Proto Labs Inc — Director's Dealing 2025

May 28, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Proto Labs Inc (PRLB)
CIK: 0001443669
Period of Report: 2025-05-23

Reporting Person: Krishna Suresh (Director, President and CEO)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-05-23	Common Stock	A	16296	—	Acquired	16296	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-05-23	Employee Stock Option (right to buy)	$36.82	A	29522	Acquired	2035-05-23	Common Stock (29522)	Direct

Footnotes

F1: Restricted Stock Units that vest as follows: 25% of shares subject to the award will vest on May 23, 2026, and on each May 23rd thereafter until all shares subject to the award are fully vested.

F2: 25% of shares subject to the award will vest on May 23, 2026, and on each May 23rd thereafter until all shares subject to the award are fully vested.