nLIGHT CFO sells 7,715 shares around $41

NLIGHT’s CFO reported selling 7,715 LASR shares, including tax-withholding sales and trades under a pre-established Rule 10b5-1 plan.

Rhea-AI Filing Summary

NLIGHT, INC. (LASR) reported that its Chief Financial Officer, Joseph John Corso, sold a total of 7,715 shares of common stock in early September 2026. On September 3, 2026, 4,191 shares were sold at a weighted average price of $40.69 per share to cover tax withholding obligations related to restricted stock unit vesting, pursuant to a mandated "sell to cover" election by the company and not as a discretionary trade. On September 4, 2026, an additional 3,524 shares were sold at a weighted average price of $41.49 per share in open-market transactions effected under a Rule 10b5-1 trading plan adopted on September 15, 2025.

Insider Trade Summary 10b5-1

Net Seller: 7,715 shares

Net Sell 2 txns

Insider Corso Joseph John

Role Chief Financial Officer

Sold 7,715 shs ($317K)

Type	Security	Shares	Price	Value
Sale	Common Stock F4, F5, F3	3,524	$41.49	$146K
Sale	Common Stock F1, F2, F3	4,191	$40.69	$171K

Holdings After Transaction: Common Stock — 162,200 shares (Direct)

Footnotes (5)

1. F1. This reported sale represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.
2. F2. The reported transaction involves sale transactions from $40.69 to $40.69 per share. The weighted average price per share was $40.69. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.
3. F3. Includes common stock owned and unvested restricted stock units.
4. F4. This reported sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 15, 2025.
5. F5. The reported transaction involves sale transactions from $41.49 to $41.49 per share. The weighted average price per share was $41.49. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

Key Figures

Total shares sold: 7,715 shares Shares sold for tax withholding: 4,191 shares Shares sold under Rule 10b5-1 plan: 3,524 shares +3 more

6 metrics

Total shares sold 7,715 shares Net shares sold by the CFO across reported transactions in September 2026

Shares sold for tax withholding 4,191 shares Sell-to-cover transaction on September 3, 2026 related to RSU vesting

Shares sold under Rule 10b5-1 plan 3,524 shares Open-market sales on September 4, 2026 under trading plan adopted September 15, 2025

Weighted average sale price on September 3, 2026 $40.69 per share Covers the 4,191 shares sold in a range reported as $40.69 to $40.69

Weighted average sale price on September 4, 2026 $41.49 per share Covers the 3,524 shares sold in a range reported as $41.49 to $41.49

Reporting person’s role Chief Financial Officer Position held by Joseph John Corso at NLIGHT, INC.

Key Terms

Rule 10b5-1 trading plan, sell to cover, restricted stock units, weighted average price per share

4 terms

Rule 10b5-1 trading plan regulatory

"sale was effected pursuant to a Rule 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

sell to cover financial

"mandated by the Issuer's election to require a "sell to cover""

Sell to cover is when a person who receives company stock through options or awards sells just enough shares immediately to pay required taxes, exercise costs, or fees, keeping the rest. Think of it like cashing part of a bonus to cover the tax bill so you can keep the remainder. For investors, it can create predictable small selling pressure and slightly change the number of shares actually held by insiders without increasing long‑term dilution.

restricted stock units financial

"in connection with the vesting and settlement 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.

weighted average price per share financial

"The weighted average price per share was $40.69."

FAQ

How many NLIGHT (LASR) shares did the CFO sell in this Form 4?

The Chief Financial Officer, Joseph John Corso, reported selling a total of 7,715 shares of NLIGHT common stock, consisting of 4,191 shares on September 3, 2026 and 3,524 shares on September 4, 2026.

At what prices were the NLIGHT (LASR) shares sold by the CFO?

The filing reports weighted average sale prices of $40.69 per share for the 4,191 shares sold on September 3, 2026, and $41.49 per share for the 3,524 shares sold on September 4, 2026.

Were any of the NLIGHT (LASR) CFO’s sales related to tax withholding?

Yes. The sale of 4,191 shares on September 3, 2026 represents shares sold to cover tax withholding obligations upon vesting and settlement of restricted stock units and is described as a mandated "sell to cover" transaction, not a discretionary trade.

Did the NLIGHT (LASR) CFO sell shares under a Rule 10b5-1 trading plan?

Yes. The sale of 3,524 shares on September 4, 2026 was effected under a Rule 10b5-1 trading plan that Joseph John Corso adopted on September 15, 2025, according to the footnotes.

What role does the reporting person hold at NLIGHT (LASR)?

The reporting person, Joseph John Corso, is identified as the Chief Financial Officer of NLIGHT, INC. in the Form 4.

Does the Form 4 indicate how many NLIGHT (LASR) shares the CFO owns after these sales?

The Form 4 notes that post-transaction holdings include common stock and unvested restricted stock units, but it does not state a specific number of shares held after these reported sales.

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

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Available on EDGAR 09/08/2026 - 06:00 PM Accepted by SEC EDGAR 09/08/2026 - 05:59 PM Learn about SEC filing dates

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).

X

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^*

Corso Joseph John

(Last) (First) (Middle)

4637 NW 18TH AVENUE

(Street)

CAMAS WASHINGTON 98607

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NLIGHT, INC. [ LASR ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2026

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	09/03/2026		S		4,191(1)	D	$40.69(2)	165,724(3)	D
Common Stock	09/04/2026		S		3,524(4)	D	$41.49(5)	162,200(3)	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:

1. This reported sale represents shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. The sale is mandated by the Issuer's election to require the satisfaction of tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person.

2. The reported transaction involves sale transactions from $40.69 to $40.69 per share. The weighted average price per share was $40.69. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

3. Includes common stock owned and unvested restricted stock units.

4. This reported sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 15, 2025.

5. The reported transaction involves sale transactions from $41.49 to $41.49 per share. The weighted average price per share was $41.49. The Reporting Person undertakes to provide upon request by the SEC staff, the Issuer or a security holder of the Issuer, information regarding the number of shares sold at each separate price.

Remarks:

	/s/ Joseph Corso, as attorney-in-fact	09/08/2026
	** 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)