Littelfuse (LFUS) officer exercises 2,049 options and sells shares on Dec. 11, 2025

Rhea-AI Filing Summary

Littelfuse Inc. disclosed insider stock transactions by an officer serving as SVP & GM Industrial Business. On December 11, 2025, the officer exercised a stock option covering 2,049 shares of common stock at an exercise price of $132.08 per share, converting the option into directly owned shares.

That same day, the officer sold 2,029 shares of Littelfuse common stock at a weighted average price of $270.02 per share and an additional 20 shares at $270.41 per share. After completing these transactions, the officer directly beneficially owned 10,175 shares of Littelfuse common stock.

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^*

Kim Peter Sung-Jip

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP & GM Industrial Business

3. Date of Earliest Transaction (Month/Day/Year)
12/11/2025

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	12/11/2025		M		2,049	A	$132.08	12,224	D
Common Stock	12/11/2025		S		2,029	D	$270.02(2)	10,195	D
Common Stock	12/11/2025		S		20	D	$270.41	10,175	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)	$132.08	12/11/2025		M			2,049	(1)	04/23/2027	Common Stock	2,049	$0	0	D

Explanation of Responses:

1. The option for 2,049 shares vested in increments of one third annually beginning on the first anniversary of the April 23, 2020 date of grant.

2. The shares were sold in multiple transactions at prices ranging from $269.37 to $270.36, 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	12/15/2025
	** 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

What insider stock transactions did Littelfuse (LFUS) report in this Form 4?

The filing reports that a Littelfuse officer serving as SVP & GM Industrial Business exercised a stock option for 2,049 shares of common stock at $132.08 per share and then sold portions of those shares on December 11, 2025.

What stock option did the Littelfuse (LFUS) officer exercise and how did it vest?

The officer exercised a stock option for 2,049 shares of Littelfuse common stock at an exercise price of $132.08. According to the explanation, this option vested in increments of one third annually, beginning on the first anniversary of the April 23, 2020 grant date.

How many Littelfuse (LFUS) shares were sold and at what prices?

On December 11, 2025, the officer sold 2,029 shares of Littelfuse common stock at a weighted average price of $270.02 per share, and an additional 20 shares at $270.41 per share.

How many Littelfuse (LFUS) shares does the officer own after these transactions?

Following the reported option exercise and share sales, the officer directly beneficially owned 10,175 shares of Littelfuse common stock.

How was the weighted average sale price for Littelfuse (LFUS) shares calculated?

The filing states that the $270.02 figure represents a weighted average sale price for shares sold in multiple transactions at prices ranging from $269.37 to $270.36 per share. The reporting person has undertaken to provide full details of each individual sale price upon request.

What happened to the Littelfuse (LFUS) stock option after it was exercised?

After the stock option with an exercise price of $132.08 was exercised for 2,049 shares of Littelfuse common stock on December 11, 2025, the derivative position was reduced to 0 options beneficially owned.