Were Maggie Chu’s Littelfuse (LFUS) share sales under a Rule 10b5-1 plan?

Yes. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on December 9, 2025. Such pre-arranged plans schedule trades in advance, helping separate routine diversification from discretionary market-timing decisions by insiders.

Littelfuse (LFUS) SVP Maggie Chu sells 1,097 shares under 10b5-1 plan

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

LITTELFUSE INC /DE senior vice president and chief human resources officer Maggie Chu reported open-market sales of company Common Stock. She sold a total of 1,097 shares across three transactions at prices around $392.47 and $396.90 per share.

After these sales, she directly holds 6,001 shares of Littelfuse Common Stock. The filing notes that the sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on December 9, 2025, indicating they were scheduled in advance rather than timed discretionarily.

Insider Trade Summary 10b5-1

Net Seller: 1,097 shares ($431,789)

Net Sell 3 txns

Insider Chu Maggie

Role SVP, CHRO

Sold 1,097 shs ($432K)

Type	Security	Shares	Price	Value
Sale	Common Stock	282	$396.90	$112K
Sale	Common Stock	317	$392.47	$124K
Sale	Common Stock	498	$392.47	$195K

Holdings After Transaction: Common Stock — 6,001 shares (Direct, null)

Footnotes (1)

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Key Figures

Total shares sold: 1,097 shares Price per share (April 30 sale): $396.90 per share Price per share (April 28 sales): $392.47 per share +2 more

5 metrics

Total shares sold 1,097 shares Aggregate of three open-market sales reported

Price per share (April 30 sale) $396.90 per share Sale of 282 shares of Common Stock

Price per share (April 28 sales) $392.47 per share Two sales totaling 815 shares of Common Stock

Shares held after transactions 6,001 shares Direct beneficial ownership following last reported sale

Form 4 sell transactions 3 sales All coded as open-market “S” transactions

Key Terms

Rule 10b5-1 trading plan, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

""security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

04/30/2026 - 06:43 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Chu Maggie

(Last)

(First)

(Middle)

6133 NORTH RIVER ROAD, SUITE 500

(Street)

ROSEMONT

ILLINOIS

60018

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
LITTELFUSE INC /DE [ LFUS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	SVP, CHRO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/28/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/28/2026		S⁽¹⁾		317	D	$392.47	6,781	D
Common Stock	04/28/2026		S⁽¹⁾		498	D	$392.47	6,283	D
Common Stock	04/30/2026		S⁽¹⁾		282	D	$396.9	6,001	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 9, 2025.

	/s/ Ryan K. Stafford, Power of Attorney	04/30/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did LFUS executive Maggie Chu report on this Form 4?

Maggie Chu reported selling a total of 1,097 shares of Littelfuse Common Stock in three open-market transactions. The reported sales took place at prices near $392.47 and $396.90 per share, reflecting routine portfolio activity rather than an acquisition of additional shares.

At what prices did Maggie Chu sell Littelfuse (LFUS) shares?

The reported Littelfuse share sales occurred at transaction prices of $392.47 and $396.90 per share. These prices applied to separate trades executed on different days, as disclosed in the Form 4, and all transactions involved Common Stock held directly by the reporting executive.

How many Littelfuse (LFUS) shares does Maggie Chu hold after the reported sales?

After the disclosed transactions, Maggie Chu directly holds 6,001 shares of Littelfuse Common Stock. This figure is reported in the Form 4 as the total number of shares beneficially owned following the last transaction, providing context for the relative size of the sales.

What type of transactions are reported for LFUS in this Form 4?

All reported transactions are open-market sales of Littelfuse Common Stock, coded as “S” on the Form 4. They are characterized as non-derivative transactions, meaning they involve direct share ownership rather than options, warrants, or other derivative securities.