SEC FORM 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person ^*

Whitehead Warren

(Last)

(First)

(Middle)

C/O APTOSE BIOSCIENCES INC.

251 CONSUMERS ROAD, SUITE 1105

(Street)

TORONTO

M2J 4R3

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Aptose Biosciences Inc. [ APTO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
	Officer (give title below)	Other (specify below)
FORMER DIRECTOR

3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Shares	06/30/2026		D⁽¹⁾		33	D	$ 1.72 ⁽²⁾	0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Director Stock Option (Right to Buy)	$ 1.97	06/30/2026		D⁽¹⁾			3,333	⁽³⁾	02/05/2034	Common Shares	3,333	$ 0	0	D
Director Option Grant	$ 0.66	06/30/2026		D⁽¹⁾			100,000	⁽³⁾	01/19/2033	Common Shares	100,000	$ 0	0	D
Director Option Grant	$ 1.39	06/30/2026		D⁽¹⁾			50,000	⁽³⁾	01/17/2032	Common Shares	50,000	$ 0	0	D
Director Option Grant	$ 1.39	06/30/2026		D⁽¹⁾			50,000	⁽³⁾	01/17/2032	Common Shares	50,000	$ 0	0	D
Director Stock Option (Right to Buy)	$ 4.38	06/30/2026		D⁽¹⁾			50,000	⁽³⁾	01/04/2031	Common Shares	50,000	$ 0	0	D
Director Option Grant	$ 5.15	06/30/2026		D⁽¹⁾			50,000	⁽³⁾	03/10/2030	Common Shares	50,000	$ 0	0	D
Director Option Grant	$ 6.91	06/30/2026		D⁽¹⁾			152,500	⁽³⁾	01/30/2030	Common Shares	152,500	$ 0	0	D
Stock Options (Right to Buy)	$ 1.91	06/30/2026		D⁽¹⁾			40,000	⁽³⁾	01/02/2029	Common Shares	40,000	$ 0	0	D
Director Stock Option (Right to Buy)	$ 3.52	06/30/2026		D⁽¹⁾			53,000	⁽³⁾	01/19/2028	Common Shares	53,000	$ 0	0	D

Explanation of Responses:

1. Disposed of pursuant to a board, shareholder and court-approved business arrangement agreement between the Issuer and Hammi Pharmaceuticals Co. Ltd., a South Korean corporation ("Hammi") whereby a subsidiary of Hammi acquired all outstanding shares of the Issuer at a price of C$2.41 per share.

2. Converted from Canadian price of C$2.41 per share using an exchange rate of C$1.4 = US$1.00.

3. Options vest 50% on the first anniversary of grant date; remaining options vest 1/3 annually beginning on the second anniversary of the grant date.

Remarks:

TOTAL OPTIONS AND OPTION EXERCISE PRICE SUBJECT TO ADJUSTMENT AS A RESULT OF THE ISSUER'S 1:30 REVERSE STOCK SPLIT ON 2/25/25 AND 1:15 REVERSE STOCK SPLIT ON 6/6/2023

	/s/ Warren Whitehead	07/01/2026
	** Signature of Reporting Person	Date
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