# EDGAR Filing Document

**Accession Number:** 0001111928
**File Stem:** 0001111928-26-000068
**Filing Date:** 2026-3
**Character Count:** 11308
**Document Hash:** 85221275f5a507d2bdcb127e03b5935c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001111928-26-000068.hdr.sgml**: 20260306

**ACCESSION NUMBER**: 0001111928-26-000068

**CONFORMED SUBMISSION TYPE**: 10-K/A

**PUBLIC DOCUMENT COUNT**: 15

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260306

**DATE AS OF CHANGE**: 20260306

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** 10-K/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33155
- **FILM NUMBER:** 26731500

**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

?xml version='1.0' encoding='ASCII'? ipgp-20251231

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 10-K/A**

**(Amendment No. 1)**

(Mark One)

---

| | |
|:---|:---|
| ☑ | **ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934** |

---

For the fiscal year ended December 31, 2025

OR

☐ **TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934**

For the transition period from to .

Commission File Number: 001-33155

![image.jpg](ipgp-20251231_g1.jpg)

**IPG PHOTONICS CORPORATION**

*(Exact name of registrant as specified in its charter)*

---

| | |
|:---|:---|
| **Delaware** | **04-3444218** |
| *(State or other jurisdiction of incorporation or organization)* | *(IRS Employer Identification No.)* |
| **377 Simarano Drive, Marlborough, Massachusetts** | **01752** |
| *(Address of principal executive offices)* | *(Zip Code)* |

---

Registrant's telephone number, including area code: **(508) 373-1100**

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| <u>Title of Class</u> | <u>Trading Symbol</u> | <u>Name of Exchange on Which Registered</u> |
| **Common Stock, Par Value $0.0001 per share** | **IPGP** | **The Nasdaq Stock Market LLC** |

---

Securities registered pursuant to Section 12(g) of the Act: **None**

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.&nbsp;&nbsp;&nbsp;&nbsp;Yes ☑&nbsp;&nbsp;&nbsp;&nbsp; No ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.&nbsp;&nbsp;&nbsp;&nbsp;Yes ☐&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No ☑

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.&nbsp;&nbsp;&nbsp;&nbsp;Yes ☑&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).&nbsp;&nbsp;&nbsp;&nbsp;Yes ☑&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company" and "emerging growth company" in Rule 12b-2 of the Exchange Act.

---

| | | | |
|:---|:---|:---|:---|
| Large accelerated filer  | ☑ | Accelerated filer | ☐ |
| Non-accelerated filer | ☐ | Smaller reporting company | ☐ |
| | | Emerging growth company | ☐ |

---

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☑

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant's executive oﬃcers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).&nbsp;&nbsp;&nbsp;&nbsp;Yes ☐&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No ☑

The aggregate market value of the registrant's common stock held by non-affiliates of the registrant was approximately $1.8 billion, calculated based upon the closing price as reported by the Nasdaq Global Select Market on June 30, 2025. For purposes of this disclosure, shares of common stock held by persons who own 5% or more of the outstanding common stock and shares of common stock held by each officer and director have been excluded in that such persons may be deemed to be "affiliates" as that term is defined under the Rules and Regulations of the Exchange Act. This determination of affiliate status is not necessarily conclusive.

As of February 20, 2026, 42,191,353 shares of the registrant's common stock were outstanding.

**DOCUMENTS INCORPORATED BY REFERENCE**

Portions of the registrant's Proxy Statement for its 2026 Annual Meeting of Stockholders to be filed pursuant to Regulation 14A within 120 days of the end of the registrant's fiscal year ended December 31, 2025 are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent stated herein.

------

**EXPLANATORY NOTE**

On February 23, 2026, IPG Photonics Corporation (the "Company") filed with the Securities and Exchange Commission its Annual Report on Form 10-K for the fiscal year ended December 31, 2025 (the "Original Form 10-K"). The Original Form 10-K included disclosure in Part III stating that certain information required by Part III is incorporated by reference to the Company's definitive proxy statement for its 2026 Annual Meeting of Stockholders, which proxy statement is anticipated to be filed with the SEC within 120 days after December 31, 2025. This Amendment No. 1 on Form 10-K/A (this "Amendment No. 1") is being filed solely to amend the cover page of the Original Form 10-K to conform the cover page to the disclosure in Part III regarding such incorporation by reference.

No other changes have been made to the Original Form 10-K, and this Amendment No. 1 does not modify, amend or update in any way the financial statements or other disclosures as presented in the Original Form 10-K. This Amendment No. 1 does not reflect events that may have occurred subsequent to the filing date of the Original Form 10-K.

Pursuant to Rule 12b-15 under the Securities Exchange Act of 1934, as amended, this Amendment No. 1 includes new certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, which are attached hereto. Because no financial statements have been included in this Amendment No. 1 and this Amendment No. 1 does not contain or amend any disclosure with respect to Items 307 and 308 of Regulation S-K, paragraphs 3, 4 and 5 of the certifications have been omitted. Similarly, because no financial statements have been included in this Amendment No. 1, certifications pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 have been omitted.

------

**PART IV**

**ITEM 15. *EXHIBITS AND FINANCIAL STATEMENT SCHEDULES***

b. Exhibits.

---

| | |
|:---|:---|
| **<u>Exhibit Number</u>** | **<u>Description</u>** |
| 31.1\* | <u>[Certification of Chief Executive Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended](ex3112025123110-ka.htm)</u> |
| 31.2\* | <u>[Certification of Chief Financial Officer pursuant to Rule 13a-14(a) of the Securities Exchange Act of 1934, as amended](ex3122025123110-ka.htm)</u> |
| 101.INS\* | Inline XBRL Instance Document |
| 101.SCH\* | Inline XBRL Taxonomy Extension Schema |
| 101.LAB\* | Inline XBRL Taxonomy Extension Label Linkbase |
| 101.PRE\* | Inline XBRL Taxonomy Extension Presentation Linkbase |
| 104\* | Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101) |

---

\* Filed herewith.

------

**SIGNATURES**

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, as amended, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized, on March 6, 2026.

---

| | |
|:---|:---|
| IPG PHOTONICS CORPORATION | IPG PHOTONICS CORPORATION |
| By: | /s/ Mark M. Gitin |
|  | Mark M. Gitin <br>*Chief Executive Officer*  |

---

## Exhibit 31.1

***Exhibit 31.1***

**CERTIFICATION OF CHIEF EXECUTIVE OFFICER**

**PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)**

**OF THE SECURITIES EXCHANGE ACT OF 1934**

I, Mark M. Gitin, certify that:

1. I have reviewed this Amendment No. 1 to the Annual Report filed on Form 10-K of IPG Photonics Corporation for the year ended December 31, 2025; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: March 6, 2026

---

| |
|:---|
| */s/ Mark M. Gitin* |
| Chief Executive Officer<br>(Principal Executive Officer) |

---

## Exhibit 31.2

***Exhibit 31.2***

**CERTIFICATION OF CHIEF FINANCIAL OFFICER**

**PURSUANT TO RULE 13a-14(a) OR RULE 15d-14(a)** 

**OF THE SECURITIES EXCHANGE ACT OF 1934**

I, Timothy P.V. Mammen, certify that:

1. I have reviewed this Amendment No. 1 to the Annual Report filed on Form 10-K of IPG Photonics Corporation for the year ended December 31, 2025; and

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.

Date: March 6, 2026

---

| |
|:---|
| */s/ Timothy P.V. Mammen* |
| Timothy P.V. Mammen<br>Senior Vice President and Chief Financial Officer<br>(Principal Financial Officer) |

---

<br>