[Form 4] BlueLinx Holdings Inc. Insider Trading Activity

BlueLinx Holdings Inc. director Lewis B. Mitchell reported equity compensation activity and a vesting event.

Rhea-AI Filing Summary

BlueLinx Holdings Inc. director Lewis B. Mitchell reported equity compensation activity and a vesting event. On May 19, 2026, 2,074 restricted stock units vested and were converted into the same number of shares of Common Stock, increasing his directly held shares to 38,451. The filing notes that vested shares will be delivered to him within 30 days of vesting.

Separately, on May 18, 2026, Mitchell received a grant of 2,749 restricted stock units, each representing a contingent right to one common share. These RSUs vest on the first anniversary of the grant date, with shares to be delivered within 30 days after vesting.

Insider Trade Summary

2,074 shares exercised/converted

Exercise 3 txns

Insider Lewis Mitchell B

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	2,074	$0.00	$0.00
Exercise	Common Stock	2,074	$0.00	$0.00
Grant/Award	Restricted Stock Units	2,749	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 2,749 contracts (Direct); Common Stock — 38,451 shares (Direct)

Footnotes (3)

1. F1. Represents the conversion of restricted stock units that vested on May 19, 2026. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date.
2. F2. Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.
3. F3. The restricted stock units vest on the first anniversary date of the date of grant. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date.

Key Figures

RSUs vested and converted: 2,074 shares New RSU grant: 2,749 units Shares held after transactions: 38,451 shares +1 more

4 metrics

RSUs vested and converted 2,074 shares Restricted stock units vesting into common stock on May 19, 2026

New RSU grant 2,749 units Restricted stock units granted on May 18, 2026

Shares held after transactions 38,451 shares Total common stock directly owned after May 19, 2026

RSU-to-share ratio 1:1 Each RSU represents a contingent right to one common share

Key Terms

Restricted Stock Units, contingent right, derivative security, vest

4 terms

Restricted Stock Units financial

"Represents the conversion of restricted stock units that vested on May 19, 2026."

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.

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock."

derivative security financial

"Exercise or conversion of derivative security"

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

vest financial

"The restricted stock units vest on the first anniversary date of the date of grant."

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

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

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Accepted by SEC EDGAR 05/20/2026 - 04:03 PM EDT 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).

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^*

Lewis Mitchell B

(Last) (First) (Middle)

1950 SPECTRUM CIRCLE

(Street)

MARIETTA GEORGIA 30067

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
BlueLinx Holdings Inc. [ BXC ]

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)
05/18/2026

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	05/19/2026		M		2,074(1)	A	(2)	38,451	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
Restricted Stock Units	(2)	05/18/2026		A		2,749		(3)	(3)	Common Stock	2,749	$0	2,749	D
Restricted Stock Units	(2)	05/19/2026		M			2,074	(1)	(1)	Common Stock	2,074	$0	0	D

Explanation of Responses:

1. Represents the conversion of restricted stock units that vested on May 19, 2026. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date.

2. Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.

3. The restricted stock units vest on the first anniversary date of the date of grant. Vested shares will be delivered to the reporting person not later than 30 days after the vesting date.

	/s/ Christin Lumpkin as attorney-in-fact for Mitchell B. Lewis	05/20/2026
	** 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)