APOSTOLOU STEPHANIE L (General Counsel & Secretary) received a stock award from KOPPERS HOLDINGS INC.

Compensation award — not an open‑market transaction. Less informative as a directional signal.

A · 1 award

APOSTOLOU STEPHANIE L

Filed: 1/6/2026ACC: 0001806249-26-000002

InsiderAPOSTOLOU STEPHANIE LCIK 1806249

→

IssuerKOPPERS HOLDINGS INC.CIK 1315257

Officer· General Counsel & Secretary

Since Mar 2020

+6.65K

Net shares

Net buyer

$155.0K

Total sold

Open market trades

0B · 0S

Total transactions

17.31K acquired · 10.66K disposed

Non-Derivative Transactions4

Common Stock

Direct

A · Award

+9.88K

Price / share

—

Trade value

—

% of position

19.8%

1/5/2026

49.88K→59.75K

Common Stock

Direct

M · Option Exercise

+4.67K

Price / share

—

Trade value

—

% of position

7.8%

1/5/2026

59.75K→64.42K

Common Stock

Direct

M · Option Exercise

+240.00

Price / share

—

Trade value

—

% of position

0.4%

1/5/2026

64.42K→64.66K

Common Stock

Direct

F · Tax Withholding

−5.76K

Price / share

$26.93

Trade value

$155.04K

% of position

8.9%

1/5/2026

64.66K→58.90K

Total

Net shares

+9.03K

Net value

-$155.04K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Stock Direct	1/5/2026	A · Award	+9.88K	—	—	19.8%	49.88K	59.75K
Common Stock Direct	1/5/2026	M · Option Exercise	+4.67K	—	—	7.8%	59.75K	64.42K
Common Stock Direct	1/5/2026	M · Option Exercise	+240.00	—	—	0.4%	64.42K	64.66K
Common Stock Direct	1/5/2026	F · Tax Withholding	−5.76K	$26.93	$155.04K	8.9%	64.66K	58.90K
Total			+9.03K		-$155.04K

Derivative Transactions5

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

1.15K shares

+1.15K

Strike price

Held after

4.67K

Exercisable

—

1/2/2026

Restricted Stock Units

Direct

A · Award

Converts to

Common Stock

1.33K shares

+1.33K

Strike price

Held after

1.33K

Exercisable

—

1/2/2026

Dividend Equivalent Rights

Direct

A · Award

Converts to

Common Stock

39.00 shares

+39.00

Strike price

Held after

388.00

Exercisable

—

1/2/2026

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Common Stock

4.67K shares

−4.67K

Strike price

Held after

0.00

Exercisable

—

1/5/2026

Dividend Equivalent Rights

Direct

M · Option Exercise

Converts to

Common Stock

240.00 shares

−240.00

Strike price

Held after

148.00

Exercisable

—

1/5/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Restricted Stock Units Direct	Common Stock1.15K shares	1/2/2026	A · Award	+1.15K	—	4.67K
Restricted Stock Units Direct	Common Stock1.33K shares	1/2/2026	A · Award	+1.33K	—	1.33K
Dividend Equivalent Rights Direct	Common Stock39.00 shares	1/2/2026	A · Award	+39.00	—	388.00
Restricted Stock Units Direct	Common Stock4.67K shares	1/5/2026	M · Option Exercise	−4.67K	—	0.00
Dividend Equivalent Rights Direct	Common Stock240.00 shares	1/5/2026	M · Option Exercise	−240.00	—	148.00