Littelfuse (LFUS) director Noglows exercises 911-share stock option, updates holdings

Rhea-AI Filing Summary

Littelfuse director William P. Noglows reported an option exercise and updated share holdings. On February 4, 2026, a stock option for 911 shares of Littelfuse common stock was exercised at an exercise price of $199.24 per share, converting the option into common shares.

Following this transaction, Noglows beneficially owns 21,685 shares of Littelfuse common stock directly. In addition, 2,500 shares are held in a trust for the benefit of his son and another 2,500 shares are held in a trust for the benefit of his daughter, reported as indirect ownership. The option position for 911 shares is now shown as fully exercised with no remaining derivative securities of that grant.

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^*

NOGLOWS WILLIAM P

(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)
02/04/2026

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	02/04/2026		M		911	A	$199.24	21,685	D
Common Stock								2,500	I	By Trust(1)
Common Stock								2,500	I	By Trust(2)

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	02/04/2026		M			911	(3)	04/26/2026	Common Stock	911	$0	0	D

Explanation of Responses:

1. Shares held in trust for the benefit of the reporting person's son.

2. Shares held in trust for the benefit of the reporting person's daughter.

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	02/06/2026
	** 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.

FAQ

What insider transaction did LFUS director William P. Noglows report?

William P. Noglows reported exercising a stock option for 911 Littelfuse common shares at an exercise price of $199.24 per share. This converted his derivative position into direct common stock ownership and eliminated that particular option grant.

How many Littelfuse (LFUS) shares does William P. Noglows own after this Form 4?

After the reported transaction, William P. Noglows beneficially owns 21,685 Littelfuse common shares directly. He also reports indirect ownership of 2,500 shares in a trust for his son and 2,500 shares in a trust for his daughter.

What does the transaction code M mean in the LFUS Form 4 filing?

Transaction code M indicates an exercise or conversion of a derivative security, such as a stock option, into common shares. In this case, a stock option for 911 Littelfuse shares was exercised into 911 shares of common stock at a $199.24 exercise price.

How are the trust-held Littelfuse (LFUS) shares reported in this Form 4?

The filing shows 2,500 Littelfuse shares held in a trust for the benefit of the reporting person’s son and 2,500 shares in a trust for his daughter. These positions are reported as indirect beneficial ownership, separate from his directly held 21,685 shares.

What happened to William P. Noglows’ Littelfuse stock option after the exercise?

The stock option for 911 Littelfuse shares, granted April 26, 2019 and vesting in one‑third annual increments, has been fully exercised. The Form 4 shows zero derivative securities remaining from that specific option grant following the February 4, 2026 transaction.