Kimberly Ann DeBrock - Oct 18, 2025 Form 4 Insider Report for BlueLinx Holdings Inc. (BXC)

Role: VP & Chief Accounting Officer
Signature: /s/ Christin Lumpkin, as attorney-in-fact for Kimberly Ann DeBrock
Stock symbol: BXC
Transactions as of: Oct 18, 2025
Transactions value $: -$4,840
Form type: 4
Date filed: 10/21/2025, 02:37 PM
Previous filing: Jun 10, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
DeBrock Kimberly Ann	VP & Chief Accounting Officer	1950 SPECTRUM CIRCLE, MARIETTA	/s/ Christin Lumpkin, as attorney-in-fact for Kimberly Ann DeBrock	2025-10-21	0001921260

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	BXC	Common Stock	Options Exercise		+232	+73.89%		546	Oct 18, 2025	Direct	F1, F2
transaction	BXC	Common Stock	Tax liability	-$4.84K	-69	-12.64%	$70.15	477	Oct 18, 2025	Direct	F3

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	BXC	Restricted Stock Units	Options Exercise	$0	-232	-50%	$0.00	232	Oct 18, 2025	Common Stock	232		Direct	F1, F2
holding	BXC	Restricted Stock Unit						1.92K	Oct 18, 2025	Common Stock	1.92K		Direct	F2, F4
holding	BXC	Restricted Stock Unit						349	Oct 18, 2025	Common Stock	349		Direct	F2, F5
holding	BXC	Restricted Stock Unit						428	Oct 18, 2025	Common Stock	428		Direct	F2, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the conversion of restricted stock units that vested on October 18, 2025. These are time based restricted stock units that vest in three equal annual installments, with the first vesting on October 18, 2024.
F2	Each restricted stock unit represents a contingent right to receive one share of BlueLinx Holdings Inc. common stock.
F3	These shares were withheld to cover tax withholding obligations when 232 time-based restricted stock units vested on October 18, 2025.
F4	These are time-based restricted stock units that vest in three equal annual installments commencing on June 6, 2026. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.
F5	These are time-based restricted stock units that vest on June 6, 2028. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.
F6	These are time-based restricted stock units that vest in three equal installments commencing on June 7, 2025. Vested shares will be delivered to the reporting person no later than 30 days after each vesting date.