[Form 4] nLIGHT, Inc. Insider Trading Activity

Rhea-AI Filing Summary

nLIGHT, Inc. CFO Joseph John Corso sold a total of 7,700 shares of common stock in two transactions on 09/04/2025 and 09/05/2025 at prices of $29.14 and $29.73 per share respectively. The Form 4 shows the 09/04/2025 sale of 4,112 shares was executed to satisfy tax withholding tied to the vesting and settlement of restricted stock units under the issuer's mandatory "sell to cover" election, while the 09/05/2025 sale of 3,588 shares was effected under a Rule 10b5-1 trading plan adopted by the reporting person on 03/14/2025. Following these transactions the reporting person beneficially owned 265,418 shares, which includes vested common stock and unvested restricted stock units.

Positive

• Sales were executed under documented mechanisms: one was a mandatory "sell to cover" for RSU tax withholding and one under a Rule 10b5-1 plan.
• Form 4 discloses specifics: transaction dates, share counts (4,112 and 3,588), and prices ($29.14 and $29.73), supporting transparency.
• Reporting person retains significant ownership: 265,418 shares beneficially owned following the transactions, inclusive of unvested RSUs.

Negative

• None.

Insights

Corporate Governance Expert

TL;DR: Insider sales appear procedural and compliant with company policy and a pre-established 10b5-1 plan.

The reporting person is the Chief Financial Officer and the Form 4 discloses two sales: one mandated "sell to cover" to satisfy tax withholding upon RSU vesting and one executed pursuant to a Rule 10b5-1 plan. These mechanics reduce concerns about opportunistic timing because the issuer's withholding election and an established trading plan are documented. The transactions are routine for executive compensation settlement and do not indicate a change in control or a broader shift in insider ownership policy.

Securities Analyst

TL;DR: Total insider share reduction is modest (7,700 shares) and likely immaterial to company valuations.

The reported sales totaled 7,700 shares at prices near $29. Aggregate beneficial ownership after the transactions remained at 265,418 shares including unvested RSUs. Because one sale was to cover taxes and the other executed under a documented 10b5-1 plan, these dispositions are operational rather than signal-driven. For investors, the filing documents compliance with SEC reporting requirements and clarifies the mechanics behind the share reductions.

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 WA 98607

(City) (State) (Zip)

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

3. Date of Earliest Transaction (Month/Day/Year)
09/04/2025

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

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

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

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	09/04/2025		S		4,112(1)	D	$29.14	269,006(2)	D
Common Stock	09/05/2025		S		3,588(3)	D	$29.73	265,418(2)	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. The sale reported on this Form 4 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. Includes common stock owned and unvested restricted stock units.

3. The sale reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 14, 2025.

Remarks:

	/s/ Julie Dimmick, as attorney-in-fact	09/08/2025
	** 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.

FAQ

How many shares did nLIGHT (LASR) CFO Joseph John Corso sell?

The CFO sold a total of 7,700 shares: 4,112 shares on 09/04/2025 and 3,588 shares on 09/05/2025.

Why were the 09/04/2025 shares sold by the reporting person?

The 4,112-share sale on 09/04/2025 was to satisfy tax withholding obligations related to the vesting and settlement of restricted stock units under the issuer's mandatory "sell to cover" election.

Was any sale executed under a Rule 10b5-1 plan?

Yes. The 3,588-share sale on 09/05/2025 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on 03/14/2025.

What was the price per share for the reported transactions?

Reported prices were $29.14 (09/04/2025) and $29.73 (09/05/2025).

How many shares does the reporting person beneficially own after these transactions?

265,418 shares beneficially owned following the reported transactions, which includes common stock and unvested restricted stock units.