Otter Tail Corp

For the period ended Sep 30, 2025. Filed Nov 5, 2025.

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, 2025 · Filed Nov 5, 2025

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

Extracted filing text, with the paragraph anchors used by the comparison.

See the whole filing, with its images and exhibits

Definitions

The following abbreviations or acronyms are used in the text.

ARO	Asset Retirement Obligation	OTC	Otter Tail Corporation
ARP	Alternative Revenue Program	OTP	Otter Tail Power Company
ASC	Accounting Standards Codification	PIR	Phase-In Rider
ECO	Energy Conservation and Optimization Rider	PSLRA	Private Securities Litigation Reform Act of 1995
EPA	Environmental Protection Agency	PTC	Production Tax Credits
ESSRP	Executive Survivor and Supplemental Retirement Plan	PVC	Polyvinyl chloride
EUIC	Electric Utility Infrastructure Costs Rider	RHR	Regional Haze Rule
FASB	Financial Accounting Standards Board	ROE	Return on equity
FERC	Federal Energy Regulatory Commission	RRR	Renewable Resource Rider
GHG	Greenhouse Gas	RTO	Regional Transmission Organizations
kwh	kilowatt-hour	SDPUC	South Dakota Public Utilities Commission
MATs	Mercury and Air Toxics Standards	SEC	Securities and Exchange Commission
MDT	Metering & Distribution Technology Rider	SIP	State Implementation Plan
Merricourt	Merricourt Wind Energy Center	SOFR	Secured Overnight Financing Rate
MISO	Midcontinent Independent System Operator, Inc.	TCR	Transmission Cost Recovery Rider
MPUC	Minnesota Public Utilities Commission	VinylTech	VinylTech Corporation
OBBBA	One Big Beautiful Bill Act

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.