Proto Labs CFO Michael Rataj to Depart Effective May 15

Proto Labs Inc (PRLB) reported that chief financial officer Michael Rataj will depart the company effective May 15, 2026.

The departure affects the company's principal financial and accounting officer role, a single position required for SEC reporting and Sarbanes-Oxley compliance at the manufacturer of custom parts with annual revenue exceeding $500 million. No successor has been named.

Prior to the filing, Rataj held the CFO title with no stated end date. The new state leaves the position vacant after May 15, 2026. The 8-K states the company will disclose the appointment of an interim principal financial officer in a separate Form 8-K to be filed no later than four business days after the appointment, per Item 5.02 requirements.

The departure initiates an immediate internal process to identify and hire a permanent CFO. Until that appointment, the company must designate an interim officer who assumes responsibility for certifying financial statements in upcoming quarterly and annual reports.

The filing also obligates Proto Labs to furnish any related press release or investor presentation as an exhibit under Item 9.01, which the company did through a Regulation FD disclosure. These steps maintain compliance with SEC deadlines for the company's next Form 10-Q.

This marks the first executive officer departure disclosed by Proto Labs since its 2012 initial public offering. The company filed the 8-K on May 7, 2026 under Items 5.02, 7.01 and 9.01.