Proto Labs (PRLB) insider Kenison plans $947K stock sale in Form 144

Rhea-AI Filing Summary

Proto Labs, Inc. (PRLB) reports a planned sale of common stock by shareholder Michael R. Kenison. The filing lists 10,753 shares of common stock to be sold through Morgan Stanley Smith Barney LLC on the NYSE, with an indicated value of $947,786.62. It also details prior acquisitions from restricted stock vesting and purchases under an employee stock purchase plan, as well as common stock sales during the past three months.

Key Figures

Planned shares to be sold: 10,753 shares Indicated value of planned sale: $947,786.62 Shares sold on 05/12/2026: 16,030 shares +3 more

6 metrics

Planned shares to be sold 10,753 shares Common stock sale to be executed through Morgan Stanley Smith Barney LLC on NYSE

Indicated value of planned sale $947,786.62 Aggregate value associated with 10,753 common shares

Shares sold on 05/12/2026 16,030 shares Common stock sale reported under securities sold during the past 3 months

Proceeds on 05/12/2026 sale $1,113,915.08 Value associated with 16,030 common shares sold

Shares sold on 05/11/2026 7,433 shares Common stock sale reported under securities sold during the past 3 months

Proceeds on 05/11/2026 sale $522,011.00 Value associated with 7,433 common shares sold

Key Terms

Form 144, Restricted Stock Vesting Under a Registered Plan, Employee Stock Purchase Plan

3 terms

Form 144 regulatory

"144: Securities Sold During The Past 3 Months"

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.

Restricted Stock Vesting Under a Registered Plan financial

"Common | 05/20/2023 | Restricted Stock Vesting Under a Registered Plan"

Employee Stock Purchase Plan financial

"Shares Purchased Through Employee Stock Purchase Plan"

An employee stock purchase plan is a company program that lets workers buy shares through small payroll deductions, often at a discount to the market price and after a set offering period. Think of it like a workplace savings plan that turns into ownership: it encourages employees to share in the company’s success and can create predictable buying or selling of stock that investors watch because it affects supply, demand and employee incentives.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/04/2026 - 04:39 PM Accepted by SEC EDGAR 08/04/2026 - 04:38 PM Learn about SEC filing dates

FAQ

What does Proto Labs (PRLB) disclose in this Form 144?

The filing discloses a planned sale of 10,753 common shares by shareholder Michael R. Kenison, to be executed through Morgan Stanley Smith Barney LLC on the NYSE, with an indicated value of $947,786.62.

How many Proto Labs (PRLB) shares are planned to be sold and at what value?

The filing lists a proposed sale of 10,753 shares of common stock with an indicated aggregate value of $947,786.62, to be executed on or about 08/04/2026 on the NYSE through Morgan Stanley Smith Barney LLC.

What recent Proto Labs (PRLB) share sales by Michael Kenison are reported?

The document shows common stock sales on 05/12/2026 (16,030 shares for $1,113,915.08), 05/11/2026 (7,433 shares for $522,011.00), and 05/07/2026 (200 shares for $14,000.00) reported under securities sold during the past three months.

What types of Proto Labs (PRLB) share acquisitions are listed in the filing?

The filing lists common shares acquired through restricted stock vesting under a registered plan on multiple dates and through an employee stock purchase plan using cash contributions, with various small share amounts recorded between 2020 and 2026.

Which broker is involved in the planned Proto Labs (PRLB) stock sale?

The planned sale of 10,753 Proto Labs common shares is to be executed through Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004, on the NYSE marketplace.

Who is the security holder in this Proto Labs (PRLB) Form 144?

The security holder is identified as Michael R. Kenison, with an address at 5540 Pioneer Creek Drive, Maple Plain, MN 55359, in connection with both the proposed sale and the reported past three-month sales of Proto Labs common stock.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	10753	947786.62	23921897	08/04/2026	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	05/20/2023	Restricted Stock Vesting Under a Registered Plan	Issuer			1558	05/20/2023	Services Rendered
Common	02/13/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			779	02/13/2024	Services Rendered
Common	05/20/2024	Restricted Stock Vesting Under a Registered Plan	Issuer			758	05/20/2024	Services Rendered
Common	05/20/2025	Restricted Stock Vesting Under a Registered Plan	Issuer			461	05/20/2025	Services Rendered
Common	01/29/2026	Restricted Stock Vesting Under a Registered Plan	Issuer			5444	01/29/2026	Services Rendered
Common	05/15/2020	Shares Purchased Through Employee Stock Purchase Plan	Issuer			43	05/15/2020	Cash
Common	11/15/2020	Shares Purchased Through Employee Stock Purchase Plan	Issuer			32	11/15/2020	Cash
Common	05/15/2021	Shares Purchased Through Employee Stock Purchase Plan	Issuer			78	05/15/2021	Cash
Common	11/15/2021	Shares Purchased Through Employee Stock Purchase Plan	Issuer			95	11/15/2021	Cash
Common	05/15/2022	Shares Purchased Through Employee Stock Purchase Plan	Issuer			225	05/15/2022	Cash
Common	11/15/2022	Shares Purchased Through Employee Stock Purchase Plan	Issuer			262	11/15/2022	Cash
Common	05/15/2023	Shares Purchased Through Employee Stock Purchase Plan	Issuer			349	05/15/2023	Cash
Common	11/15/2023	Shares Purchased Through Employee Stock Purchase Plan	Issuer			197	11/15/2023	Cash
Common	05/15/2024	Shares Purchased Through Employee Stock Purchase Plan	Issuer			282	05/15/2024	Cash
Common	11/15/2024	Shares Purchased Through Employee Stock Purchase Plan	Issuer			70	11/15/2024	Cash
Common	05/15/2025	Shares Purchased Through Employee Stock Purchase Plan	Issuer			63	05/15/2025	Cash
Common	11/15/2025	Shares Purchased Through Employee Stock Purchase Plan	Issuer			57	11/15/2025	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
MICHAEL R KENISON 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	05/12/2026	16030	1113915.08
Michael Kenison 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	05/11/2026	7433	522011.00
Michael Kenison 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	05/07/2026	200	14000.00

144: Remarks and Signature

Remarks

Date of Notice

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)