PROTO LABS, INC. (NYSE:PRLB) Files An 8-K Other Events
Item 8.01. Other Events.

In May 2018, the Compensation Committee (the “Committee”) of the Board of Directors of Proto Labs, Inc. (the “Company”), with the advice of its independent compensation consultant, undertook a comprehensive review of the Company’s compensation practices. In connection with this review, on May16, 2018, the Committee approved a change to the Company’s executive stock ownership guidelines to further align the interests of the Company’s Chief Executive Officer (the “CEO”) with those of the Company’s shareholders. Under the updated guidelines, the CEO is expected to own shares of the Company’s common stock with a value at least equal to five times the CEO’s annual base salary. Previously, the CEO was expected to own shares with a value at least equal to three times the CEO’s annual base salary. For purposes of the guidelines, fully-vested shares beneficially owned by an executive under Section 16 of the Securities Exchange Act of 1934 are counted as owned shares, and shares subject to any unvested or unexercised equity-based awards are not counted as owned shares. An executive has five years from the date of becoming subject to the guidelines to achieve compliance, and the executive must hold 50% of the net shares acquired upon vesting or exercise of any equity award until the executive has satisfied the ownership guidelines.

About PROTO LABS, INC. (NYSE:PRLB)

Proto Labs, Inc. is an online and technology-enabled manufacturer of on-demand three-dimensional (3D)-printed, computer numerical control (CNC) machined and injection-molded custom parts for prototyping and short-run production. It utilizes injection molding, CNC machining and 3D printing to manufacture custom parts for its customers. The Company targets its products to the product developers and engineers who use three-dimensional computer-aided design (3D CAD) software to design products across a range of end-markets. It has operations in the United States, Europe and Japan. The Company’s manufacturing product lines include injection molding (Protomold), CNC machining (Firstcut) and 3D printing (Fineline). The Company’s 3D Printing (Fineline) product line includes stereolithography (SL), selective laser sintering (SLS) and direct metal laser sintering (DMLS) processes, which offers customers a range of precision rapid prototyping and low volume production.