PRLB insider files Form 144 to sell 200 shares

PRLB submitted a Form 144 notice reporting a proposed sale of 200 shares of Common Stock tied to an exercise of stock options, with the transaction dated 05/07/2026 and cash used for the exercise.

Rhea-AI Filing Summary

PRLB submitted a Form 144 notice reporting a proposed sale of 200 shares of Common Stock tied to an exercise of stock options, with the transaction dated 05/07/2026 and cash used for the exercise. The filing also lists prior 10b5-1 sales by Michael Kenison of 5,000 shares on 02/17/2026 for $332,315.00.

Key Figures

Proposed sale: 200 shares Prior 10b5-1 sale: 5,000 shares Proceeds from prior sale: $332,315.00

3 metrics

Proposed sale 200 shares exercise of stock options dated 05/07/2026

Prior 10b5-1 sale 5,000 shares sale by Michael Kenison on 02/17/2026

Proceeds from prior sale $332,315.00 proceeds reported for 5,000-share 10b5-1 sale on 02/17/2026

Key Terms

Form 144, 10b5-1, Exercise of Stock Options

3 terms

Form 144 regulatory

"submitted a Form 144 notice reporting a proposed sale"

Form 144 is a document that investors must file with the government when they plan to sell a large number of shares of a company's stock. It helps ensure transparency so everyone knows how many shares are being sold and when, which can impact the stock's price.

10b5-1 regulatory

"10b5-1 Sales for MICHAEL KENISON"

A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.

Exercise of Stock Options financial

"Exercise of Stock Options | Issuer | 200 | 05/07/2026 | Cash"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What does PRLB's Form 144 disclose?

It discloses a proposed sale of 200 shares tied to an option exercise dated 05/07/2026. The filing also notes previous 10b5-1 sales by Michael Kenison of 5,000 shares on 02/17/2026 for $332,315.00.

Who is the selling party in the PRLB Form 144?

The filing identifies the issuer-related transaction and lists Michael Kenison as a recent 10b5-1 seller. The 200-share item is recorded as an exercise-of-options sale dated 05/07/2026 and earlier 10b5-1 activity is recorded on 02/17/2026.

How many shares did Michael Kenison recently sell under a 10b5-1 plan?

The Form 144 notes a prior 10b5-1 sale of 5,000 shares on 02/17/2026 with reported proceeds of $332,315.00. This is listed separately from the 200-share option exercise reported on 05/07/2026.

What method was used for the 200-share transaction in PRLB's filing?

The 200-share item is recorded as an exercise of stock options with cash noted as the method on 05/07/2026. The Form 144 frames this as an issuer-related option exercise rather than an open-market block sale.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/07/2026 - 04:19 PM EDT Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001870293
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Proto Labs, Inc.
SEC File Number	001-35435
Address of Issuer	5540 Pioneer Creek Drive Maple Plain MINNESOTA 55359
Phone	7634793680
Name of Person for Whose Account the Securities are To Be Sold	MICHAEL KENISON
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	200	13778.00	23794045	05/07/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	05/07/2026	Exercise of Stock Options	Issuer			200	05/07/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
10b5-1 Sales for MICHAEL KENISON 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	02/17/2026	5000	332315.00

144: Remarks and Signature

Remarks
Date of Notice	05/07/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	08/15/2025
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Michael Kenison
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)