---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-109812"
form_type: "8-K"
ticker: "CSQ"
cik: "0001275214"
company_name: "CALAMOS STRATEGIC TOTAL RETURN FUND"
filed_at: "2021-08-26T23:59:59+00:00"
generated_at: "2026-06-29T07:29:19.617392+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Calamos Strategic Total Return Fund amends charter and by-laws to clarify preferred securities provisions

## Summary
- Board of Trustees approved amended and restated Declaration of Trust and By-Laws effective August 23, 2021.
- Amendments clarify certain provisions related to preferred securities.
- Full texts of amendments filed as Exhibits 3.1 and 3.2 to the 8-K.

## SEC filing metadata
- accession: 0001104659-21-109812
- form_type: 8-K
- ticker: CSQ
- cik: 0001275214
- company_name: CALAMOS STRATEGIC TOTAL RETURN FUND
- filed_at: 2021-08-26T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1275214/000110465921109812/0001104659-21-109812-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1275214/000110465921109812/tm2122382d4_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-109812
- JSON: https://secwatch.observer/filing/0001104659-21-109812.json
- Plain text: https://secwatch.observer/filing/0001104659-21-109812.txt

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