Proto Labs officer plans $446K share sale

The shares are attributed to restricted stock units that vested from February 13, 2023, through May 20, 2025.

Available on EDGAR 09/24/2026 - 04:43 PM EDT Accepted by SEC EDGAR 09/24/2026 - 04:42 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Proto Labs, Inc. officer Daniel Schumacher reported an intended sale of 5,000 common shares, with an aggregate market value of $445,650.00, through Morgan Stanley Smith Barney LLC Executive Financial Services. The shares were acquired through the vesting of restricted stock units from February 13, 2023, through May 20, 2025. His reported prior three-month sales, each identified as a 10b5-1 sale, were 4,900 shares on September 17, 2026, and 100 shares on September 16, 2026.

Key Figures

Common shares intended for sale: 5,000 shares Aggregate market value: $445,650.00 Shares outstanding: 23,921,897 shares +2 more

5 metrics

Common shares intended for sale 5,000 shares Reported intended sale

Aggregate market value $445,650.00 For the 5,000 common shares intended for sale

Shares outstanding 23,921,897 shares Count listed in the sale information

Prior 10b5-1 sale 4,900 shares; $417,535.37 September 17, 2026

Prior 10b5-1 sale 100 shares; $8,500.00 September 16, 2026

Key Terms

restricted stock units, 10b5-1, aggregate market value

3 terms

restricted stock units financial

"acquired upon the vesting of restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

10b5-1 regulatory

"10b5-1 Sales for DANIEL SCHUMACHER"

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.

aggregate market value financial

"Aggregate market value of securities to be sold"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

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

How many PRLB shares does Daniel Schumacher plan to sell?

Daniel Schumacher's notice lists an intended sale of 5,000 common shares with an aggregate market value of $445,650.00 through Morgan Stanley Smith Barney LLC Executive Financial Services.

How many PRLB shares did Daniel Schumacher report selling in the prior three months?

His reported sales were 4,900 shares on September 17, 2026, for $417,535.37, and 100 shares on September 16, 2026, for $8,500.00; both were identified as 10b5-1 sales.

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

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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	0001894753
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	DANIEL SCHUMACHER
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	5000	445650.00	23921897	09/24/2026	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	02/13/2023	Restricted Stock Units	Issuer			5000	02/13/2023	N/A

* 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 DANIEL SCHUMACHER 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	09/17/2026	4900	417535.37
10b5-1 Sales for DANIEL SCHUMACHER 5540 Pioneer Creek Drive Maple Plain MN 55359	Common	09/16/2026	100	8500.00

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 02/13/2023 through 5/20/2025.
Date of Notice	09/24/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/05/2026
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/ Daniel Schumacher
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)