SELLAS Life Sciences Group, Inc. 8-K

What Happened
SELLAS Life Sciences Group, Inc. announced its financial results for the quarter ended March 31, 2026 and provided a corporate update via a press release issued and furnished to the SEC on May 12, 2026. The press release is included in the 8-K as Exhibit 99.1 and is incorporated by reference in the filing. The report was signed by John T. Burns, Senior Vice President and Chief Financial Officer.

Key Details

• Filing date: May 12, 2026; quarter covered: March 31, 2026 (quarterly results / earnings announcement).
• Press release with the results and corporate update furnished as Exhibit 99.1 to the Form 8-K.
• Form 8-K was executed and filed by John T. Burns, SVP and CFO.
• The filing also includes the Inline XBRL cover page (Exhibit 104).

Why It Matters
This 8-K publicly furnishes SELLAS’s quarterly financial results and any accompanying corporate updates; investors should review the press release for the specific revenue, profit/loss, cash position, operational highlights, and any changes to business outlook. Because the 8-K itself references the press release rather than embedding full financial tables in the body of the filing, the Exhibit (press release) is the primary source for the quarter’s financial metrics and disclosures.