# EDGAR Filing Document

**Accession Number:** 0001443669
**File Stem:** 0001443669-26-000006
**Filing Date:** 2026-2
**Character Count:** 5880
**Document Hash:** 5104760c8ec7215239eeb106c3e8e19c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001443669-26-000006.hdr.sgml**: 20260206

**ACCESSION NUMBER**: 0001443669-26-000006

**CONFORMED SUBMISSION TYPE**: 8-K/A

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260206

**ITEM INFORMATION**: Results of Operations and Financial Condition

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260206

**DATE AS OF CHANGE**: 20260206

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Proto Labs Inc
- **CENTRAL INDEX KEY:** 0001443669
- **STANDARD INDUSTRIAL CLASSIFICATION:** FABRICATED STRUCTURAL METAL PRODUCTS [3440]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MN
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35435
- **FILM NUMBER:** 26607087

**BUSINESS ADDRESS:**
- **STREET 1:** 5540 Pioneer Creek
- **CITY:** Maple Plain
- **STATE:** MN
- **ZIP:** 55359
- **BUSINESS PHONE:** 763-479-7474

**MAIL ADDRESS:**
- **STREET 1:** 5540 Pioneer Creek
- **CITY:** Maple Plain
- **STATE:** MN
- **ZIP:** 55359

?xml version='1.0' encoding='ASCII'? prlb-20260206

**UNITED STATES**

**SECURITIES AND EXCHANGE COMMISSION**

**Washington, D.C. 20549**

**FORM 8-K/A**

**Amendment No. 1**

**CURRENT REPORT**

**PURSUANT TO SECTION 13 OR 15(d) OF**

**THE SECURITIES EXCHANGE ACT OF 1934**

**Date of Report (Date of earliest event reported): February 6, 2026**

**Proto Labs, Inc.**

(Exact name of registrant as specified in its charter)

Minnesota 001-35435 41-1939628 <br> (State or other jurisdictionof incorporation) (Commission File Number) (IRS EmployerIdentification Number)

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| | |
|:---|:---|
| 5540 Pioneer Creek Drive<br>Maple Plain, Minnesota | 55359 |
| (Address of principal executive offices) | (Zip Code) |
| Registrant's telephone number, including area code: | (763) 479-3680 |

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Not Applicable <br> (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

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| | | |
|:---|:---|:---|
| Title of each class | Trading Symbol(s) | Name of each exchange on which registered |
| Common Stock, Par Value $0.001 Per Share | PRLB | New York Stock Exchange |

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Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

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. ☐

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**EXPLANATORY NOTE**

This Current Report on Form 8-K/A (this "Amendment") is being filed as an amendment to the Current Report on Form 8-K filed by Proto Labs, Inc. (the "Company") with the Securities and Exchange Commission ("SEC") on February 6, 2026 (the "Original Report"). The sole purpose for filing this Amendment is to correct a scrivener's error in reporting the guidance range for GAAP diluted earnings per share ("EPS") for the first quarter of 2026 as described in the press release furnished as Exhibit 99.1 to the Original Report (the "Original Exhibit 99.1"). The correct GAAP diluted EPS guidance range for Q1 2026 is $0.18 to $0.26, rather than the guidance range of $0.17 to $0.25 as reported in the Original Exhibit 99.1 (the "Specified Error"). This Amendment supplements the Original Report and should be read in conjunction with the Original Report. No other changes have been made to the Original Report or Original Exhibit 99.1 other than to correct the Specified Error, as described above and reflected below.

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| | |
|:---|:---|
| **Item 2.02.** | **Results of Operations and Financial Condition.** |

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On February 6, 2026, Proto Labs, Inc. issued a press release announcing its fourth quarter and full year 2025 financial results. The information set forth above under the heading "Explanatory Note" is incorporated by reference into this Item 2.02.

The information contained in Items 2.02 and 9.01 of this report is being "furnished" and not "filed" with the SEC for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities under such section. Furthermore, such information shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, unless specifically identified as being incorporated therein by reference.

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| | |
|:---|:---|
| **Item 9.01.** | **Financial Statements and Exhibits.** |

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**(d)Exhibits**

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

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**SIGNATURE**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

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| | | | |
|:---|:---|:---|:---|
| | | Proto Labs, Inc. | Proto Labs, Inc. |
| Date: | February 6, 2026 | By: | /s/ Daniel Schumacher |
|  |  |  | Daniel Schumacher |
|  |  |  | Chief Financial Officer |

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