Proto Labs director awarded 2,210 stock units

Proto Labs Inc director Moonhie Chin acquired 2,210 shares of common stock as a stock award.

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Form Type

Rhea-AI Filing Summary

Proto Labs Inc director Moonhie Chin acquired 2,210 shares of common stock as a stock award. The Form 4 shows this equity grant at a price of $0.0000 per share on May 19, 2026, increasing Chin’s direct holdings to 22,306 shares.

The footnote explains these are deferred stock units that vest in full on the earlier of the first anniversary of the grant date or the Company’s 2027 Annual Meeting of Shareholders, and must be retained until Chin’s service on the Board of Directors ends.

Insider Trade Summary

Grant/Award: 2,210 shares

Grant/Award 1 txn

Insider Chin Moonhie

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,210	$0.00	$0.00

Holdings After Transaction: Common Stock — 22,306 shares (Direct)

Footnotes (1)

F1. Deferred stock units that vest in full on the earlier of the first anniversary of the grant date or the date of the 2027 Annual Meeting of Shareholders but must be retained until the reporting person's service on the Company's Board of Directors ends.

Key Figures

Stock grant size: 2,210 shares Grant price: $0.0000 per share Holdings after transaction: 22,306 shares +1 more

4 metrics

Stock grant size 2,210 shares Deferred stock units granted on May 19, 2026

Grant price $0.0000 per share Equity award, not market purchase

Holdings after transaction 22,306 shares Direct ownership following grant

Vesting milestone year 2027 Earlier of first anniversary or 2027 Annual Meeting

Key Terms

Deferred stock units, Annual Meeting of Shareholders, Board of Directors

3 terms

Deferred stock units financial

"Deferred stock units that vest in full on the earlier of the first anniversary"

Deferred stock units are promises from a company to give an employee shares of stock at a future date, often after certain conditions are met or after leaving the company. They function like a form of delayed compensation, allowing employees to earn shares over time. For investors, they represent potential future ownership in the company, but do not provide immediate voting rights or dividends until the shares are actually received.

Annual Meeting of Shareholders regulatory

"on the earlier of the first anniversary of the grant date or the date of the 2027 Annual Meeting of Shareholders"

A yearly gathering where a company’s owners (shareholders) vote on key items like electing the board, approving executive pay, and ratifying auditors, and receive updates on performance and strategy. Think of it as an annual town hall for owners: it matters to investors because outcomes and disclosures can affect leadership, corporate direction, dividend and governance policies, and therefore the company’s risk and potential return.

Board of Directors regulatory

"must be retained until the reporting person's service on the Company's Board of Directors ends"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

FAQ

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What did Proto Labs (PRLB) director Moonhie Chin report in this Form 4?

Director Moonhie Chin reported receiving 2,210 shares of Proto Labs common stock as a stock award. The grant was priced at $0.0000 per share and increased Chin’s direct holdings to 22,306 shares following the transaction on May 19, 2026.

Was the Proto Labs (PRLB) Form 4 transaction a market purchase or a stock grant?

The transaction was a stock grant, not an open-market purchase or sale. The filing labels the code as an award acquisition, with 2,210 shares granted at $0.0000 per share as compensation rather than being bought in the market.

How many Proto Labs (PRLB) shares does Moonhie Chin hold after this grant?

After the reported award, Moonhie Chin directly holds 22,306 shares of Proto Labs common stock. This total reflects the addition of 2,210 shares granted on May 19, 2026, as disclosed in the Form 4 filing.

What are the vesting terms of Moonhie Chin’s Proto Labs deferred stock units?

The deferred stock units vest in full on the earlier of the first anniversary of the grant date or the 2027 Annual Meeting of Shareholders. They must be retained until Moonhie Chin’s service on Proto Labs’ Board of Directors ends, according to the footnote.

Does Moonhie Chin have to hold the Proto Labs shares after vesting?

Yes. The footnote states the deferred stock units must be retained until Moonhie Chin’s service on the Proto Labs Board of Directors ends. This requirement applies even though the units vest by the first anniversary or the 2027 Annual Meeting of Shareholders.

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Accepted by SEC EDGAR 05/21/2026 - 04:06 PM EDT

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Chin Moonhie

(Last)

(First)

(Middle)

5540 PIONEER CREEK DRIVE

(Street)

MAPLE PLAIN

MINNESOTA

55359

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Proto Labs Inc [ PRLB ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/19/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	05/19/2026		A		2,210⁽¹⁾	A	$0	22,306	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Deferred stock units that vest in full on the earlier of the first anniversary of the grant date or the date of the 2027 Annual Meeting of Shareholders but must be retained until the reporting person's service on the Company's Board of Directors ends.

Remarks:

	/s/ W. Morgan Burns, Attorney-in-Fact	05/21/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR