---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-109808"
form_type: "8-K"
ticker: "CHI"
cik: "0001171471"
company_name: "CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND"
filed_at: "2021-08-26T23:59:59+00:00"
generated_at: "2026-06-29T07:28:56.893103+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "low"
source: SEC EDGAR
---

# Calamos Convertible Opportunities and Income Fund amends governing documents to clarify preferred securities provisions

## Summary
- Board of Trustees amended Declaration of Trust and Bylaws, effective August 23, 2021.
- Amendments clarify provisions relating to preferred securities.
- No changes to fiscal year or other significant governance matters.

## SEC filing metadata
- accession: 0001104659-21-109808
- form_type: 8-K
- ticker: CHI
- cik: 0001171471
- company_name: CALAMOS CONVERTIBLE OPPORTUNITIES & INCOME FUND
- filed_at: 2021-08-26T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: low
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1171471/000110465921109808/0001104659-21-109808-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1171471/000110465921109808/tm2122382d2_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-109808
- JSON: https://secwatch.observer/filing/0001104659-21-109808.json
- Plain text: https://secwatch.observer/filing/0001104659-21-109808.txt

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