---
schema_version: "secwatch.filing_event.v1"
accession: "0001466593-22-000035"
form_type: "8-K"
ticker: "OTTR"
cik: "0001466593"
company_name: "Otter Tail Corp"
filed_at: "2022-05-23T23:59:59+00:00"
generated_at: "2026-06-25T08:12:25.436315+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Otter Tail subsidiary closes $90M of 3.77% senior notes due 2052

## Summary
- OTP issued $90M Series 2022A Notes at 3.77% due May 20, 2052, completing a $230M private placement.
- Proceeds to refinance existing debt, fund capex, and for general corporate purposes.
- Series 2021A ($40M at 2.74% due 2031) and 2021B ($100M at 3.69% due 2051) were issued Nov 29, 2021.
- Note Purchase Agreement includes financial covenants: Interest-bearing Debt ≤60% of Total Capitalization, Priority Indebtedness ≤20%.

## SEC filing metadata
- accession: 0001466593-22-000035
- form_type: 8-K
- ticker: OTTR
- cik: 0001466593
- company_name: Otter Tail Corp
- filed_at: 2022-05-23T23:59:59+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/1466593/000146659322000035/0001466593-22-000035-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1466593/000146659322000035/ottr-20220520.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001466593-22-000035
- JSON: https://secwatch.observer/filing/0001466593-22-000035.json
- Plain text: https://secwatch.observer/filing/0001466593-22-000035.txt

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