Proto Labs Inc — Director's Dealing 2013

Mar 1, 2013

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Proto Labs Inc (PRLB)
CIK: 0001443669
Period of Report: 2013-02-27

Reporting Person: Bolton Edward E. (Vice President, Culture)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2013-02-27	Common Stock	M	10500	$16.00	Acquired	11610	Direct
2013-02-27	Common Stock	S	10710	$46.1257	Disposed	900	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2013-02-27	Employee Stock Option (Right to Buy)	$16.00	M	10500	Disposed	2022-02-23	Common Stock (10500)	Direct

Footnotes

F1: Reflects the weighted average price of 10,710 shares of common stock of Proto Labs, Inc. sold by the reporting person in multiple transactions on February 27, 2013 with sale prices ranging from $46.00 to $46.31 per share. The reporting person 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.

F2: The option vests as to 25% of the shares in four annual installments beginning on February 23, 2013.