[4] – Wong Lester A (CIK 0001529306)

Rhea-AI Filing Summary

Kulicke & Soffa (KLIC) reported insider activity by its Chief Financial Officer. On 10/13/2025, the CFO acquired 9,462 shares of common stock at $0 following vesting. On 10/14/2025, 10,951 Performance Share Units (PSUs) converted into an equal number of shares at $0, reflecting an 82% payout based on three-year total shareholder return relative to a semiconductor peer group. Following these transactions, the CFO beneficially owned 100,049 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^*

Wong Lester A

(Last) (First) (Middle)

23A SERANGOON NORTH AVENUE 5

#01-01

(Street)

SINGAPORE U0 554369

(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)
	Chief Financial Officer

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		9,462(1)	A	$0	89,098	D
Common Stock	10/14/2025		M		10,951(2)	A	$0	100,049	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			10,951	(2)	(2)	Common Stock	10,951	$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.

Remarks:

	Zi Yao Lim, Attorney-in-Fact for Lester A. Wong	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.
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FAQ

What insider transaction did KLIC’s CFO report?

The CFO reported acquiring 9,462 shares on 10/13/2025 and 10,951 shares on 10/14/2025 through PSU conversion, both at $0.

How many KLIC shares does the CFO own after these transactions?

Beneficial ownership was 100,049 shares following the reported transactions.

What triggered the 10,951-share issuance on 10/14/2025?

10,951 PSUs awarded on October 14, 2022 converted to shares after an 82% payout was certified based on three-year TSR performance.

What was the price per share for the reported acquisitions?

Both the 9,462-share vesting and the 10,951-share PSU conversion occurred at $0 per share.

What role does the reporting person hold at KLIC?

The reporting person is the Chief Financial Officer of Kulicke & Soffa Industries, Inc.

How was performance measured for the PSU payout?

Performance used total shareholder return relative to GICS 45301020 semiconductor peers over a three-year period.