Littelfuse (LFUS) director sells 5,000 shares around $347 after exercise

Rhea-AI Filing Summary

Littelfuse Inc. director Anthony Grillo reported an option exercise and related share sales. On February 10, 2026, he exercised a stock option for 911 shares of common stock at an exercise price of $199.24 per share.

That same day, he sold a total of 5,000 common shares in open-market transactions, including 4,570 shares at a weighted average price of $346.13 and 390 shares at a weighted average price of $347.35, plus 40 shares at $348.47. After these transactions, he directly owned 70,334 Littelfuse common shares.

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^*

GRILLO ANTHONY

(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)
02/10/2026

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	02/10/2026		S		4,570	D	$346.13(1)	69,853	D
Common Stock	02/10/2026		S		390	D	$347.35(2)	69,463	D
Common Stock	02/10/2026		S		40	D	$348.47	69,423	D
Common Stock	02/10/2026		M		911	A	$199.24	70,334	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	02/10/2026		M			911	(3)	04/26/2026	Common Stock	911	$0	0	D

Explanation of Responses:

1. The shares were sold in multiple transactions at prices ranging from $346.00 to $346.80, 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.

2. The shares were sold in multiple transactions at prices ranging from $347.27 to $347.40, 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.

3. 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.

Remarks:

	/s/Ryan K. Stafford, Power of Attorney	02/11/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did Littelfuse (LFUS) report for director Anthony Grillo?

Director Anthony Grillo exercised options and sold shares. On February 10, 2026, he exercised 911 stock options at $199.24 per share and sold 5,000 Littelfuse common shares in several open-market trades at prices in the mid-$340 range.

How many Littelfuse (LFUS) shares did the director sell and at what prices?

The director sold 5,000 Littelfuse shares. He sold 4,570 shares at a weighted average price of $346.13, 390 shares at a weighted average price of $347.35, and 40 shares at $348.47, all in open-market transactions on February 10, 2026.

What stock option activity did Littelfuse (LFUS) disclose for its director?

The filing shows a stock option exercise for 911 shares. On February 10, 2026, Anthony Grillo exercised an option to buy 911 Littelfuse common shares at an exercise price of $199.24 per share, fully using that option grant.

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

Anthony Grillo now directly owns 70,334 shares. Following the February 10, 2026 option exercise for 911 shares and the sale of 5,000 common shares, his directly held Littelfuse common stock position stands at 70,334 shares.

Were the Littelfuse (LFUS) share sales executed in multiple trades?

Yes, the reported sales occurred in multiple trades. The 4,570-share sale used prices from $346.00 to $346.80, and the 390-share sale used prices from $347.27 to $347.40, with weighted average prices disclosed and detailed trade breakdowns available upon request.

When did the exercised Littelfuse (LFUS) stock option originally vest?

The 911-share option vested over three years. According to the disclosure, this option vested in one-third increments each year, beginning on the first anniversary of the April 26, 2019 grant date, before being exercised on February 10, 2026.