Proto Labs Inc — Director's Dealing 2026

Feb 27, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Proto Labs Inc (PRLB)
CIK: 0001443669
Period of Report: 2026-02-25

Reporting Person: Kenison Michael R. (Chief Operations Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-25	Common Stock	A	2415	—	Acquired	27717	Direct
2026-02-25	Common Stock	F	531	$62.63	Disposed	27186	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-25	Employee Stock Option (right to buy)	$62.63	A	4404	Acquired	2036-02-25	Common Stock (4404)	Direct

Footnotes

F1: Restricted Stock Units that vest as follows: 25% of shares subject to the award will vest on February 25, 2027, and on each February 25th thereafter until all shares subject to the award are fully vested.

F2: 25% of shares subject to the award will vest on February 25, 2027, and on each February 25th thereafter until all shares subject to the award are fully vested.