UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): October 3, 2025

Proto Labs, Inc.

(Exact name of registrant as specified in its charter)

Minnesota

001-35435

41-1939628

(State or other jurisdiction
of incorporation)

(Commission File Number)

(IRS Employer
Identification Number)

5540 Pioneer Creek Drive

Maple Plain, Minnesota

55359

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code:

(763) 479-3680

Not Applicable

(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:

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

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. ¨

Item 5.02.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On October 3, 2025 (the “Notice Date”), Proto Labs, Inc. (the “Company”) announced that Oleg Ryaboy, Chief Technology Officer, will depart the Company and cease to be an employee, effective November 2, 2025. As of the Notice Date, Mr. Ryaboy is no longer the Company’s Chief Technology Officer or an executive officer of the Company. Marc Kermisch has been appointed to serve as the Company’s new Chief Technology & AI Officer, effective October 13, 2025.

Upon his departure, Mr. Ryaboy will be entitled to receive the severance benefits described in Section 5(A) of the Company's Form of Executive Severance Agreement filed as Exhibit 99.2 to the Company’s Current Report on Form 8-K filed with the Securities and Exchange Commission on June 6, 2022.

Item 7.01.

Regulation FD Disclosure.

On the Notice Date, the Company issued a press release announcing the leadership transition described in Item 5.02 above. A copy of the press release is attached hereto as Exhibit 99.1.

In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liability of that section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in that filing.

Item 9.01.

Financial Statements and Exhibits.

(d)

Exhibits

Exhibit No.	Description
99.1	Press release, dated October 3, 2025
104	Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

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.

	PROTO LABS, INC.

Date: October 3, 2025	/s/ Daniel Schumacher
	Daniel Schumacher
	Chief Financial Officer

Exhibit 99.1

Protolabs Appoints Marc Kermisch as New Chief Technology and AI Officer

MINNEAPOLIS, MINN.—Oct. 3, 2025—Global digital manufacturing leader Protolabs (NYSE: PRLB) today announced Marc Kermisch as its new Chief Technology and AI Officer, effective Monday, Oct. 13, 2025. Kermisch will lead Protolabs’ global technology organization and succeeds previous CTO, Oleg Ryaboy, who has departed the company.

“I want to thank Oleg for his leadership and expertise over the past 3 years during our continued evolution as a digital manufacturer,” said Suresh Krishna, President and CEO at Protolabs. “As we look towards the future, technological advancement is firmly at the core of our manufacturing innovation and the catalyst for our long-term strategic vision of complete prototyping-to-production support for our customers. Marc’s experience leading technology, R&D, and AI teams at several global companies positions him well to lead this exciting next chapter of digital manufacturing at Protolabs.”

Kermisch brings 25+ years of senior executive experience at technology and R&D organizations across diverse industries including manufacturing, software, and retail. Most recently, he served as CTO for Emergent Software, a full-stack technology company specializing in software development, cloud transformation, artificial intelligence (AI), and data engineering solutions. Prior to Emergent, he was Global Chief Digital and Information Officer at Case New Holland (NYSE: CNH), a $20 billion manufacturer of agriculture and construction equipment where he focused on developing autonomous vehicles, precision farming applications, and electric powertrains. Kermisch has also held executive leadership positions at Optum Rx, Bluestem Brands, and Red Wing Shoe Company, among others, and presently sits on the Board of Directors at American AgCredit and Crew Carwash.

“Protolabs’ tech-driven approach is at the forefront of the current manufacturing space,” said Kermisch. “From intuitive online quoting to advanced machine automation to accelerated quality control processes, there’s a digital thread infused throughout the company’s entire manufacturing process. The opportunity to expand that digital foundation through innovation in software and AI tools is very intriguing to me. AI has the capability to transform every business process, and I am excited to further integrate this cutting-edge technology across the digital manufacturing landscape at Protolabs.”

About Protolabs

Protolabs is the world’s fastest manufacturing service enabling companies across every industry to streamline production of quality parts throughout the entire product life cycle. From custom prototyping to end-use production, we support product developers, engineers, and supply chain teams along every phase of their manufacturing journey. Get started now at protolabs.com.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical or current facts are “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. These statements involve known and unknown risks, uncertainties, and other factors which may cause the results of Protolabs to be materially different than those expressed or implied in such statements. Certain of these risk factors and others are described in the “Risk Factors” section within reports filed with the SEC. Other unknown or unpredictable factors also could have material adverse effects on Protolabs’ future results. The forward-looking statements included in this press release are made only as of the date hereof. Protolabs cannot guarantee future results, levels of activity, performance or achievements. Accordingly, you should not place undue reliance on these forward-looking statements. Finally, Protolabs expressly disclaims any intent or obligation to update any forward-looking statements to reflect subsequent events or circumstances.

Investor Relations Contacts

Protolabs

Ryan Johnsrud, 612-225-4873

Manager, IR and Corporate Development

[email protected]

Gateway Group, Inc.
949-574-3860
[email protected]

Media Contact

Protolabs
Brent Renneke, 763-479-7704
Marketing Communications Manager
[email protected]