# EDGAR Filing Document

**Accession Number:** 0001887782
**File Stem:** 0001887782-25-000005
**Filing Date:** 2025-10
**Character Count:** 7334
**Document Hash:** 5f42f16cbcda791d9e4dc64fd951863c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001887782-25-000005.hdr.sgml**: 20251015

**ACCESSION NUMBER**: 0001887782-25-000005

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251013

**FILED AS OF DATE**: 20251015

**DATE AS OF CHANGE**: 20251015

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Chylak Robert Nestor
- **CENTRAL INDEX KEY:** 0001887782

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-00121
- **FILM NUMBER:** 251394497

**MAIL ADDRESS:**
- **STREET 1:** 1005 VIRGINIA DRIVE
- **CITY:** FORT WASHINGTON
- **STATE:** PA
- **ZIP:** 19034
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** KULICKE & SOFFA INDUSTRIES INC
- **CENTRAL INDEX KEY:** 0000056978
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 231498399
- **STATE OF INCORPORATION:** PA
- **FISCAL YEAR END:** 1004

**BUSINESS ADDRESS:**
- **STREET 1:** 23A SERANGOON NORTH AVENUE 5, #01-01
- **CITY:** SINGAPORE
- **STATE:** U0
- **ZIP:** 554369
- **BUSINESS PHONE:** 2157846000

**MAIL ADDRESS:**
- **STREET 1:** 23A SERANGOON NORTH AVENUE 5, #01-01
- **CITY:** SINGAPORE
- **STATE:** U0
- **ZIP:** 554369

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Chylak Robert Nestor<br><sub>(Last) (First) (Middle)</sub><br>1005 VIRGINIA DRIVE<br><sub>(Street)</sub><br>FORT WASHINGTON, PA 19034<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-10-13 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Senior Vice President_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>KULICKE & SOFFA INDUSTRIES INC [ KLIC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2025-10-13 |  | A |  | 7982<sup>(1)</sup> | A | $0 | 28210 | D |  |
| Common Stock | 2025-10-14 |  | M |  | 4368<sup>(2)</sup> | A | $0 | 32578 | D |  |
| Common Stock | 2025-10-14 |  | F |  | 675<sup>(3)</sup> | D | $40.05 | 31903 | D |  |
| Common Stock | 2025-10-14 |  | F |  | 1245<sup>(4)</sup> | D | $40.05 | 30658 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Performance Share Units | <sup>(2)</sup> | 2025-10-14 |  | M |  |  | 4368 | <sup>(2)</sup> | <sup>(2)</sup> | Common Stock | 4368 | $0 | 0 | D |  |

---

### Footnotes:

(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 ofthe 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.

**Signature:** Zi Yao Lim, Attorney-in-Fact for Robert Nestor Chylak  
**Date:** 2025-10-15

### Remarks:

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.**