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 · 2 exercises

DEBROCK KIMBERLY ANN

Filed: 6/9/2026ACC: 0001104659-26-071870

InsiderDEBROCK KIMBERLY ANNCIK 1921260

→

IssuerBLUELINX HOLDINGS INC.CIK 1301787

Officer· VP & CHIEF ACCOUNTING OFFICER

Since Sep 2023

+2.40K

Net shares

Net buyer

$12.4K

Total sold

Open market trades

0B · 0S

Total transactions

3.50K acquired · 1.10K disposed

Non-Derivative Transactions4

Common Stock

Direct

M · Option Exercise

+641.00

Price / share

—

Trade value

—

% of position

134.4%

6/6/2026

477.00→1.12K

Common Stock

Direct

F · Tax Withholding

−184.00

Price / share

$50.30

Trade value

$9.26K

% of position

16.5%

6/6/2026

1.12K→934.00

Common Stock

Direct

M · Option Exercise

+214.00

Price / share

—

Trade value

—

% of position

22.9%

6/7/2026

934.00→1.15K

Common Stock

Direct

F · Tax Withholding

−62.00

Price / share

$50.30

Trade value

$3.12K

% of position

5.4%

6/7/2026

1.15K→1.09K

Total

Net shares

+609.00

Net value

-$12.37K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	6/6/2026	M · Option Exercise	+641.00	—	—	134.4%	477.00	1.12K
Common Stock Direct	6/6/2026	F · Tax Withholding	−184.00	$50.30	$9.26K	16.5%	1.12K	934.00
Common Stock Direct	6/7/2026	M · Option Exercise	+214.00	—	—	22.9%	934.00	1.15K
Common Stock Direct	6/7/2026	F · Tax Withholding	−62.00	$50.30	$3.12K	5.4%	1.15K	1.09K
Total			+609.00		-$12.37K

Derivative Transactions3

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

2.65K shares

+2.65K

Strike price

Held after

2.65K

Exercisable

—

6/5/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

641.00 shares

−641.00

Strike price

Held after

1.28K

Exercisable

—

6/6/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

214.00 shares

−214.00

Strike price

Held after

214.00

Exercisable

—

6/7/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock2.65K shares	6/5/2026	A · Award	+2.65K	—	2.65K
Restricted Stock Units Direct	Common Stock641.00 shares	6/6/2026	M · Option Exercise	−641.00	—	1.28K
Restricted Stock Units Direct	Common Stock214.00 shares	6/7/2026	M · Option Exercise	−214.00	—	214.00

Non-Derivative Holdings (Post-Transaction)0

No non-derivative holdings reported

Derivative Holdings (Post-Transaction)2

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

232.00

Shares owned

232.00

Exercise price

Expiration

—

Exercise window

—

Restricted Stock Units

Direct

Underlying security

Common Stock

Underlying shares

349.00

Shares owned

349.00

Exercise price

Expiration

—

Exercise window

—

Total

Underlying

581.00

Owned

581.00

Security	Underlying	Exercise Window	Expiration	Underlying Shares	Shares Owned
Restricted Stock Units Direct	Common Stock	—	—	232.00	232.00
Restricted Stock Units Direct	Common Stock	—	—	349.00	349.00
Total				581.00	581.00