LITTELFUSE INC
Ticker: LFUSTechnologyElectronic EquipmentThe business
Littelfuse, Inc. (NASDAQ: LFUS) is a diversified industrial technology manufacturing company founded in 1927 that designs, manufactures, and markets electronic components, modules, and integrated solutions for protection, power control, and sensing applications. The company operates through three reportable segments: Electronics, Transportation, and Industrial, generating total net sales of $2,386.3 million across these divisions. The Electronics segment, representing the largest revenue contributor at $1,345.5 million, offers fuses, resettable fuses, electromechanical switches, semiconductor products including MOSFETs and IGBTs, and various protection technologies. The Transportation segment generated $676.4 million in revenue through circuit protection and sensing technologies for automotive and commercial vehicle applications. The Industrial segment contributed $364.4 million through industrial fuses, protective relays, and control systems for grid infrastructure and energy storage applications.
Littelfuse maintains a robust global manufacturing footprint across more than twenty countries with approximately 17,000 employees distributed across the Americas (45%), Asia-Pacific (42%), and Europe (13%). The company's products are sold worldwide through distributors, direct sales forces, and manufacturers' representatives, with approximately 65% of net sales derived from customers outside the United States, including approximately 24% to China. The company serves over 4,000 customers and distributors globally, with Arrow Electronics representing its largest customer at 9.5% of consolidated net sales.
The company's competitive advantages include its broad, multi-technology product portfolio, extensive brand equity, scaled supplier position, and deep customer relationships embedded in research and development processes. Recent strategic acquisitions including Basler Electric, the Dortmund Fab, Western Automation, and C&K Switches have expanded the company's capabilities in high-growth markets including data centers, aerospace and defense, battery energy storage, and grid infrastructure. The company invests substantially in research and development, expending $106.9 million in fiscal 2025 to develop innovative solutions addressing customer needs in increasingly complex, higher-power applications. Additional information is available at http://investor.littelfuse.com.
- Sector
- Technology
- Industry
- Electronic Equipment
- HQ
- ROSEMONT, IL
- FY end
- 12-26
- CIK
- 889331
- SIC
- 3613
Ownership
Who holds LITTELFUSE INC — across funds, superinvestors and bonds · N-PORT 2026Q2 · 13F 2026-06-30
Top fund holders
| Fund | % of fund | Value |
|---|---|---|
| iShares Core S&P Mid-Cap ETF IJH · iShares Trust | 0.32% | $394.05M |
| VANGUARD TOTAL STOCK MARKET INDEX FUND VTI · VANGUARD INDEX FUNDS | 0.02% | $365.44M |
| VANGUARD SMALL-CAP INDEX FUND VB · VANGUARD INDEX FUNDS | 0.14% | $264.01M |
| VANGUARD INFORMATION TECHNOLOGY INDEX FUND VGT · VANGUARD WORLD FUND | 0.11% | $184.52M |
| VANGUARD SMALL-CAP GROWTH INDEX FUND VBK · VANGUARD INDEX FUNDS | 0.32% | $152.33M |
Superinvestors in LITTELFUSE INC
Share of each manager's reported 13F portfolio.
Fund ownership counts N-PORT filers only, so it is a floor rather than a census — pensions, insurers and direct holders are not visible here, and the remainder is not “held by individuals”.
Fund ownership is a subset of institutional 13F ownership — the two describe overlapping populations and must not be added together.
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