WALL CHRISTOPHER K (SVP, CFO and Treasurer) exercised options at BLUELINX HOLDINGS INC.

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

M · 1 exercise

WALL CHRISTOPHER K

Filed: 5/20/2026ACC: 0001104659-26-064502

InsiderWALL CHRISTOPHER KCIK 1820194

→

IssuerBLUELINX HOLDINGS INC.CIK 1301787

Officer· SVP, CFO and Treasurer

Since May 2025

-529.00

Net shares

Net seller

$24.8K

Total sold

Open market trades

0B · 0S

Total transactions

1.79K acquired · 2.32K disposed

Non-Derivative Transactions2

Common Stock

Direct

M · Option Exercise

+1.79K

Price / share

—

Trade value

—

% of position

25.0%

5/19/2026

7.15K→8.94K

Common Stock

Direct

F · Tax Withholding

−529.00

Price / share

$46.86

Trade value

$24.79K

% of position

5.9%

5/19/2026

8.94K→8.41K

Total

Net shares

+1.26K

Net value

-$24.79K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	5/19/2026	M · Option Exercise	+1.79K	—	—	25.0%	7.15K	8.94K
Common Stock Direct	5/19/2026	F · Tax Withholding	−529.00	$46.86	$24.79K	5.9%	8.94K	8.41K
Total			+1.26K		-$24.79K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

1.79K shares

−1.79K

Strike price

Held after

3.58K

Exercisable

—

5/19/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Common Stock1.79K shares	5/19/2026	M · Option Exercise	−1.79K		—	3.58K

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)1

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

5.33K

Shares owned

5.33K

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

5.33K

Owned

5.33K

Security	Underlying	Exercise Price	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Stock		—	—	5.33K	5.33K
Total					5.33K	5.33K