[Form 4] Littelfuse Inc Insider Trading Activity

Rhea-AI Filing Summary

Chung T.J., a director of Littelfuse Inc. (LFUS), reported transactions on Form 4 dated 08/11/2025. The filing shows two stock options (for 911 and 1,432 shares) were exercised on that date with conversion/exercise prices shown as $199.24 and $132.08, resulting in acquisition of 2,343 common shares.

The filing also reports sales of 679 and 1,664 shares on 08/11/2025 at weighted average prices of $245.24 and $246.46 (price ranges disclosed). Following these transactions the reporting person beneficially owned 18,730 shares and is shown as holding 0 derivative securities. Explanations note the options' vesting schedules.

Insights

Financial Analyst

TL;DR: Insider exercised 2,343 options and sold 2,343 shares on 08/11/2025; final beneficial ownership is 18,730 shares.

The Form 4 documents the exercise of two option grants (911 and 1,432 shares) with exercise prices of $199.24 and $132.08, and contemporaneous sales of the same total number of shares at weighted average prices of $245.24 and $246.46. Derivative holdings are reported as 0 after these transactions. From an equity-impact perspective, the report shows execution of vested compensation and offsetting sales on the same date, which typically has limited standalone market impact absent larger context.

Corporate Governance Expert

TL;DR: Director disclosed exercised options, sales, and vesting details; filing appears compliant and includes price ranges and PoA signature.

The filing includes explanatory notes on vesting (one-third annually from the stated grant dates), weighted-average sale prices and price ranges for multiple transactions, and is signed via power of attorney. These elements align with standard disclosure practices for Section 16 filings and provide the issuer and regulators the requested transactional detail.

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

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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^*

CHUNG T J

(Last) (First) (Middle)

6133 NORTH RIVER ROAD, SUITE 500

(Street)

ROSEMONT IL 60018

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2025

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/11/2025		M		911	A	$199.24	19,641	D
Common Stock	08/11/2025		M		1,432	A	$132.08	21,073	D
Common Stock	08/11/2025		S		679	D	$245.24(3)	20,394	D
Common Stock	08/11/2025		S		1,664	D	$246.46(4)	18,730	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$199.24	08/11/2025		M			911	(1)	04/26/2026	Common Stock	911	$0	0	D
Stock Option (right to buy)	$132.08	08/11/2025		M			1,432	(2)	04/23/2027	Common Stock	1,432	$0	0	D

Explanation of Responses:

1. The option for 911 shares vested in increments of one third annually beginning on the first anniversary of the April 26, 2019 date of grant.

2. The option for 1432 shares vested in increments of one third annually beginning on the first anniversary of the April 23, 2020 date of grant.

3. The shares were sold in multiple transactions at prices ranging from $244.55 to $245.54, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

4. The shares were sold in multiple transactions at prices ranging from $245.58 to $246.46, inclusive. This amount represents the weighted average sale price of such transactions. The reporting person undertakes to provide full information regarding the number of shares sold at each separate price upon request of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer.

	Ryan K. Stafford, Power of Attorney	08/13/2025
	** 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.

FAQ

Who filed the Form 4 for LFUS?

The Form 4 was filed by Chung T.J., identified as a Director of Littelfuse Inc.

What transactions did Chung T.J. report on 08/11/2025 for LFUS?

The filing reports exercises of options for 911 and 1,432 shares (total 2,343 acquired) and sales of 679 and 1,664 shares (total 2,343 sold) on 08/11/2025.

At what prices were the LFUS shares exercised and sold?

Exercise/conversion prices are shown as $199.24 and $132.08. Weighted average sale prices are reported as $245.24 and $246.46, with ranges disclosed in the filing.

How many LFUS shares does the reporting person own after the transactions?

After the reported transactions the reporting person beneficially owned 18,730 shares.

Are any derivative securities reported after these transactions?

The Form 4 shows 0 derivative securities beneficially owned following the reported transactions.

Does the filing include vesting or other explanatory details?

Yes. The filing explains vesting schedules for the options (one-third annually beginning on the first anniversary of the grant dates) and provides sale price ranges and weighted averages.