Black Archie C. 4

What Happened
Archie C. Black, a member of Proto Labs' (PRLB) Board of Directors, was granted 2,210 deferred stock units (reported as an acquisition, code A) on 2026-05-19 at $0.00 per share (total reported value $0). This was a compensation award to a director, not an open-market purchase or sale.

Key Details

• Transaction date: 2026-05-19; Form 4 filed: 2026-05-21 (timely filing).
• Transaction type/code: Award/Grant (A). Price reported: $0.00; shares/units: 2,210.
• Shares owned after the transaction: not specified in the filing.
• Footnote: These are deferred stock units that vest in full on the earlier of the first anniversary of the grant date or the date of the 2027 Annual Meeting of Shareholders; units must be retained until the reporting person's service on the board ends.
• No sale or purchase on the open market was reported.

Context
Deferred stock units (DSUs) are a form of equity compensation that postpone receipt of shares (and sometimes cash) until vesting or a later date; they are commonly used for director pay. This award reflects routine director compensation and should not be read as a direct market buy or sell signal.