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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1443669	Proto Labs Inc	PRLB	Fabricated Structural Metal Products (3440)	000000000

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1542616	B. John Tumelty	5540 Pioneer Creek Drive Maple Plain MN 55359	Managing Dir.-Proto Labs, Ltd.	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Acquisiton	2013-07-08	10,500	$7.86	10,500	No	4	M	Direct
Common Stock	Disposition	2013-07-08	8,009	$64.47	2,491	No	4	S	Direct
Common Stock	Disposition	2013-07-08	2,491	$65.42	0	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Employee Stock Option (right to buy)	Disposition	2013-07-08	10,500	$0.00	10,500	$7.86

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
52,500		2020-01-21	No	4	M	Direct

Footnotes

Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 6, 2013.
Reflects the weighted average price of 8,009 shares of common stock of Proto Labs, Inc. sold by the reporting person in multiple transactions on July 8, 2013 with sale prices ranging from $64.15 to $65.14 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.
Reflects the weighted average price of 2,491 shares of common stock of Proto Labs, Inc. sold by the reporting person in multiple transactions on July 8, 2013 with sale prices ranging from $65.154 to $65.85 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.
On 5/23/13, the Issuer's Board of Directors approved a change to the vesting terms of the stock option granted to the reporting person on 12/21/10. The stock option is amended to vest on a monthly basis in 2013 and will then vest 20% of the shares annually on each of 12/21/14 and 12/21/15.