Proto Labs Inc — Director's Dealing 2013

May 31, 2013

SEC Form 4/A — Form 4/A

Issuer: Proto Labs Inc (PRLB)
CIK: 0001443669
Period of Report: 2013-05-23

Reporting Person: Gawlick Rainer (Director)

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-05-23	Stock Option (right to buy)	$53.34	A	2715	Acquired	2023-05-23	Common Stock (2715)	Direct

Footnotes

F1: As the result of a clerical error, the Form 4 filed with the Securities and Exchange Commission on May 28, 2013 incorrectly reported 2,500 shares, instead of 2,715 shares, underlying the May 23, 2013 stock option award. This amended Form 4 corrects the number of shares awarded to the Reporting Person.

F2: The option vests in its entirety on May 23, 2014.