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Aptose Biosciences (APTOF) former CMO disposes all shares and options in Hammi acquisition

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Aptose Biosciences Inc. former SVP and Chief Medical Officer Rafael Bejar reported the disposition of his remaining equity stake in connection with a completed acquisition of Aptose by Hammi Pharmaceuticals Co. Inc. A subsidiary of Hammi acquired all outstanding Aptose shares at C$2.41 per share, which the filing converts using an exchange rate of C$1.4 = US$1.00, consistent with a reported common share price of about $1.72 per share.

Bejar disposed of 244 common shares at $1.72 per share and multiple employee and performance stock option awards, each recorded as a Disposition to issuer. After these transactions, the filing shows he holds 0 common shares and no remaining stock options, fully exiting his reported ownership position following the transaction.

Positive

  • None.

Negative

  • None.
Insider Bejar Rafael
Role null
Type Security Shares Price Value
Disposition Employee Stock Option (Right to Buy) 35,000 $0.00 --
Disposition Employee Stock Option 200,000 $0.00 --
Disposition Performance Stock Option 400,000 $0.00 --
Disposition Employee Stock Option (Right to Buy) 343,000 $0.00 --
Disposition Employee Option Grant 200,000 $0.00 --
Disposition Employee Stock Option (Right to Buy) 400,000 $0.00 --
Disposition Common Shares 244 $1.72 $419.68
Holdings After Transaction: Employee Stock Option (Right to Buy) — 0 shares (Direct, null); Employee Stock Option — 0 shares (Direct, null); Performance Stock Option — 0 shares (Direct, null); Employee Option Grant — 0 shares (Direct, null); Common Shares — 0 shares (Direct, null)
Footnotes (1)
  1. Disposed of pursuant to a board, shareholder and court-approved business arrangement agreement between the Issuer and Hammi Pharmaceuticals Co. Inc., 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. Converted from Canadian price of C$2.41 per share using an exchange rate of C$1.4 = US$1.00. 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. Performance stock options subject to specific performance criteria.
Common shares disposed 244 shares Common Shares at $1.72 per share on 2026-06-30
Common share price $1.72 per share Disposition price for 244 Common Shares
Canadian acquisition price C$2.41 per share Hammi acquisition price for all outstanding Aptose shares
FX rate used C$1.4 = US$1.00 Conversion rate for C$2.41 per share to U.S. dollars
Option grant disposed 400,000 option shares Employee Stock Option, $5.67 exercise price, expires 2030-12-31
Performance options disposed 400,000 option shares Performance Stock Option, $2.35 exercise price, expires 2031-08-19
Post-transaction holdings 0 shares Total common shares following all reported transactions
Disposition to issuer financial
"each transaction is described with the code D and the phrase "Disposition to issuer""
Employee Stock Option financial
"Security titles include "Employee Stock Option (Right to Buy)" and "Employee Stock Option""
An employee stock option is a promise that lets a worker buy company shares later at a predetermined price, often after they stay for a certain period or meet performance goals — think of it like a coupon that locks in today's price for a future purchase. It matters to investors because options align employees’ incentives with company performance, can increase the number of shares outstanding (dilution) when exercised, and represent a compensation cost that affects reported profits and shareholder value.
Performance stock options financial
"A footnote states "Performance stock options subject to specific performance criteria.""
business arrangement agreement financial
"Footnote describes a "business arrangement agreement between the Issuer and Hammi Pharmaceuticals Co. Inc.""
exercise price financial
"Derivative entries list a "conversion_or_exercise_price" such as 5.6700 and 2.3500"
The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.
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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
X
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Bejar Rafael

(Last)(First)(Middle)
C/O APTOSE BIOSCIENCES INC.
251 CONSUMERS ROAD, SUITE 1105

(Street)
TORONTOM2J 4R3

(City)(State)(Zip)

ONTARIO, CANADA

(Country)
2. Issuer Name and Ticker or Trading Symbol
Aptose Biosciences Inc. [ APTO ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
Officer (give title below)XOther (specify below)
Former SVP&Ch Medical Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/30/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

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)
CodeVAmount(A) or (D)Price
Common Shares06/30/2026D(1)244D$1.72(2)0D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Employee Stock Option (Right to Buy)$206/30/2026D(1)35,000 (3)02/05/2034Common Shares35,000$00D
Employee Stock Option$0.6606/30/2026D(1)200,000 (3)01/19/2033Common Shares200,000$00D
Performance Stock Option$2.3506/30/2026D(1)400,000 (4)08/19/2031Common Shares400,000$00D
Employee Stock Option (Right to Buy)$4.3706/30/2026D(1)343,000 (3)01/04/2031Common Shares343,000$00D
Employee Option Grant$6.9106/30/2026D(1)200,000 (3)01/30/2030Common Shares200,000$00D
Employee Stock Option (Right to Buy)$5.6706/30/2026D(1)400,000 (3)12/31/2030Common Shares400,000$00D
Explanation of Responses:
1. Disposed of pursuant to a board, shareholder and court-approved business arrangement agreement between the Issuer and Hammi Pharmaceuticals Co. Inc., 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.
4. Performance stock options subject to specific performance criteria.
Remarks:
TOTAL OPTIONS AND OPTION EXERCISE PRICE SUBJECT TO ADJUSTMENT AS A RESULT OF HTE ISSUER'S 1:30 REVERSE STOCK SPLIT ON 2/26/25 AND ISSUER'S 1:15 REVERSE STOCK SPLIT ON 6/6/23
/s/ Rafael Bejar07/01/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What did Rafael Bejar report in his Aptose Biosciences (APTOF) Form 4?

Rafael Bejar reported disposing of all his Aptose equity interests. The filing shows sales of 244 common shares and multiple stock option grants as dispositions to the issuer following Hammi Pharmaceuticals’ acquisition of all outstanding Aptose shares.

How many Aptose Biosciences common shares did Rafael Bejar dispose of?

He disposed of 244 Aptose common shares. These shares were reported at a transaction price of about $1.72 per share, aligning with the Canadian acquisition price of C$2.41 converted using an exchange rate of C$1.4 = US$1.00.

What happened to Rafael Bejar’s Aptose stock options in this Form 4 filing?

The Form 4 shows multiple employee and performance stock option grants recorded as dispositions to the issuer. Each option grant, tied to underlying common shares at various exercise prices, is reported with zero shares remaining after the transactions, indicating his option positions were eliminated.

What acquisition is referenced in the Aptose Biosciences (APTOF) Form 4 footnotes?

The footnotes describe a business arrangement where a Hammi Pharmaceuticals Co. Inc. subsidiary acquired all outstanding Aptose shares at C$2.41 per share. The deal was approved by the board, shareholders and a court, and underlies the reported dispositions in the Form 4.

What price per share did Aptose shareholders receive in the Hammi Pharmaceuticals deal?

Shareholders received C$2.41 per Aptose share in the Hammi Pharmaceuticals transaction. The filing converts this to U.S. dollars using an exchange rate of C$1.4 = US$1.00, aligning with the approximately $1.72 per share price reported for the common share disposition.

Does Rafael Bejar retain any Aptose Biosciences shares or options after these transactions?

No, the Form 4 reports zero common shares and zero option shares following the transactions. This indicates Rafael Bejar, a former Aptose SVP and Chief Medical Officer, no longer holds any reported Aptose equity positions after the Hammi acquisition closed.