Proto Labs (PRLB) taps Marc Kermisch as Chief Technology & AI Officer

Rhea-AI Filing Summary

Proto Labs, Inc. reported a leadership change in its technology organization. On October 3, 2025, the company announced that Chief Technology Officer Oleg Ryaboy will depart and cease to be an employee effective November 2, 2025, and is no longer an executive officer as of that notice date.

Marc Kermisch has been appointed as the new Chief Technology & AI Officer, effective October 13, 2025, marking a transition that adds explicit responsibility for artificial intelligence. Upon departure, Mr. Ryaboy will receive severance benefits under the company’s existing Form of Executive Severance Agreement. The company also issued a press release detailing this leadership transition.

Insights

Corporate governance and leadership analyst

Proto Labs reshapes top technology role with new Chief Technology & AI Officer.

The company is transitioning from outgoing CTO Oleg Ryaboy to incoming Chief Technology & AI Officer Marc Kermisch, with effectiveness on October 13, 2025 for the new appointment and November 2, 2025 for Ryaboy’s employment end. This recasts the senior role to explicitly include AI oversight.

The use of an existing Form of Executive Severance Agreement for Ryaboy’s departure indicates a structured and pre-defined separation framework. The leadership shift concentrates technology and AI responsibilities in a single executive, and future disclosures may clarify how this affects product and innovation priorities.

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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

FAQ

What leadership change did Proto Labs (PRLB) disclose in this 8-K?

Proto Labs disclosed a change in its top technology leadership. The company announced that Chief Technology Officer Oleg Ryaboy will depart, and that Marc Kermisch has been appointed Chief Technology & AI Officer, with his appointment effective October 13, 2025, marking a formal leadership transition.

When is Proto Labs CTO Oleg Ryaboy’s departure effective?

Oleg Ryaboy’s employment with Proto Labs ends on November 2, 2025. As of the October 3, 2025 notice date, he is no longer the company’s Chief Technology Officer or an executive officer, establishing a defined transition period prior to his final departure date.

Who is Proto Labs’ new Chief Technology & AI Officer and when do they start?

Proto Labs appointed Marc Kermisch as Chief Technology & AI Officer. His appointment becomes effective October 13, 2025, placing him in charge of technology and artificial intelligence functions shortly after the company announced the leadership transition on October 3, 2025.

Will departing CTO Oleg Ryaboy receive severance from Proto Labs (PRLB)?

Yes, Oleg Ryaboy will receive severance benefits. The company states he will be entitled to the severance benefits described in Section 5(A) of its Form of Executive Severance Agreement, which had previously been filed as an exhibit with the Securities and Exchange Commission.

Did Proto Labs issue a press release about this CTO transition?

Yes, Proto Labs issued a press release on the transition. On the October 3, 2025 notice date, the company released a press statement describing the leadership change, which is attached as Exhibit 99.1 and referenced under Item 7.01 in the filing.

Is Proto Labs’ leadership transition information considered filed or furnished?

The leadership transition press release is treated as furnished. The company notes that the information in Item 7.01, including Exhibit 99.1, is not deemed “filed” for purposes of Section 18 of the Exchange Act and is not automatically incorporated into other securities filings.