 2024 | — |
| FWP | Free writing prospectus | Mar 15, 2024 | — |
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Company profile
- Industry
- Investment Advice (SIC 6282)
- Listed as
- AMG (NYSE), MGR (NYSE), MGRB (NYSE), MGRD (NYSE), MGRE (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- DE
- Headquarters
- Jupiter, FL
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1004434
- Former names
- AFFILIATED MANAGERS GROUP INC (until Sep 20, 2013)
Other Investment Advice companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.