---
schema_version: "secwatch.filing_event.v1"
accession: "0001466593-26-000063"
form_type: "8-K"
ticker: "OTTR"
cik: "0001466593"
company_name: "Otter Tail Corp"
filed_at: "2026-06-18T12:02:31+00:00"
generated_at: "2026-06-18T12:05:05.716817+00:00"
event_type: "litigation"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Otter Tail settles PVC pipe antitrust class action for $30M with End-User Class

## Summary
- Otter Tail subsidiaries to pay $30M to settle End-User Class claims in PVC Pipe Antitrust Litigation.
- Settlement subject to court preliminary and final approval; payment due ~21 days after preliminary approval.
- Company does not admit wrongdoing; settlement reduces uncertainty and costs of protracted litigation.
- Settlement expected to be funded from available cash; not expected to materially affect financial position.
- If settlement not finalized, company will continue defending with strong defenses.

## SEC filing metadata
- accession: 0001466593-26-000063
- form_type: 8-K
- ticker: OTTR
- cik: 0001466593
- company_name: Otter Tail Corp
- filed_at: 2026-06-18T12:02:31+00:00
- event_type: litigation
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 1.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1466593/000146659326000063/0001466593-26-000063-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1466593/000146659326000063/ottr-20260617.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001466593-26-000063
- JSON: https://secwatch.observer/filing/0001466593-26-000063.json
- Plain text: https://secwatch.observer/filing/0001466593-26-000063.txt

## Key facts
- Material Agreements
  Otter Tail Corp entered into Settlement Agreement with the EUPs individually and on behalf of the putative EUP class members valued at $30 million (effective 2026-06-17).
  - Action: entry
  - Agreement: settlement
  - Counterparty: the EUPs individually and on behalf of the putative EUP class members
  - Value: $30 million
  - Effective: 2026-06-17
  source text: On June 17, 2026, the Company entered into a settlement agreement with the EUPs individually and on behalf of the putative EUP class members (the “Settlement Agreement”). Subject to the satisfaction of certain conditions, including preliminary and final approval by the Court, the Company’s subsidiaries, Northern Pipe Products, Inc. and Vinyltech Corporation, have agreed to pay an aggregate of $30 million into a settlement fund
  evidence_url: https://www.sec.gov/Archives/edgar/data/1466593/000146659326000063/0001466593-26-000063-index.htm

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