Proto Labs officer plans sale of 100 shares

Proto Labs, Inc. (PRLB) received a Rule 144 notice from officer Daniel Schumacher regarding a proposed sale of 100 shares of common stock through Morgan Stanley Smith Barney LLC on the NYSE, dated September 16, 2026.

Available on EDGAR 09/16/2026 - 04:31 PM EDT Accepted by SEC EDGAR 09/16/2026 - 04:31 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Proto Labs, Inc. (PRLB) received a Rule 144 notice from officer Daniel Schumacher regarding a proposed sale of 100 shares of common stock through Morgan Stanley Smith Barney LLC on the NYSE, dated September 16, 2026. The shares were acquired upon vesting of restricted stock units granted on May 20, 2020 and vesting through February 13, 2025.

Key Figures

Shares proposed for sale: 100 shares Approximate aggregate market value: 7,909.00 Date of proposed sale: September 16, 2026 +3 more

6 metrics

Shares proposed for sale 100 shares Common stock covered by Daniel Schumacher’s Rule 144 notice

Approximate aggregate market value 7,909.00 Value field reported for the 100 shares to be sold

Date of proposed sale September 16, 2026 Date associated with the sale of the 100 shares

Grant date of RSUs May 20, 2020 Restricted stock units from which the shares were acquired

End of vesting period February 13, 2025 End of the vesting period for the restricted stock units

Date of notice September 16, 2026 Date on which the Rule 144 notice was filed

Key Terms

Rule 144, restricted stock units, Common

3 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

restricted stock units financial

"The securities to be sold were 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.

Common financial

"Common | Morgan Stanley Smith Barney LLC Executive Financial Services"

FAQ

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

What does the Form 144 filing disclose for PRLB?

It discloses that officer Daniel Schumacher filed a Rule 144 notice to sell 100 shares of Proto Labs, Inc. common stock through Morgan Stanley Smith Barney LLC on the NYSE, with the notice dated September 16, 2026.

How many PRLB shares are covered by Daniel Schumacher’s Rule 144 notice?

The notice covers a proposed sale of 100 shares of Proto Labs, Inc. common stock. These shares are to be sold through Morgan Stanley Smith Barney LLC’s Executive Financial Services platform.

How were the PRLB shares in this Form 144 acquired?

The shares were acquired upon the vesting of restricted stock units. The RSUs were granted on May 20, 2020 and vested over the period from May 20, 2020 through February 13, 2025, as stated in the remarks.

On which market is the PRLB stock in this Form 144 expected to trade?

The Form 144 indicates that the 100 shares of Proto Labs, Inc. common stock are to be sold on the NYSE, with Morgan Stanley Smith Barney LLC serving as the broker.

Does the Form 144 for PRLB report any securities sold in the past 3 months?

No. The section for Securities Sold During The Past 3 Months does not list any prior sales, indicating no reported sales under Rule 144 in that lookback period for this filer.

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	100	7909.00	23921897	09/16/2026	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	05/20/2020	Restricted Stock Units	Issuer			100	05/20/2020	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

Nothing to Report

144: Remarks and Signature

Remarks	The securities to be sold were acquired upon the vesting of restricted stock units during the period of 05/20/2020 through 02/13/2025.
Date of Notice	09/16/2026
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)