Kristina A. Cerniglia - 24 Feb 2026 Form 4 Insider Report for LITTELFUSE INC /DE (LFUS)

Role
Director
Signature
/s/Ryan K. Stafford, Power of Attorney
Issuer symbol
LFUS
Transactions as of
24 Feb 2026
Net transactions value
-$492,468
Form type
4
Filing time
25 Feb 2026, 16:47:32 UTC
Previous filing
08 Dec 2025
Next filing
09 Mar 2026

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Cerniglia Kristina A. Director 6133 NORTH RIVER ROAD, SUITE 500, ROSEMONT /s/Ryan K. Stafford, Power of Attorney 25 Feb 2026 0001614437

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction LFUS Common Stock Options Exercise $181,508 +911 +21% $199.24 5,166 24 Feb 2026 Direct
transaction LFUS Common Stock Options Exercise $189,139 +1,432 +28% $132.08 6,598 24 Feb 2026 Direct
transaction LFUS Common Stock Sale $863,114 -2,343 -36% $368.38 4,255 24 Feb 2026 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction LFUS Stock Option (right to buy) Options Exercise $0 -911 -100% $0.000000 0 24 Feb 2026 Common Stock 911 $199.24 Direct F2
transaction LFUS Stock Option (right to buy) Options Exercise $0 -1,432 -100% $0.000000 0 24 Feb 2026 Common Stock 1,432 $132.08 Direct F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

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).

Explanation of Responses:

Id Content
F1 This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 18, 2025.
F2 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.
F3 The option for 1,432 shares vested in increments of one third annually beginning on the first anniversary of the April 23, 2020 date of grant.