Michael R. Kenison - 25 Feb 2026 Form 4 Insider Report for Proto Labs Inc (PRLB)

Role: Chief Operations Officer
Signature: /s/ W. Morgan Burns, Attorney-in-Fact
Issuer symbol: PRLB
Transactions as of: 25 Feb 2026
Net transactions value: -$33,257
Form type: 4
Filing time: 27 Feb 2026, 16:16:17 UTC
Previous filing: 18 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Kenison Michael R.	Chief Operations Officer	5540 PIONEER CREEK DRIVE, MAPLE PLAIN	/s/ W. Morgan Burns, Attorney-in-Fact	27 Feb 2026	0001870293

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PRLB	Common Stock	Award	$0	+2,415	+9.5%	$0.000000	27,717	25 Feb 2026	Direct	F1
transaction	PRLB	Common Stock	Tax liability	$33,257	-531	-1.9%	$62.63	27,186	25 Feb 2026	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	PRLB	Employee Stock Option (right to buy)	Award	$0	+4,404		$0.000000	4,404	25 Feb 2026	Common Stock	4,404	$62.63	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Restricted Stock Units that vest as follows: 25% of shares subject to the award will vest on February 25, 2027, and on each February 25th thereafter until all shares subject to the award are fully vested.
F2	25% of shares subject to the award will vest on February 25, 2027, and on each February 25th thereafter until all shares subject to the award are fully vested.