STOCK TITAN

Littelfuse (LFUS) SVP Chu exercises options and sells 11,397 shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Littelfuse SVP and CHRO Maggie Chu reported a same-day option exercise and sale in company stock. On May 20, 2026, she exercised stock options for a total of 11,397 shares of Common Stock at strike prices between $230.39 and $240.76 per share.

On the same date, she sold 11,397 shares of Common Stock in open-market transactions at weighted average prices between about $435.22 and $437.37 per share, with actual sale prices ranging from $435.00 to $437.72 according to the footnotes. The filing shows she continues to hold Common Stock directly after these transactions.

Positive

  • None.

Negative

  • None.
Insider Chu Maggie
Role SVP, CHRO
Sold 11,397 shs ($4.96M)
Type Security Shares Price Value
Exercise Common Stock 4,030 $231.64 $934K
Exercise Common Stock 4,283 $240.76 $1.03M
Exercise Common Stock 3,084 $230.39 $711K
Sale Common Stock 8,926 $435.22 $3.88M
Sale Common Stock 2,408 $436.38 $1.05M
Sale Common Stock 63 $437.37 $28K
Exercise Stock Option (right to buy) 3,084 $0.00 --
Exercise Stock Option (right to buy) 4,283 $0.00 --
Exercise Stock Option (right to buy) 4,030 $0.00 --
Holdings After Transaction: Common Stock — 10,031 shares (Direct, null); Stock Option (right to buy) — 1,542 shares (Direct, null)
Footnotes (1)
  1. The shares were sold in multiple transactions at prices ranging from $435.00 to $435.94, 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. The shares were sold in multiple transactions at prices ranging from $436.02 to $436.93, 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. The shares were sold in multiple transactions at prices ranging from $437.02 to $437.72, 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. The option for 4,030 shares vested in increments of one third annually beginning on the first anniversary of the April 28, 2022 date of grant. The option for 4,283 shares vested in increments of one third annually beginning on the first anniversary of the April 27, 2023 date of grant. The option for 4,626 shares vested in increments of one third annually beginning on the first anniversary of the April 25, 2024 date of grant.
Shares sold 11,397 shares Total Common Shares sold in open-market transactions on May 20, 2026
Shares exercised 11,397 shares Total Common Shares acquired via stock option exercises on May 20, 2026
Sale price (weighted avg 1) $435.22/share Weighted average price for one sale block of Common Stock
Sale price (weighted avg 2) $436.38/share Weighted average price for second sale block of Common Stock
Sale price (weighted avg 3) $437.37/share Weighted average price for third sale block of Common Stock
Option strike price $230.39/share Exercise price for one stock option grant into Common Stock
Option strike price $240.76/share Exercise price for another stock option grant into Common Stock
Option strike price $231.64/share Exercise price for third stock option grant into Common Stock
open-market sale financial
"transaction_action field describes the transactions as an open-market sale"
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
Stock Option (right to buy) financial
"security_title lists Stock Option (right to buy) as the derivative security"
weighted average sale price financial
"footnotes explain each amount represents the weighted average sale price"
derivative security financial
"transaction_code_description notes Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
vested in increments of one third annually financial
"footnotes state these options vested in increments of one third annually"
SEC Form 4
FORM 4UNITED 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).
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*
Chu Maggie

(Last)(First)(Middle)
6133 NORTH RIVER ROAD, SUITE 500

(Street)
ROSEMONT ILLINOIS 60018

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
LITTELFUSE INC /DE [ LFUS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
SVP, CHRO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
05/20/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Stock05/20/2026M4,030A$231.6410,031D
Common Stock05/20/2026M4,283A$240.7614,314D
Common Stock05/20/2026M3,084A$230.3917,398D
Common Stock05/20/2026S8,926D$435.22(1)8,472D
Common Stock05/20/2026S2,408D$436.38(2)6,064D
Common Stock05/20/2026S63D$437.37(3)6,001D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (right to buy)$231.6404/28/2022M4,030 (4)04/28/2029Common Stock4,030$00D
Stock Option (right to buy)$240.7604/27/2023M4,283 (5)04/27/2030Common Stock4,283$00D
Stock Option (right to buy)$230.3904/25/2024M3,084 (6)04/25/2031Common Stock3,084$01,542D
Explanation of Responses:
1. The shares were sold in multiple transactions at prices ranging from $435.00 to $435.94, 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 $436.02 to $436.93, 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 shares were sold in multiple transactions at prices ranging from $437.02 to $437.72, 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.
4. The option for 4,030 shares vested in increments of one third annually beginning on the first anniversary of the April 28, 2022 date of grant.
5. The option for 4,283 shares vested in increments of one third annually beginning on the first anniversary of the April 27, 2023 date of grant.
6. The option for 4,626 shares vested in increments of one third annually beginning on the first anniversary of the April 25, 2024 date of grant.
Remarks:
Exhibit 24 - Power of Attorney
/s/Anne-Marie D'Angelo, Power of Attorney05/21/2026
** Signature of Reporting PersonDate
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.
* Form 4: SEC 1474 (03-26)

FAQ

What did Littelfuse (LFUS) executive Maggie Chu report in this Form 4?

Maggie Chu, SVP and CHRO of Littelfuse, reported exercising stock options for 11,397 shares and selling 11,397 Common Shares on May 20, 2026. These were open-market transactions at weighted average prices in the mid-$430s per share, according to the filing.

How many Littelfuse (LFUS) shares did Maggie Chu sell and at what prices?

She sold 11,397 Littelfuse Common Shares in three open-market transactions. Weighted average sale prices were about $435.22, $436.38, and $437.37 per share, with individual trade prices ranging from $435.00 to $437.72, based on detailed footnote disclosures.

What stock options did Maggie Chu exercise in Littelfuse (LFUS)?

She exercised options to acquire 11,397 Littelfuse Common Shares. The options had exercise prices of $230.39, $240.76, and $231.64 per share, tied to grants from 2022, 2023, and 2024 that vested in one‑third annual increments after each grant’s first anniversary.

Is the Littelfuse (LFUS) Form 4 transaction a buy or sell by the insider?

The Form 4 reflects a mixed transaction: Maggie Chu acquired 11,397 shares through stock option exercises and disposed of 11,397 shares through open-market sales. Overall, it is an exercise-and-sell pattern rather than a straightforward open-market purchase or sale.

Does Maggie Chu still hold Littelfuse (LFUS) shares after these transactions?

Yes. The Form 4 tables report that Maggie Chu continues to hold Common Stock directly after the May 20, 2026 transactions. Individual line items show several thousand shares reported as beneficially owned following specific trades in the non-derivative ownership column.

Were the Littelfuse (LFUS) share sales by Maggie Chu a single trade or multiple trades?

They occurred as multiple trades. Footnotes state the 2026 sales were executed in numerous transactions within stated price ranges, and the reported prices are weighted averages. Detailed per-trade information is available upon request from the company, the SEC, or a security holder.