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

Reporting relationship: Director
Issuer ticker: LFUS
Reported as of: 24 Feb 2026
Net transaction value: -$492,468
SEC form: 4
Accepted by SEC: 25 Feb 2026, 16:47:32 UTC
Prior SEC filing: 08 Dec 2025
Next SEC filing: 09 Mar 2026
Source filing: View source filing
Reporting owner signature: /s/Ryan K. Stafford, Power of Attorney

Key filing fact

Kristina A. Cerniglia filed Form 4 for LITTELFUSE INC /DE (LFUS) on 25 Feb 2026.

Key facts

This page summarizes Kristina A. Cerniglia's Form 4 filing for LITTELFUSE INC /DE (LFUS).
5 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 25 Feb 2026, 16:47.

Change

Previous filing in this sequence was filed on 08 Dec 2025.
Current net transaction value: -$492,468.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001614437 Primary reporting owner

Cerniglia Kristina A.

Relationship: Director
Address: 6133 NORTH RIVER ROAD, SUITE 500, ROSEMONT
Signature: /s/Ryan K. Stafford, Power of Attorney
Signature date: 25 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

LFUS transaction

Common Stock

Options Exercise

Transaction value: $181,508
Shares: +911
Change %: +21%
Price: $199.24
Shares after: 5,166
Date: 24 Feb 2026
Ownership: Direct

LFUS transaction

Common Stock

Options Exercise

Transaction value: $189,139
Shares: +1,432
Change %: +28%
Price: $132.08
Shares after: 6,598
Date: 24 Feb 2026
Ownership: Direct

LFUS transaction

Common Stock

Sale

Transaction value: $863,114
Shares: -2,343
Change %: -36%
Price: $368.38
Shares after: 4,255
Date: 24 Feb 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

LFUS transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -911
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 24 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 911
Exercise price: $199.24
Footnotes: F2

LFUS transaction Derivative

Stock Option (right to buy)

Options Exercise

Transaction value: $0
Shares: -1,432
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 24 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,432
Exercise price: $132.08
Footnotes: F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote F1

This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 18, 2025.

Footnote 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.

Footnote 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.