[Form 4] Littelfuse Inc Insider Trading Activity

Rhea-AI Filing Summary

Chung T J, a director of Littelfuse, Inc. (LFUS), reported two non-derivative acquisitions on 09/05/2025. The filing shows acquisition of 25 shares at $259.58 attributed to reinvestment of dividends under a deferred compensation plan, and acquisition of 3 shares at $259.58 representing dividends accrued on unvested restricted stock units. Following these transactions the report lists beneficial ownership totals of 18,755 and 18,758 shares respectively. The form indicates it was filed as a single reporting person and includes a checked box noting the transaction was made pursuant to a plan intended to satisfy Rule 10b5-1(c) affirmative defense. The filing is signed via power of attorney on 09/08/2025.

Positive

• Director reported acquisitions via dividend reinvestment and RSU dividends, showing continued alignment with company equity
• 10b5-1 plan box checked, indicating the transactions were intended to follow a pre-established trading plan

Negative

• None.

Insights

Securities/Insider Transactions Analyst

TL;DR: Insider acquired 28 shares via dividend reinvestment and RSU dividends; routine, small-scale insider activity consistent with plan-based purchases.

The reported purchases are non-derivative and small in size (25 and 3 shares) executed at $259.58 on 09/05/2025. One lot was from dividend reinvestment under a deferred compensation plan and the other from dividends on unvested RSUs, indicating these were automatic, plan-driven transactions rather than discretionary open-market buys. The filer checked the 10b5-1 plan box, which supports the characterization as pre-arranged, rule-compliant activity. Impact on ownership stake appears immaterial relative to the reported beneficial holdings of 18,755–18,758 shares.

Corporate Governance Specialist

TL;DR: Transactions reflect routine compensation-related share accruals and reinvestment; governance signals are neutral and compliant with disclosure rules.

The Form 4 shows the reporting person is a director and the acquisitions derive from dividend reinvestment and RSU dividend accruals, both disclosed explicitly. The use of a power of attorney signature and the 10b5-1 designation point to documented processes for insider trading compliance. There is no indication of discretionary insider trading or material change to control. For governance review, these entries are typical and present no immediate red flags.

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).

X

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)
09/05/2025

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	09/05/2025		A		25(1)	A	$259.58	18,755	D
Common Stock	09/05/2025		A		3(2)	A	$259.58	18,758	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

Explanation of Responses:

1. Represents shares acquired pursuant to reinvestment of dividends on shares held pursuant to a deferred compensation plan.

2. Represents shares accrued as payment of dividends on unvested restricted stock units.

	Ryan K. Stafford, Power of Attorney	09/08/2025
	** 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 transactions did Chung T J report on Form 4 for LFUS?

The Form 4 reports two non-derivative acquisitions on 09/05/2025: 25 shares (dividend reinvestment) and 3 shares (dividends on unvested RSUs), each at $259.58.

Do the Form 4 entries indicate discretionary insider trading for LFUS?

No. The filing indicates the transactions were made under a plan intended to satisfy Rule 10b5-1(c) and arose from dividend reinvestment and RSU dividend accruals, suggesting plan-based, not discretionary, activity.

What are the beneficial ownership totals reported after the transactions?

The report lists beneficial ownership of 18,755 shares after the 25-share acquisition and 18,758 shares after the 3-share acquisition.

When was the Form 4 signed or filed?

The signature on the filing was provided by a power of attorney, Ryan K. Stafford, dated 09/08/2025.