Otter Tail Corporation

Otter Tail Corporation

OTTRยทNASDAQ

$86.47

+0.82%
UtilitiesDiversified Utilities

Otter Tail Corporation, together with its subsidiaries, engages in electric utility, manufacturing, and plastic pipe businesses in the United States. The company's Electric segment produces, transmits, distributes, and sells electric energy in Minnesota, North Dakota, and South Dakota; and operates as a participant in the Midcontinent Independent System Operator, Inc. markets. This segment generates electricity through coal, wind and hydro, and natural gas. It serves approximately 133,000 residential, industrial, and other commercial customers. Its Manufacturing segment engages in the contract machining, metal parts stamping, fabrication and painting, and production of plastic thermoformed horticultural containers, life science and industrial packaging, and material handling components, and extruded raw material stock for recreational vehicle, agricultural, construction, lawn and garden, and industrial and energy equipment industries. It also manufactures clamshell packing, blister packs, returnable pallets, and handling trays for shipping and storing odd-shaped or difficult-to-handle parts for customers in the horticulture, medical and life sciences, industrial, recreation, and electronics industries. The company's Plastics segment manufactures polyvinyl chloride pipes for municipal water, rural water, wastewater, storm drainage and water reclamation system, and other uses. This segment markets its products to wholesalers and distributors through independent sales representatives, company salespersons, and customer service representatives. The company was formerly known as Otter Tail Power Company and changed its name to Otter Tail Corporation in 2001. Otter Tail Corporation was founded in 1907 and is headquartered in Fergus Falls, Minnesota.

At a Glance

Live Snapshot
Market Cap$3.63B
EPS6.5900
P/E Ratio13.12
Earnings Date08/03/2026

SEC Filings

OTTR - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
8-K

8-K 2026

N/A

May 29, 2026
May 28, 2026
2026
8-K

8-K 2026

N/A

May 15, 2026
May 15, 2026
2026
10-Q

10-Q 2026 Q1

Q1

May 06, 2026
March 31, 2026
2026
8-K

8-K 2026

N/A

May 05, 2026
May 04, 2026
2026
8-K

8-K 2026

N/A

April 15, 2026
April 13, 2026
2026
8-K

8-K 2026

N/A

April 14, 2026
April 13, 2026
2026
8-K

8-K 2026

N/A

March 23, 2026
March 19, 2026
2026
DEF 14A

DEF 14A 2026

N/A

March 02, 2026
April 13, 2026
2026
10-K/A

10-K/A 2025 FY (Amended)

FY

February 23, 2026
December 31, 2025
2025
10-K

10-K 2025 FY

FY

February 18, 2026
December 31, 2025
2025
Showing 1 to 10 of 260 filings

Understanding SEC Filings

Essential regulatory documents for investors

SEC filings are mandatory documents that publicly traded companies must submit to the Securities and Exchange Commission. These reports provide critical insights into a company's financial health, operations, risks, and strategic direction. For investors conducting due diligence, these filings are the most authoritative source of company information.

10-K

Annual Report

Comprehensive annual financial report filed within 60-90 days of fiscal year-end. Includes audited financial statements, management discussion & analysis (MD&A), risk factors, and detailed business operations. The most thorough financial disclosure of the year.

Filed annually
10-Q

Quarterly Report

Unaudited quarterly financial report filed within 40-45 days after each of the first three fiscal quarters. Provides updates on financial position, results of operations, and significant events. Essential for tracking quarterly performance trends.

Filed 3 times per year
8-K

Current Report

Event-driven filing for material events that shareholders should know about, filed within 4 business days. Includes acquisitions, executive changes, bankruptcy, earnings releases, and other significant developments. Critical for staying informed about breaking news.

Filed as events occur
DEF 14A

Proxy Statement

Definitive proxy statement sent to shareholders before annual meetings. Contains executive compensation details, board member information, voting matters, and corporate governance policies. Key for understanding management incentives and board composition.

Filed before shareholder meetings
S-1

Registration Statement

Initial registration for securities offerings, including IPOs. Provides detailed company history, business model, financial statements, risk factors, and use of proceeds. Essential for evaluating new investment opportunities and understanding company fundamentals.

Filed for new offerings
20-F

Foreign Annual Report

Annual report for foreign private issuers, equivalent to Form 10-K for non-U.S. companies. Filed within 4-6 months of fiscal year-end. Contains audited financials, business description, and regulatory disclosures adapted for international companies.

Foreign companies only

Why SEC Filings Matter

  • Regulatory Accuracy: Filings are subject to SEC review and legal penalties for misstatements, ensuring high data quality
  • Management Insights: MD&A sections reveal management's perspective on trends, challenges, and future outlook
  • Risk Assessment: Detailed risk factor disclosures help investors understand potential threats to business operations
  • Competitive Analysis: Business descriptions and segment data enable comparison with industry peers
  • Historical Context: Years of filings provide trend analysis and context for current performance