What is the 13F Pro Quality Score for LFUS?

13F Pro ranks LITTELFUSE INC /DE (LFUS) on the 13F Pro Quality Score, a 0–100 composite of 32 fundamental signals including return on invested capital, free cash flow consistency, balance-sheet strength, earnings quality, growth durability, and valuation discipline. The score refreshes after each 10-K and 10-Q filing on SEC EDGAR. View LFUS's current score at https://13fpro.ai/research/LFUS (free sign-up required for the full ranking).

Where does 13F Pro source LFUS data?

All LITTELFUSE INC /DE fundamentals and ownership data come directly from SEC EDGAR. LITTELFUSE INC /DE files with the SEC under CIK 889331. 13F Pro ingests XBRL financial facts from 10-K and 10-Q filings, Form 13F-HR institutional holdings, and Form 4 insider transactions, with no third-party rewrites or estimates.

What sector is LFUS in?

LITTELFUSE INC /DE (LFUS) is classified in the Technology sector. 13F Pro publishes sector-level fund flow analysis and quality leaders at https://13fpro.ai/research/sector/technology.

How often is LFUS research updated on 13F Pro?

LFUS's fundamentals refresh within hours of each new 10-K or 10-Q filing on SEC EDGAR. Institutional ownership updates after each quarterly 13F filing window. Insider transactions update after each Form 4 filing. The 13F Pro Quality Score recalculates after every fundamentals refresh.

LITTELFUSE INC /DE(LFUS)Stock Analysis

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13F Pro Quality Score

58.7/100

Rank #966 of 2,879 stocksTOP 50%

View Technology peers →

Rankings refresh quarterly once 80% of peers have filed (~45 days after quarter-end). Next update: ~Aug 14, 2026.

Revenue Growth

38.8/100

Profitability

69.0/100

Balance Sheet

75.9/100

Earnings Quality

33.3/100

Free Cash Flow

69.1/100

Institutional Flow

23.0/100

Revenue Scale

65.9/100

Dilution Risk

53.8/100

LFUS Stock Analysis & AI Quality Score

AI stock analysis and institutional research for LITTELFUSE INC /DE (LFUS), a Technology sector company. 13F Pro's AI-powered ranking engine scores LFUS at 58.7/100 on a 32-signal composite quality model, placing it at rank #966 of 2,879 stocks — the top half of the AI-ranked universe. LFUS scores in the top quartile across balance sheet strength (75.9). Areas of concern include institutional flow (23.0) and earnings quality (33.3), which score below median versus the broader universe. Based on the latest XBRL financial filings (Q1 2026), LITTELFUSE INC /DE reports quarterly revenue of $657.0M, net income of $75.1M, free cash flow of $66.2M. Top institutional holders of LFUS by reported 13-F value include BlackRock,, VANGUARD PORTFOLIO MANAGEMENT, VANGUARD CAPITAL MANAGEMENT, based on the most recent SEC filings. LFUS trades on the Nasdaq exchange and files with the SEC under CIK 889331. 13F Pro's AI research platform runs 10 specialized AI analysts — value, growth, momentum, macro, and activist specialists — that debate LFUS daily and publish AI-generated analysis with cited SEC sources. The platform aggregates historical XBRL financial facts, 10-Q and 10-K filings, insider Form 4 transactions, and institutional 13-F holdings for LITTELFUSE INC /DE directly from SEC EDGAR. LITTELFUSE INC /DE's 13F Pro composite quality score has ranged between 8 and 59 since 2026, currently 58.7 — an improving long-term trajectory across 36 quarterly and live scoring snapshots.

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Fun facts about LITTELFUSE INC /DE

Quirks, history, and lore behind LFUS — the kind of stuff that makes a stock memorable.

