DEBROCK KIMBERLY ANN (VP & CHIEF ACCOUNTING OFFICER) exercised options at BLUELINX HOLDINGS INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 1 exercise

DEBROCK KIMBERLY ANN

Filed: 10/20/2026ACC: 0001104659-26-117399

InsiderDEBROCK KIMBERLY ANNCIK 1921260

→

IssuerBLUELINX HOLDINGS INC.CIK 1301787

Officer· VP & CHIEF ACCOUNTING OFFICER

Since Sep 2023

-69.00

Net shares

Net seller

$5.1K

Total sold

Open market trades

0B · 0S

Total transactions

232.00 acquired · 301.00 disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+232.00

Price / share

—

Trade value

—

% of position

21.4%

10/18/2026

1.09K→1.32K

Common Stock

Direct

F · Tax Withholding

−69.00

Price / share

$73.62

Trade value

$5.08K

% of position

5.2%

10/18/2026

1.32K→1.25K

Total

Net shares

+163.00

Net value

-$5.08K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	10/18/2026	M · Option Exercise	+232.00	—	—	21.4%	1.09K	1.32K
Common Stock Direct	10/18/2026	F · Tax Withholding	−69.00	$73.62	$5.08K	5.2%	1.32K	1.25K
Total			+163.00		-$5.08K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

232.00 shares

−232.00

Strike price

Held after

0.00

Exercisable

—

10/18/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock232.00 shares	10/18/2026	M · Option Exercise	−232.00		—	0.00

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)4

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

349.00

Shares owned

349.00

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

1.28K

Shares owned

1.28K

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

2.65K

Shares owned

2.65K

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

214.00

Shares owned

214.00

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

4.49K

Owned

4.49K

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Stock	—	—	349.00	349.00
Restricted Stock Units Direct	Common Stock	—	—	1.28K	1.28K
Restricted Stock Units Direct	Common Stock	—	—	2.65K	2.65K
Restricted Stock Units Direct	Common Stock	—	—	214.00	214.00
Total				4.49K	4.49K