Aptose Biosciences posts operations update

Aptose Biosciences Inc. filed a Form 8-K to furnish a press release covering its results of operations and financial condition.

Rhea-AI Filing Summary

Aptose Biosciences Inc. filed a Form 8-K to furnish a press release covering its results of operations and financial condition. The press release, dated November 13, 2025, is attached as Exhibit 99.1 and is incorporated by reference for informational purposes.

The company states that the Exhibit 99.1 information is being furnished under the Exchange Act and will not be deemed filed under Section 18, nor automatically incorporated into Securities Act or Exchange Act filings unless specifically referenced.

8-K Event Classification

2 items: 2.02, 9.01

2 items

Item 2.02 Results of Operations and Financial Condition Financial

Disclosure of earnings results, typically an earnings press release or preliminary financials.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Aptose Biosciences Inc. (APTOF) disclose in this 8-K filing?

Aptose Biosciences Inc. disclosed that it issued a press release covering its results of operations and financial condition. The press release is dated November 13, 2025 and is attached as Exhibit 99.1, incorporated by reference for informational purposes.

How does the Aptose Biosciences (APTOF) 8-K treat the attached press release?

The press release attached as Exhibit 99.1 is treated as information that is furnished, not filed, under the Exchange Act. It is excluded from Section 18 liability and only becomes part of other filings if specifically incorporated by reference there.

What is Exhibit 99.1 in the Aptose Biosciences (APTOF) Form 8-K?

Exhibit 99.1 is a press release issued by Aptose Biosciences Inc. dated November 13, 2025. It contains information on the company’s results of operations and financial condition and is incorporated by reference into the Form 8-K as a furnished exhibit.

Which sections of the securities laws are referenced in the Aptose Biosciences (APTOF) 8-K?

The filing references Section 18 of the Securities Exchange Act of 1934 and the Securities Act of 1933. It clarifies that Exhibit 99.1 is not deemed filed under Section 18 or incorporated into other filings unless expressly referenced there.

What items are covered in this Aptose Biosciences Inc. (APTOF) Form 8-K?

The Form 8-K covers Item 2.02, Results of Operations and Financial Condition, and Item 9.01, Financial Statements and Exhibits. Under Item 9.01, Aptose lists Exhibit 99.1 as the press release and Exhibit 104 as the cover page interactive data file.

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Accepted by SEC EDGAR 11/13/2025 - 05:00 PM Learn about SEC filing dates

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

_________________

FORM 8-K

_________________

CURRENT REPORT

Pursuant to Section 13 or 15(d)
of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):  November 13, 2025

_______________________________

Aptose Biosciences Inc.

(Exact name of registrant as specified in its charter)

_______________________________

Canada	001-32001	98-1136802
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

66 Wellington Street West, Suite 5300

TD Bank Tower, Box 48

Toronto, Ontario M5K 1E6
Canada

(Address of Principal Executive Offices) (Zip Code)

(647) 479-9828

(Registrant's telephone number, including area code)

(Former name or former address, if changed since last report)

_______________________________

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
None	N/A	N/A

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On November 13, 2025, the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

In accordance with General Instruction B.2 of Form 8-K, the information in the press release attached as Exhibit 99.1 hereto shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits 

Exhibit Number		Description
99.1		Press Release dated November 13, 2025
104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	Aptose Biosciences Inc.
Date: November 13, 2025	By:	/s/ William G. Rice, Ph.D.
		William G. Rice, Ph.D.
		Chairman, President, and Chief Executive Officer