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SELLAS Life Sciences Group, Inc.

For the period ended Jun 30, 2026. Filed Aug 11, 2026.

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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Jun 30, 2026 · Filed Aug 11, 2026

SLS$8.58+1.9%Stored close · as of Nov 9, 2026

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Item 5. Other Information

During the three months ended June 30, 2026, the following directors adopted trading plans under Rule 10b5-1 of the Exchange Act.

NameTitleActionDate AdoptedPlan End DateAggregate Shares
John VarianDirectorAdoption of Rule 10b5-1 trading plan5/15/20265/15/202712,500
David ScheinbergDirectorAdoption of Rule 10b5-1 trading plan5/18/20265/18/202720,000
Robert Van NostrandDirectorAdoption of Rule 10b5-1 trading plan6/11/20266/11/202712,500

Each of these Rule 10b5-1 trading plans were adopted for the sale of up to the indicated amount of shares in order to satisfy tax obligations that arise upon the vesting of previously granted restricted stock units. These trading plans were entered into during an open insider trading window.

No other director or officer adopted, modified, orterminated any contract, instruction, or written plan for the purchase or sale of securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any "non-Rule 10b5-1 trading arrangement" (as defined in Item 408 of Regulation S-K) during the three months ended June 30, 2026.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.