Proto Labs (PRLB) CEO uses 1,247 shares to cover tax obligation

Rhea-AI Filing Summary

Proto Labs Inc President and CEO Krishna Suresh reported a tax-related share disposition. On May 23, 2026, 1,247 shares of Common Stock were used in a tax-withholding disposition at $71.36 per share, a method of paying tax liability with shares rather than cash. After this non‑market transaction, Suresh directly holds 30,147 shares of Proto Labs common stock.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Krishna Suresh

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	1,247	$71.36	$89K

Holdings After Transaction: Common Stock — 30,147 shares (Direct, null)

Footnotes (1)

Key Figures

Tax-withholding shares: 1,247 shares Price per share: $71.36 per share Post-transaction holdings: 30,147 shares +1 more

4 metrics

Tax-withholding shares 1,247 shares Common Stock used in tax-withholding disposition on May 23, 2026

Price per share $71.36 per share Valuation used for the tax-withholding disposition

Post-transaction holdings 30,147 shares Common Stock directly held by Krishna Suresh after transaction

Tax-withholding transactions 1 transaction, 1,247 shares Aggregate from transactionSummary for this Form 4

Key Terms

tax-withholding disposition, Payment of exercise price or tax liability by delivering securities, Common Stock, Form 4

4 terms

tax-withholding disposition financial

"transaction_action: tax-withholding disposition"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Payment of exercise price or tax liability by delivering securities financial

"transaction_code_description: Payment of exercise price or tax liability by delivering securities"

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"INSIDER FILING DATA (Form 4)"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

Form 4 Insider Transactions: What Each Field Means →

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^*

Krishna Suresh

(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
X	Officer (give title below)		Other (specify below)
	President and CEO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/23/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/23/2026		F		1,247	D	$71.36	30,147	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ W. Morgan Burns, Attorney-in-Fact	05/27/2026
	** 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)

FAQ

What insider transaction did Proto Labs (PRLB) report for Krishna Suresh?

Proto Labs President and CEO Krishna Suresh reported a tax-withholding disposition of 1,247 shares of Common Stock. The shares were used to satisfy tax obligations rather than through an open-market trade, and he continues to hold 30,147 shares directly afterward.

Was the Proto Labs (PRLB) CEO’s Form 4 transaction a sale of shares?

The transaction was classified as a tax-withholding disposition, not an open-market sale. Shares were delivered to cover tax liability associated with equity compensation, meaning it was a mechanical tax payment rather than a discretionary buy-or-sell decision in the market.

How many Proto Labs (PRLB) shares did the CEO use for tax withholding?

Krishna Suresh used 1,247 shares of Proto Labs Common Stock in a tax-withholding disposition. The shares were valued at $71.36 each for this purpose, reflecting the price per share used in calculating the equity-based tax payment obligation.

What is Krishna Suresh’s Proto Labs (PRLB) shareholding after this transaction?

Following the tax-withholding disposition, Krishna Suresh directly holds 30,147 shares of Proto Labs Common Stock. This figure reflects his remaining direct ownership position after 1,247 shares were applied toward satisfying his equity-related tax liability.

What does a tax-withholding disposition mean for Proto Labs (PRLB) insiders?

A tax-withholding disposition occurs when an insider delivers shares to pay taxes on equity awards. Instead of paying cash, a portion of vested shares is withheld, reducing net shares received but simplifying tax settlement. It is typically considered an administrative, non-market transaction.