1
The Basics
U.S. electronic components company · listed on Nasdaq · serves industries from automotive to industrial automation.
2
The Numbers
Annual revenue in the neighborhood of $2 billion, with a global workforce of roughly 15,000 employees spread across dozens of countries.
3
The History
Founded in 1927 in Chicago, the company spent nearly a century quietly becoming one of the world's leading makers of circuit protection devices.
4
The Secret
Its bread and butter is the humble fuse — those tiny components that sacrifice themselves so your expensive electronics don't have to.
5
The Lore
It has grown largely through acquisitions, snapping up dozens of companies to expand beyond fuses into sensors, semiconductors, and varistors — a circuit-protection empire built one buyout at a time.
6
The Giveaway
The name is practically a spoiler: this Chicago-born fuse specialist has "fuse" baked right into its corporate identity, and its ticker on Nasdaq is four letters starting with L.

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Revenue

Q1 2026

$657.0M

Net Income

Q1 2026

$75.1M

Free Cash Flow

Q1 2026

$66.2M

D/E Ratio

Q1 2026

0.29

Revenue & Net Income

Earnings Per Share

Key Financials Over Time

Export Financial Table · Pro+

Revenue

-7.3% YoY

$2.19BFY 2024

FY21 $2.08BFY22 $2.51BFY23 $2.36BFY24 $2.19B

Net Income

-61.4% YoY

$100.2MFY 2024

FY21 $283.8MFY22 $373.3MFY23 $259.5MFY24 $100.2M

Operating Income

-56.0% YoY

$158.8MFY 2024

FY21 $385.6MFY22 $500.8MFY23 $360.9MFY24 $158.8M

EPS (Diluted)

-61.3% YoY

$4.00FY 2024

FY21 $11.38FY22 $14.94FY23 $10.34FY24 $4.00

Total Assets

-2.6% YoY

$3.89BFY 2024

FY21 $3.15BFY22 $3.90BFY23 $4.00BFY24 $3.89B

Total Debt

+4.3% YoY

$923.7MFY 2024

FY21 $661.9MFY22 $1.14BFY23 $886.0MFY24 $923.7M

Op. Cash Flow

-19.6% YoY

$367.6MFY 2024

FY21 $373.3MFY22 $419.7MFY23 $457.4MFY24 $367.6M

Metric	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020	FY 2019
Revenue	$2.19B -7.3%	$2.36B -6.0%	$2.51B +20.9%	$2.08B +43.9%	$1.45B -3.9%	$1.50B
Net Income	$100.2M -61.4%	$259.5M -30.5%	$373.3M +31.5%	$283.8M +118.3%	$130.0M	—
Operating Income	$158.8M -56.0%	$360.9M -27.9%	$500.8M +29.9%	$385.6M +137.5%	$162.4M -15.8%	$192.8M
EPS (Diluted)	$4.00 -61.3%	$10.34 -30.8%	$14.94 +31.3%	$11.38 +115.1%	$5.29 -5.5%	$5.60
Total Assets	$3.89B -2.6%	$4.00B +2.3%	$3.90B +23.9%	$3.15B +14.7%	$2.75B +7.3%	$2.56B
Total Debt	$923.7M +4.3%	$886.0M -22.0%	$1.14B +71.7%	$661.9M -3.7%	$687.0M -0.3%	$689.2M
Operating Cash Flow	$367.6M -19.6%	$457.4M +9.0%	$419.7M +12.4%	$373.3M +44.7%	$258.0M +5.2%	$245.3M

AI Insight: LFUS Financial Trends

Q1 2026 revenue hit a table-high $657M and operating income reached $101M, but back-to-back Q4 write-downs mask underlying recovery momentum.

• Revenue grew from $558M in Q2 2024 to $657M in Q1 2026, a 17.7% rise over seven quarters.

• Operating income improved from $66M in Q2 2024 to $101M in Q1 2026, with Q4 impairment charges distorting both year-end periods.

• Total debt declined from $936M in Q3 2024 to $732M in Q1 2026, reducing leverage meaningfully.

• Net income swung to -$242M in Q4 2025 and -$52M in Q4 2024, signaling recurring year-end non-cash charges.

⚠ Q4 net losses of -$52M (2024) and -$242M (2025) suggest escalating impairment charges — magnitude nearly quintupled year-over-year.

⚠ Equity slipped to $2,426M after Q4 2025 losses despite a Q1 2026 partial recovery to $2,514M — trend worth monitoring.

⚠ Operating cash flow of $80M in Q1 2026 remains solid; sustaining this alongside rising debt service will be key.

