---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-311380"
form_type: "8-K"
ticker: "AMG"
cik: "0001004434"
company_name: "AFFILIATED MANAGERS GROUP, INC."
filed_at: "2025-12-08T23:59:59+00:00"
generated_at: "2026-05-16T13:54:30.097967+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "medium"
source: SEC EDGAR
---

# AMG to redeem all outstanding 5.15% Convertible Trust Preferred Securities due 2037

## Summary
- Redemption notice sent Dec 8, 2025; redemption date is Dec 29, 2025.
- Redemption price: 100% of principal plus accrued unpaid interest to Dec 29.
- Proceeds from previously announced senior notes offering will fund redemption and settlement.
- Refinancing simplifies capital structure while maintaining long-duration debt profile.
- Redemption is not conditioned on consummation of the senior notes offering.

## SEC filing metadata
- accession: 0001193125-25-311380
- form_type: 8-K
- ticker: AMG
- cik: 0001004434
- company_name: AFFILIATED MANAGERS GROUP, INC.
- filed_at: 2025-12-08T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: medium
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1004434/000119312525311380/0001193125-25-311380-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1004434/000119312525311380/d93774d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-311380
- JSON: https://secwatch.observer/filing/0001193125-25-311380.json
- Plain text: https://secwatch.observer/filing/0001193125-25-311380.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.