Robert Nestor Chylak - 20 Nov 2025 Form 4 Insider Report for KULICKE & SOFFA INDUSTRIES INC (KLIC)

Role: Senior Vice President
Signature: Zi Yao Lim, Attorney-in-Fact for Robert Nestor Chylak
Issuer symbol: KLIC
Transactions as of: 20 Nov 2025
Net transactions value: -$1,600
Form type: 4
Filing time: 24 Nov 2025, 19:03:05 UTC
Previous filing: 17 Oct 2025
Next filing: 11 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Chylak Robert Nestor	Senior Vice President	1005 VIRGINIA DRIVE, FORT WASHINGTON	Zi Yao Lim, Attorney-in-Fact for Robert Nestor Chylak	24 Nov 2025	0001887782

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	KLIC	Common Stock	Options Exercise	$0	+142	+0.47%	$0.000000	30,126	20 Nov 2025	Direct	F1
transaction	KLIC	Common Stock	Tax liability	$1,600	-41	-0.14%	$39.03	30,085	20 Nov 2025	Direct	F2

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	KLIC	Performance Share Units	Options Exercise	$0	-142	-100%	$0.000000	0	20 Nov 2025	Common Stock	142		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.
F2	Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with issuance of 142 shares of common stock arising from payout under Performance Share Units (PSUs) awarded on awarded October 14, 2022. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock. These shares were not issued to or sold by the Reporting Person.

Content

Performance Share Units (PSUs) awarded October 14, 2022, achieved an 8% payout based on the greater of absolute revenue growth or relative performance against each direct competitor for each year of the three-year performance period. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock.

Represents shares withheld by the Issuer to satisfy tax withholding obligations in connection with issuance of 142 shares of common stock arising from payout under Performance Share Units (PSUs) awarded on awarded October 14, 2022. The payout was certified, and the shares issued on November 20, 2025. Each PSU is convertible into one share of common stock. These shares were not issued to or sold by the Reporting Person.