[4] – Chylak Robert Nestor (CIK 0001887782)

Rhea-AI Filing Summary

Kulicke & Soffa (KLIC) officer reported equity award activity. On 10/13/2025, 7,982 common shares vested at $0. On 10/14/2025, 4,368 Performance Share Units converted into common at $0, and the company withheld 675 and 1,245 shares at $40.05 to satisfy taxes. After these transactions, the officer directly owned 30,658 shares.

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

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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)
10/13/2025

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	10/13/2025		A		7,982(1)	A	$0	28,210	D
Common Stock	10/14/2025		M		4,368(2)	A	$0	32,578	D
Common Stock	10/14/2025		F		675(3)	D	$40.05	31,903	D
Common Stock	10/14/2025		F		1,245(4)	D	$40.05	30,658	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
Performance Share Units	(2)	10/14/2025		M			4,368	(2)	(2)	Common Stock	4,368	$0	0	D

Explanation of Responses:

1. One-third of the shares granted vest on each anniversary of the date of grant.

2. Performance Share Units (PSUs) awarded October 14, 2022, achieved a 82% payout based on total shareholder return (TSR) relative to a peer group. The peer group consisted of the companies of the GICS 45301020 (Semiconductors) not including companies traded on the Pink Sheets LLC Exchange as of the beginning of the Performance Period with the relative TSR measured over a three-year period. The pay-out was certified, and shares issued on October 14, 2025. Each PSU is convertible to one share of common stock.

3. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 2,368 restricted stock units (RSUs) on October 14, 2025. This RSU vesting is in connection to an RSU award granted on October 14, 2022 of 7,104 shares. These shares that were withheld were not issued to or sold by the Reporting Person.

4. Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with issuance of 4,368 shares of common stock arising from payout under Performance Share Units (PSUs) awarded on October 14, 2022. The payment was certified, and the shares were issued on October 14, 2025, each PSU convertible into one share of common stock. 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	10/15/2025
	** 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 activity did KLIC disclose on this Form 4?

Vesting and settlement of equity awards: 7,982 common shares vested on 10/13/2025 and 4,368 PSUs converted to common on 10/14/2025.

How many KLIC shares does the reporting officer now own?

Direct ownership is 30,658 shares following the reported transactions.

Were any shares sold by the KLIC officer?

Shares marked F (675 and 1,245) were withheld by the issuer at $40.05 for taxes; they were not issued to or sold by the officer.

What was the PSU payout detail for KLIC?

PSUs awarded on 10/14/2022 achieved an 82% payout based on relative TSR; 4,368 shares were issued on 10/14/2025.

At what price were tax withholdings calculated?

Tax withholdings were recorded at $40.05 per share on 10/14/2025.

What is the reporting person’s role at KLIC?

The reporting person is an Officer, titled Senior Vice President.

What does the 'M' and 'F' transaction code mean here?

M indicates conversion/settlement of derivative (PSUs) into common; F indicates share withholding for taxes.