Aptose Biosciences Inc. 8-K

What Happened
Aptose Biosciences, Inc. (APTOF) filed a Form 8-K on June 15, 2026 reporting a Regulation FD disclosure. The company issued a press release that day (attached as Exhibit 99.1 to the 8-K). The filing notes the press release is furnished under General Instruction B.2 of Form 8-K and therefore is not deemed "filed" for purposes of Section 18 of the Securities Exchange Act.

Key Details

• Filing date: June 15, 2026 (Form 8-K items 7.01 and 9.01).
• Exhibit included: Press Release dated June 15, 2026 (Exhibit 99.1).
• Legal note: Information in Exhibit 99.1 is furnished, not deemed filed under Section 18, and is not incorporated by reference into other registrations except by specific reference.
• Administrative exhibit: Inline XBRL cover page is included in the filing.

Why It Matters
This 8-K signals that Aptose publicly released information via a press release on June 15, 2026. The 8-K itself does not disclose the substance of that release; investors should read Exhibit 99.1 (the press release) on the SEC EDGAR site or the company’s investor page to learn the details and assess any impact on the company’s outlook or stock. The Reg FD furnishing means the company intended to make the information broadly available while limiting Section 18 liability for the document as filed.