---
schema_version: "secwatch.filing_event.v1"
accession: "0001466593-21-000076"
form_type: "8-K"
ticker: "OTTR"
cik: "0001466593"
company_name: "Otter Tail Corp"
filed_at: "2021-12-01T23:59:59+00:00"
generated_at: "2026-06-28T04:26:32.304175+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Otter Tail Power issues $140M of senior notes; remaining $90M due May 2022

## Summary
- Issued $40M 2.74% Series 2021A notes due Nov 2031 and $100M 3.69% Series 2021B notes due Nov 2051.
- Proceeds will be used to refinance existing indebtedness.
- Remaining $90M Series 2022A notes at 3.77% due May 2052 expected to close in May 2022.
- Covenants limit interest-bearing debt to 60% of total capitalization and priority indebtedness to 20%.

## SEC filing metadata
- accession: 0001466593-21-000076
- form_type: 8-K
- ticker: OTTR
- cik: 0001466593
- company_name: Otter Tail Corp
- filed_at: 2021-12-01T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 2.03
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1466593/000146659321000076/0001466593-21-000076-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1466593/000146659321000076/ottr-20211129.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001466593-21-000076
- JSON: https://secwatch.observer/filing/0001466593-21-000076.json
- Plain text: https://secwatch.observer/filing/0001466593-21-000076.txt

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