• Proto Labs CFO Daniel Schumacher sold 5,000 common shares on Sep. 16-17, 2026.
• Sales totaled 100 shares at USD 85, then 4,900 shares at a weighted-average USD 85.21.
• Holding fell to 40,019 shares following the transactions.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. Proto Labs Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001628280-26-062704), on September 18, 2026, and is solely responsible for the information contained therein.