Littelfuse, Inc.

Littelfuse, Inc.

LFUSยทNASDAQ

$484.65

+4.6%
TechnologyHardware, Equipment & Parts

Littelfuse, Inc. manufactures and sells circuit protection, power control, and sensing products in the Asia-Pacific, the Americas, and Europe. The company's Electronics segment offers fuses and fuse accessories, positive temperature coefficient resettable fuses, polymer electrostatic discharge suppressors, varistors, reed switch based magnetic sensing products, and gas discharge tubes; and discrete transient voltage suppressor (TVS) diodes, TVS diode arrays, protection and switching thyristors, metal-oxide-semiconductor field-effect transistors and diodes, and insulated gate bipolar transistors. This segment serves industrial motor drives and power conversion, automotive electronics, electric vehicle and related infrastructure, power supplies, data centers, telecommunications, medical devices, alternative energy, building and home automation, appliances, and mobile electronics markets. Its Transportation segment provides blade, resettable, and high-current and high-voltage fuses, as well as battery cable protectors for hybrid and electric vehicles; fuses, switches, relays, circuit breakers, and power distribution modules for the commercial vehicles; and sensor products. This segment serves original equipment manufacturers, Tier-I suppliers, and parts distributors in the passenger car, heavy duty truck, off-road vehicles, material handling, agricultural, construction, and other commercial vehicle end markets. The company's Industrial segment offers industrial fuses, protection relays, contactors, transformers, and temperature sensors for use in renewable energy and energy storage systems, electric vehicle infrastructure, HVAC systems, industrial safety, non-residential construction, MRO, mining, and industrial automation. It sells its products through distributors, direct sales force, and manufacturers' representatives. Littelfuse, Inc. was founded in 1927 and is headquartered in Chicago, Illinois.

At a Glance

Live Snapshot
Market Cap$12.26B
EPS-2.8900
P/E Ratio-167.70
Earnings Date07/29/2026

SEC Filings

LFUS - Filing history and reports

Filing TypeFiling DatePeriod EndingFiscal YearActions
8-K

8-K 2026

N/A

May 14, 2026
May 14, 2026
2026
10-Q

10-Q 2026 Q1

Q1

May 06, 2026
March 28, 2026
2026
8-K

8-K 2026

N/A

May 06, 2026
May 06, 2026
2026
8-K

8-K 2026

N/A

April 28, 2026
April 22, 2026
2026
8-K

8-K 2026

N/A

March 13, 2026
March 12, 2026
2026
DEF 14A

DEF 14A 2026

N/A

March 12, 2026
April 22, 2026
2026
8-K

8-K 2026

N/A

March 05, 2026
March 04, 2026
2026
10-K

10-K 2025 FY

FY

February 19, 2026
December 27, 2025
2025
8-K

8-K 2026

N/A

January 28, 2026
January 28, 2026
2026
8-K

8-K 2026

N/A

January 08, 2026
January 07, 2026
2026
Showing 1 to 10 of 402 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

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