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Affiliated Managers Group, Inc. SEC filings

In the twelve months since 9 October 2025 Affiliated Managers Group, Inc. filed 17 documents with the SEC of the kinds listed here: 10 current reports (8-K), about 5 other events; 4 results of operations; 2 material agreement; 2 new financial obligation; 2 officer or director change; 3 quarterly reports (10-Q), 1 annual report to shareholders (ARS), 1 additional proxy material (DEFA14A), 1 proxy statement (DEF 14A), 1 annual report (10-K). The latest, filed 7 August 2026: 10-Q, quarterly report.

FiledFormWhat it was aboutPeriod or event dateFiling
7 August 202610-Qquarterly report30 June 2026EDGAR
30 July 20268-KResults of operations, Other events30 July 2026EDGAR
9 June 20268-KMaterial agreement, New financial obligation9 June 2026EDGAR
28 May 20268-KShareholder vote27 May 2026EDGAR
7 May 202610-Qquarterly report31 March 2026EDGAR
1 May 20268-KResults of operations, Other events1 May 2026EDGAR
17 April 2026ARSannual report to shareholders31 December 2025EDGAR
17 April 2026DEFA14Aadditional proxy materialEDGAR
17 April 2026DEF 14Aproxy statement27 May 2026EDGAR
26 February 20268-KOfficer or director change, Regulation FD disclosure22 February 2026EDGAR
17 February 202610-Kannual report31 December 2025EDGAR
12 February 20268-KResults of operations, Other events12 February 2026EDGAR
12 February 20268-KOfficer or director change10 February 2026EDGAR
11 December 20258-KMaterial agreement, New financial obligation8 December 2025EDGAR
8 December 20258-KOther events8 December 2025EDGAR
6 November 202510-Qquarterly report30 September 2025EDGAR
3 November 20258-KResults of operations, Other events3 November 2025EDGAR
An 8-K is what a company files within four business days of a material event; the SEC numbers the events, and the words here are the SEC's own headings, shortened.
Read moreForm 4, Form 144, 13F and Schedule 13D and 13G have their own pages. Prospectus supplements and correspondence are not listed.

Source

The company's filing index on EDGAR, read from the SEC's submissions feed.

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