AI Insight: LFUS Ratio Trends

LFUS Q1 2026 operating margins rebounded to 15.4% and ROIC hit 12.5%, but a massive Q4 2025 write-down drags the TTM picture deeply negative.

• Excluding one-off quarters, operating margin trended from 11.7% in Q2 2024 to 15.4% in Q1 2026, signaling underlying improvement.

• ROIC expanded from 7.7% in Q2 2024 to 12.5% in Q1 2026, with sequential gains in five of six non-impaired quarters.

• Leverage declined steadily: D/E fell from 0.38 in Q2 2024 to 0.29 in Q1 2026, the lowest level in the observed period.

• Q4 2025 operating margin collapsed to -37.5% and net margin to -40.8%, driving TTM ROE and ROA deeply negative at -1.6% and -1.0%.

⚠ Recurring Q4 impairment charges — Q4 2024 and Q4 2025 both produced severe losses — warrant scrutiny for structural write-down risk.

⚠ TTM metrics (OpMargin 2.8%, ROE -1.6%) remain severely distorted; confirmation that Q4 charges are non-recurring is critical.

⚠ D/E declining to 0.29 in Q1 2026 is a positive inflection; monitor whether balance sheet discipline holds through future impairment cycles.

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Available Research

13F Pro tracks comprehensive data for LITTELFUSE INC /DE including:

SEC EDGAR filings (10-K, 10-Q, 8-K)

XBRL financial facts (revenue, EPS, margins)

Insider transactions (Form 4)

Institutional 13F holdings

Quality rankings (32 signals)

AI analyst debates & daily meetings

Historical financial trends

Peer comparison & sector analysis

Top Institutional Holders of LFUS

BlackRock, Inc.
$797.1M2,349,035 sh
VANGUARD PORTFOLIO MANAGEMENT LLC
$531.8M1,567,077 sh
VANGUARD CAPITAL MANAGEMENT LLC
$382.2M1,126,270 sh
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.
$333.5M982,714 sh
STATE STREET CORP
$261.6M770,900 sh
Neuberger Berman Group LLC
$251.5M741,183 sh
MAIRS & POWER INC
$245.9M724,710 sh
DIMENSIONAL FUND ADVISORS LP
$170.6M502,809 sh
GEODE CAPITAL MANAGEMENT, LLC
$166.4M490,372 sh
WELLINGTON MANAGEMENT GROUP LLP
$162.0M477,529 sh

Fund	Value	Shares
BlackRock, Inc.	$797.1M	2,349,035
VANGUARD PORTFOLIO MANAGEMENT LLC	$531.8M	1,567,077
VANGUARD CAPITAL MANAGEMENT LLC	$382.2M	1,126,270
VAN LANSCHOT KEMPEN INVESTMENT MANAGEMENT N.V.	$333.5M	982,714
STATE STREET CORP	$261.6M	770,900
Neuberger Berman Group LLC	$251.5M	741,183
MAIRS & POWER INC	$245.9M	724,710
DIMENSIONAL FUND ADVISORS LP	$170.6M	502,809
GEODE CAPITAL MANAGEMENT, LLC	$166.4M	490,372
WELLINGTON MANAGEMENT GROUP LLP	$162.0M	477,529

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Is LFUS a good stock to buy?

13F Pro's AI-powered analysis of LITTELFUSE INC /DE (LFUS) draws on SEC EDGAR-sourced fundamentals, institutional 13F holdings, and insider Form 4 transactions in the Technology sector (listed on Nasdaq). The 32-signal AI Quality Score, current rank, and full bull/bear verdict for LFUS are available on the LFUS stock profile dashboard — with the same data, AI insights, ratios, and institutional activity refreshed after every 10-K, 10-Q, 13F, and Form 4 filing.

Which hedge funds own LFUS?

Institutional investors are required to disclose their holdings quarterly via SEC Form 13F. 13F Pro aggregates these filings to show which hedge funds, mutual funds, and asset managers are buying or selling LFUS. Combined with insider transaction data from Form 4 filings and AI-powered analysis from 10 specialized research agents, 13F Pro provides a comprehensive view of LITTELFUSE INC /DE's investment landscape.