Douglas W Kohrs

Insider

First SEC filing: April 4, 2012 · Latest: April 4, 2012

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Insider at

0 buys (P) 0 sells (S) Net: $0 + 4 non-open-market transactions below last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

No open-market trades on record; showing all filings.

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 23, 2013	PRLB	A	2,715	—	—	2,715 Direct	—	Acquired	(price as of 2026-08-21)
May 23, 2013	PRLB	A	2,500	—	—	2,500 Direct	—	Acquired	(price as of 2026-08-21)
May 7, 2012	PRLB	A	4,762	—	—	4,762 Direct	—	Acquired	(price as of 2026-08-21)
May 7, 2012	PRLB	A	3,270	—	—	3,270 Direct	—	Acquired	(price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Options, RSUs and convertible securities reported on Form 4 Table II.

Date	Ticker	Security	Underlying	Exercise price	Expiration	Shares	A/D
May 23, 2013	PRLB	Stock Option (right to buy)	Common Stock (2,715)	$53.34	May 23, 2023	2,715	Acquired
May 23, 2013	PRLB	Stock Option (right to buy)	Common Stock (2,500)	$53.34	May 23, 2023	2,500	Acquired
May 7, 2012	PRLB	Stock Option (right to buy)	Common Stock (4,762)	$30.58	May 7, 2022	4,762	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
April 4, 2012	PRLB	Common Stock	0	Direct