[Form 4] KULICKE & SOFFA INDUSTRIES INC Insider Trading Activity

Rhea-AI Filing Summary

Kulicke & Soffa (KLIC) senior vice president Robert Nestor Chylak reported a Form 4 transaction. On October 11, 2025, 610 shares of common stock were withheld (Code F) at $38.18 to cover taxes tied to RSU vesting. Following this, he beneficially owns 20,228 shares directly.

The withholding related to the vesting of 2,139 RSUs, part of an RSU award of 6,417 shares granted on October 11, 2023. The withheld shares were not issued to or sold by the reporting person.

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

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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).

1. Name and Address of Reporting Person^*

Chylak Robert Nestor

(Last) (First) (Middle)

1005 VIRGINIA DRIVE

(Street)

FORT WASHINGTON PA 19034

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
KULICKE & SOFFA INDUSTRIES INC [ KLIC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Senior Vice President

3. Date of Earliest Transaction (Month/Day/Year)
10/11/2025

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	10/11/2025		F		610(1)	D	$38.18	20,228	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 withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 2,139 restricted stock units (RSUs) on October 11, 2025. This RSU vesting is in connection to an RSU award granted on October 11, 2023, of 6,417 shares. These shares that were withheld were not issued to or sold by the Reporting Person.

Remarks:

	Zi Yao Lim, Attorney-in-Fact for Robert Nestor Chylak	10/14/2025
	** 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 insider transaction did KLIC report on Form 4?

A tax withholding (Code F) of 610 shares at $38.18 on October 11, 2025 related to RSU vesting.

How many KLIC shares does the reporting person own after the transaction?

He beneficially owns 20,228 shares directly after the reported transaction.

Why were 610 KLIC shares withheld?

They were withheld by the issuer to satisfy tax withholding obligations upon RSU vesting.

How many RSUs vested for the KLIC executive?

2,139 RSUs vested on October 11, 2025.

What was the original KLIC RSU award size and grant date?

An RSU award of 6,417 shares was granted on October 11, 2023.

Was this a sale of KLIC shares by the executive?

No. The filing states the withheld shares were not issued to or sold by the reporting person.

What is the reporting person’s role at KLIC?

He is an Officer, serving as Senior Vice President.