Aptose Biosciences (APTO) furnishes press release under Reg FD

Rhea-AI Filing Summary

Aptose Biosciences Inc. filed a current report to furnish a company press release under Regulation FD. The report states that Aptose issued a press release dated August 18, 2025, which is attached as Exhibit 99.1 and incorporated by reference. The company also clarifies that this information is being furnished, not filed, for purposes of the Securities Exchange Act and the Securities Act, consistent with General Instruction B.2.

8-K Event Classification

2 items: 7.01, 9.01

2 items

Item 7.01 Regulation FD Disclosure Disclosure

Material non-public information disclosed under Regulation Fair Disclosure, often investor presentations or guidance.

Item 9.01 Financial Statements and Exhibits Exhibits

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

Understanding 8-K Material Events →

False000088236100008823612025-08-182025-08-18iso4217:USDxbrli:sharesiso4217:USDxbrli:shares

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):  August 18, 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 7.01. Regulation FD Disclosure.

On August 18, 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 August 18, 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: August 18, 2025	By:	/s/ William G. Rice, Ph.D.
		William G. Rice, Ph.D.
		Chairman, President, and Chief Executive Officer

FAQ

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

Aptose Biosciences Inc. furnished a press release dated August 18, 2025 as Exhibit 99.1 under Regulation FD, providing information to the market on a current basis.

How did Aptose Biosciences Inc. present the press release information?

The company furnished the press release as Exhibit 99.1 and stated that, under General Instruction B.2, this information is not deemed "filed" for purposes of Section 18 of the Exchange Act.

Which item of the 8-K did Aptose Biosciences Inc. use for this disclosure?

Aptose used Item 7.01, Regulation FD Disclosure, to furnish the August 18, 2025 press release to investors.

What exhibits are included with this Aptose Biosciences Inc. (APTO) 8-K?

The filing lists Exhibit 99.1, the press release dated August 18, 2025, and Exhibit 104, the cover page interactive data file embedded within the Inline XBRL document.

Who signed the Aptose Biosciences Inc. 8-K filed on August 18, 2025?

The report was signed on behalf of Aptose Biosciences Inc. by William G. Rice, Ph.D., who is the Chairman, President, and Chief Executive Officer.