WHITEHEAD WARREN

PrivateCIK: 1761449

Location

TORONTO, A6

WHITEHEAD WARREN reported 1 transaction at APTOSE BIOSCIENCES INC.

Review the transaction codes below to understand the nature of each event.

WHITEHEAD WARREN

Filed: 7/1/2026ACC: 0000912282-26-000900

InsiderWHITEHEAD WARRENCIK 1761449

→

IssuerAPTOSE BIOSCIENCES INC.CIK 882361

Director

Since Dec 2018

-548.87K

Net shares

Net seller

$56.76

Total sold

0

Open market trades

0B · 0S

10

Total transactions

548.87K disposed

Non-Derivative Transactions1

Common Shares

Direct

D · Disposition

Shares

−33.00

Price / share

$1.72

Trade value

$56.76

% of position

New position

6/30/2026

33.00→0.00

Total

Net shares

−33.00

Net value

-$56.76

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Common Shares Direct	6/30/2026	D · Disposition	−33.00	$1.72	$56.76	New position	33.00	0.00
Total			−33.00		-$56.76

Derivative Transactions9

Director Stock Option (Right to Buy)

Direct

D · Disposition

Converts to

Common Shares

3.33K shares

Shares

−3.33K

Strike price

1.97

Held after

0.00

Exercisable

—

6/30/2026

Director Option Grant

Direct

D · Disposition

Converts to

Common Shares

100K shares

Shares

−100K

Strike price

0.66

Held after

0.00

Exercisable

—

6/30/2026

Director Option Grant

Direct

D · Disposition

Converts to

Common Shares

50K shares

Shares

−50K

Strike price

1.39

Held after

0.00

Exercisable

—

6/30/2026

Director Option Grant

Direct

D · Disposition

Converts to

Common Shares

50K shares

Shares

−50K

Strike price

1.39

Held after

0.00

Exercisable

—

6/30/2026

Director Stock Option (Right to Buy)

Direct

D · Disposition

Converts to

Common Shares

50K shares

Shares

−50K

Strike price

4.38

Held after

0.00

Exercisable

—

6/30/2026

Director Option Grant

Direct

D · Disposition

Converts to

Common Shares

50K shares

Shares

−50K

Strike price

5.15

Held after

0.00

Exercisable

—

6/30/2026

Director Option Grant

Direct

D · Disposition

Converts to

Common Shares

152.50K shares

Shares

−152.50K

Strike price

6.91

Held after

0.00

Exercisable

—

6/30/2026

Stock Options (Right to Buy)

Direct

D · Disposition

Converts to

Common Shares

40K shares

Shares

−40K

Strike price

1.91

Held after

0.00

Exercisable

—

6/30/2026

Director Stock Option (Right to Buy)

Direct

D · Disposition

Converts to

Common Shares

53K shares

Shares

−53K

Strike price

3.52

Held after

0.00

Exercisable

—

6/30/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Director Stock Option (Right to Buy) Direct	Common Shares3.33K shares	6/30/2026	D · Disposition	−3.33K	1.97	—	0.00
Director Option Grant Direct	Common Shares100K shares	6/30/2026	D · Disposition	−100K	0.66	—	0.00
Director Option Grant Direct	Common Shares50K shares	6/30/2026	D · Disposition	−50K	1.39	—	0.00
Director Option Grant Direct	Common Shares50K shares	6/30/2026	D · Disposition	−50K	1.39	—	0.00
Director Stock Option (Right to Buy) Direct	Common Shares50K shares	6/30/2026	D · Disposition	−50K	4.38	—	0.00
Director Option Grant Direct	Common Shares50K shares	6/30/2026	D · Disposition	−50K	5.15	—	0.00
Director Option Grant Direct	Common Shares152.50K shares	6/30/2026	D · Disposition	−152.50K	6.91	—	0.00
Stock Options (Right to Buy) Direct	Common Shares40K shares	6/30/2026	D · Disposition	−40K	1.91	—	0.00
Director Stock Option (Right to Buy) Direct	Common Shares53K shares	6/30/2026	D · Disposition	−53K	3.52	—	0.00