Proto Labs Inc

For the period ended Sep 30, 2026. Filed Oct 29, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Oct 29, 2026

PRLB$69.09+5.2%Stored close · as of Nov 9, 2026

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Contents

Item 6. Exhibits

The following documents are filed or furnished, as applicable, as part of this Quarterly Report on Form 10-Q:

Exhibit Number	Description of Exhibit
3.1	Third Amended and Restated Articles of Incorporation of Proto Labs, Inc. (incorporated by reference to Exhibit 3.2 to the Company’s Registration Statement on Form S-1/A, filed on February 13, 2012).
3.2	Articles of Amendment to Third Amended and Restated Articles of Incorporation of Proto Labs, Inc. dated May 20, 2015 (incorporated by reference to Exhibit 3.1 to the Company's Form 8-K, filed on May 21, 2015).
3.3	Third Amended and Restated By-Laws of Proto Labs, Inc., as amended through November 15, 2022 (incorporated by reference to Exhibit 3.2 to the Company's Form 8-K, filed on November 15, 2022).
31.1	Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act*
31.2	Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act*
32.1	Certification of the Chief Executive Officer and the Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act**
101.INS	Inline XBRL Instance Document (the Instance Document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document)*
101.SCH	Inline XBRL Taxonomy Extension Schema Document*
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document*
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document*
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document*
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document*
104	Cover Page Interactive Data File (formatted as Inline XBRL and contained in Exhibit 101)*

*Filed herewith.

**Furnished herewith.

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 thereunto duly authorized.

	Proto Labs, Inc.
Date: October 29, 2026	/s/ Suresh Krishna
	Suresh Krishna
	President and Chief Executive Officer(Principal Executive Officer)
Date: October 29, 2026	/s/ Daniel Schumacher
	Daniel Schumacher
	Chief Financial Officer(Duly Authorized Officer, Principal Financial Officer and Principal Accounting Officer)

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.