Michael R. Kenison - 13 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: 13 Feb 2026
Net transactions value: -$436,296
Form type: 4
Filing time: 18 Feb 2026, 16:37:43 UTC
Previous filing: 12 Feb 2026
Next filing: 27 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	18 Feb 2026	0001870293

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	PRLB	Common Stock	Tax liability	$103,981	-1,540	-4.8%	$67.52	30,302	13 Feb 2026	Direct
transaction	PRLB	Common Stock	Sale	$332,315	-5,000	-17%	$66.46	25,302	17 Feb 2026	Direct	F1, F2

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

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id	Content
F1	This transaction was executed pursuant to a Rule 10b5 1 trading plan adopted by the Reporting Person on August 15, 2025.
F2	Reflects the weighted average price of 5,000 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on February 17, 2026, with sale prices ranging from $66.01 to $66.87 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.

Content

This transaction was executed pursuant to a Rule 10b5 1 trading plan adopted by the Reporting Person on August 15, 2025.

Reflects the weighted average price of 5,000 shares of common stock of Proto Labs Inc. sold by the reporting person in multiple transactions on February 17, 2026, with sale prices ranging from $66.01 to $66.87 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.