Otter Tail Corp

For the period ended Sep 30, 2026. Filed Nov 4, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 4, 2026

OTTR$79.86+1.8%Stored close · as of Nov 9, 2026

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Definitions

The following abbreviations or acronyms are used in the text.

AFUDC	Allowance for Funds Used During Construction	MISO	Midcontinent Independent System Operator, Inc.
ARO	Asset Retirement Obligation	MPUC	Minnesota Public Utilities Commission
ARP	Alternative Revenue Program	NCPC	Non-Converter Seller Purchaser Class
ASC	Accounting Standards Codification	OPIS	Oil Price Information Systems, LLC.
DOJ	U.S. Department of Justice	OTC	Otter Tail Corporation
DPP	Direct Purchaser Class	OTP	Otter Tail Power Company
ECO	Energy Conservation and Optimization Rider	PIR	Phase-In Rider
EPA	Environmental Protection Agency	PSLRA	Private Securities Litigation Reform Act of 1995
ESSRP	Executive Survivor and Supplemental Retirement Plan	PTC	Production Tax Credits
EUIC	Electric Utility Infrastructure Costs Rider	PVC	Polyvinyl chloride
EUP	End-User Class	ROE	Return on equity
FASB	Financial Accounting Standards Board	RHR	Regional Haze Rule
FERC	Federal Energy Regulatory Commission	RRR	Renewable Resource Rider
FTR	Financial Transmission Right	RTO	Regional Transmission Organizations
GHG	Greenhouse Gas	SDPUC	South Dakota Public Utilities Commission
IRP	Integrated Resource Plan	SEC	Securities and Exchange Commission
kwh	kilowatt-hour	SIP	State Implementation Plan
MDT	Metering & Distribution Technology Rider	TCR	Transmission Cost Recovery Rider
Merricourt	Merricourt Wind Energy Center

ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.