# EDGAR Filing Document

**Accession Number:** 0001130423
**File Stem:** 0001111928-25-000157
**Filing Date:** 2025-10
**Character Count:** 8925
**Document Hash:** 3feddb0c2b70d2e17caf2d01fd70bfc1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001111928-25-000157.hdr.sgml**: 20251021

**ACCESSION NUMBER**: 0001111928-25-000157

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251017

**FILED AS OF DATE**: 20251021

**DATE AS OF CHANGE**: 20251021

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** IP FIBRE DEVICES LTD
- **CENTRAL INDEX KEY:** 0001130423

**ORGANIZATION NAME:**
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33155
- **FILM NUMBER:** 251408195

**BUSINESS ADDRESS:**
- **STREET 1:** C/O IPG PHOTONICS CORP
- **STREET 2:** 377 SIMARANO DRIVE
- **CITY:** MARLBOROUGH
- **STATE:** MA
- **ZIP:** 01752
- **BUSINESS PHONE:** 508-373-1100

**MAIL ADDRESS:**
- **STREET 1:** C/O IPG PHOTONICS CORPORATION
- **STREET 2:** 377 SIMARANO DRIVE
- **CITY:** MARLBOROUGH
- **STATE:** MA
- **ZIP:** 01752
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IPG PHOTONICS CORP
- **CENTRAL INDEX KEY:** 0001111928
- **STANDARD INDUSTRIAL CLASSIFICATION:** SEMICONDUCTORS & RELATED DEVICES [3674]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 043444218
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 377 SIMARANO DRIVE
- **CITY:** MARLBOROUGH
- **STATE:** MA
- **ZIP:** 01752
- **BUSINESS PHONE:** 5083731100

**MAIL ADDRESS:**
- **STREET 1:** 377 SIMARANO DRIVE
- **CITY:** MARLBOROUGH
- **STATE:** MA
- **ZIP:** 01752

### 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).

[x] 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>IP FIBRE DEVICES LTD<br><sub>(Last) (First) (Middle)</sub><br>C/O IPG PHOTONICS CORPORATION<br>377 SIMARANO DRIVE<br><sub>(Street)</sub><br>MARLBOROUGH, MA 01752<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-10-17 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [X] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>IPG PHOTONICS CORP [ IPGP ] | **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 | 2025-10-17 |  | S |  | 15684 | D<sup>(1)</sup> | 84.62<sup>(2)</sup> | 6834153 | D |  |
| Common Stock | 2025-10-17 |  | S |  | 875 | D<sup>(1)</sup> | 85.71<sup>(3)</sup> | 6833278 | D |  |
| Common Stock | 2025-10-20 |  | S |  | 6543 | D<sup>(1)</sup> | 87.10<sup>(4)</sup> | 6826735 | D |  |
| Common Stock | 2025-10-20 |  | S |  | 15951 | D<sup>(1)</sup> | 87.88<sup>(5)</sup> | 6810784 | D |  |
| Common Stock | 2025-10-20 |  | S |  | 1148 | D<sup>(1)</sup> | 88.54<sup>(6)</sup> | 6809636 | D |  |
| Common Stock | 2025-10-21 |  | S |  | 11426 | D<sup>(1)</sup> | 87.77<sup>(7)</sup> | 6798210 | D |  |
| Common Stock | 2025-10-21 |  | S |  | 12540 | D<sup>(1)</sup> | 88.05<sup>(8)</sup> | 6785670 | 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 |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 13, 2025.

(2) The reported transaction involves sale transactions ranging from $84.05 to $85.02 per share. The weighted average price per share was $84.62. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(3) The reported transaction involves sale transactions ranging from $85.38 to $85.98 per share. The weighted average price per share was $85.71. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(4) The reported transaction involves sale transactions ranging from $86.41 to $87.38 per share. The weighted average price per share was $87.10. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(5) The reported transaction involves sale transactions ranging from $87.43 to $88.37 per share. The weighted average price per share was $87.88. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(6) The reported transaction involves sale transactions ranging from $88.44 to $88.69 per share. The weighted average price per share was $88.54. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(7) The reported transaction involves sale transactions ranging from $86.90 to $87.89 per share. The weighted average price per share was $87.77. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

(8) The reported transaction involves sale transactions ranging from $87.99 to $88.33 per share. The weighted average price per share was $88.05. The Reporting Person undertakes to provide uponrequest by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

**Signature:** /s/ Adam N. King, Attorney-in-Fact  
**Date:** 2025-10-21

### 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.**