Joint Filer Information
| Name: | DRW Investments, LLC, DRW Commodities, LLC and DRW Holdings, LLC |
| Address: | 540 W. Madison St. Suite 2500 Chicago, IL 60661 |
| Designated Filer: | Donald R. Wilson, Jr. |
| Issuer and Ticker Symbol: | Aptose Biosciences Inc. [APTO] |
| Date of Event Requiring Statement: | August 3, 2021 |
The undersigned, DRW Investments, LLC, DRW Commodities, LLC and DRW Holdings, LLC are jointly filing the attached Statement of Changes in Beneficial Ownership on Form 4 with Donald R. Wilson, Jr. with respect to the beneficial ownership of securities of Aptose Biosiences Inc.
Signatures:
DRW INVESTMENTS, LLC
By: /s/ Jeffrey Levoff Jeffrey Levoff, Authorized Signatory
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DRW COMMODITIES, LLC
By: /s/ Jeffrey Levoff Jeffrey Levoff, Authorized Signatory
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DRW HOLDINGS, LLC
By: /s/ Jeffrey Levoff Jeffrey Levoff, Authorized Signatory |