Daniel Schumacher, Chief Financial Officer of Proto Labs Inc (NYSE:PRLB), filed a Form 4 on September 18, 2026, disclosing the sale of 5,000 shares of common stock across two transactions on September 16 and September 17, 2026, executed under a pre-established Rule 10b5-1 trading plan.

Key Highlights

  • First sale: 100 shares of Proto Labs common stock were sold on September 16, 2026, at $85.00 per share.
  • Second sale: 4,900 shares were sold on September 17, 2026, at a weighted average price of $85.2113 per share, with individual sale prices ranging from $85.00 to $85.50.
  • Trading plan: Both transactions were executed pursuant to a Rule 10b5-1 trading plan adopted by Schumacher on June 5, 2026.
  • Remaining holdings: Following the transactions, Schumacher directly beneficially owns 40,019 shares of Proto Labs common stock.
  • Signatory: The form was signed by W. Morgan Burns as Attorney-in-Fact on September 18, 2026.

Proto Labs CFO Share Sales Under Scheduled 10b5-1 Plan

According to the filing, Daniel Schumacher, serving as Chief Financial Officer of Proto Labs Inc, disposed of a combined 5,000 shares of the company's common stock over two consecutive trading days. The first transaction, dated September 16, 2026, involved the sale of 100 shares at a price of $85.00 per share, leaving him with a directly held position of 44,919 shares following that transaction.

The second and larger transaction took place on September 17, 2026, when Schumacher sold 4,900 shares at a weighted average price of $85.2113. According to the filing, those shares were sold across multiple transactions with individual prices ranging from $85.00 to $85.50 per share. The filing notes that Schumacher "undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares sold at each separate price." After this second sale, his directly held beneficial ownership stands at 40,019 shares.

The filing indicates that both transactions were made pursuant to a Rule 10b5-1 trading plan that Schumacher adopted on June 5, 2026. The Form 4 also carries a checkbox confirming the transactions were executed under a contract, instruction, or written plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). No derivative securities activity was reported in the filing.

What Was Disclosed

Proto Labs CFO Daniel Schumacher sold a total of 5,000 shares of common stock on September 16 and 17, 2026, under a pre-scheduled Rule 10b5-1 plan, at prices between $85.00 and $85.50 per share, leaving a direct beneficial ownership of 40,019 shares.