Proto Labs Inc — Director's Dealing 2015

Aug 18, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Proto Labs Inc (PRLB)
CIK: 0001443669
Period of Report: 2015-08-14

Reporting Person: Tumelty John B. (VP/GM & Managing Director-EMEA)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-08-14	Common Stock	M	5428	$30.58	Acquired	9649	Direct
2015-08-14	Common Stock	M	6468	$47.08	Acquired	16117	Direct
2015-08-14	Common Stock	S	9000	$73.7888	Disposed	7117	Direct
2015-08-17	Common Stock	S	400	$74.7050	Disposed	6717	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2015-08-14	Employee Stock Option (right to buy)	$30.58	M	5428	Disposed	2022-05-07	Common Stock (1440)	Direct
2015-08-14	Employee Stock Option (right to buy)	$47.08	M	6468	Disposed	2023-02-15	Common Stock (1056)	Direct

Footnotes

F1: Reflects the weighted average price of 9,000 shares of common stock of Proto Labs, Inc. sold by the reporting person on August 14, 2015 with sale prices ranging from $73.55 to $74.43 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: Reflects the weighted average price of 400 shares of common stock of Proto Labs, Inc. sold by the reporting person on August 14, 2015 with sale prices ranging from $74.66 to $74.84 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.

F3: The option vests as to 20% of the shares in five installments beginning on May 7, 2013.

F4: The option vests as to 20% of the shares in five installments beginning on February 15, 2014.