• SELLAS Life Sciences Group (NasdaqCM:SLS) is nearing the pivotal Phase 3 data readout for galinpepimut-S in the REGAL trial for acute myeloid leukemia (AML).
• The company has also initiated a Phase 2 trial of its CDK9 inhibitor SLS009 in newly diagnosed, high-risk AML patients.
• These clinical milestones mark a key moment for the company’s AML program and broader oncology pipeline.

SELLAS Life Sciences Group focuses on late-stage, oncology-focused drug candidates, with galinpepimut-S and SLS009 as key assets in AML. With the REGAL Phase 3 trial nearing completion and a Phase 2 program for SLS009 underway, the company is moving further into settings that address high medical need in blood cancers.

For investors watching NasdaqCM:SLS, these trials concentrate attention on upcoming clinical readouts and potential next steps with regulators. The outcomes will likely frame how the company allocates capital across its pipeline and how it positions its AML assets within a crowded and evolving treatment field.

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This update places SELLAS in the high-risk, high-reward segment of oncology investing. The Phase 3 REGAL trial for galinpepimut-S is now only two events away from the final analysis trigger, so investors are effectively in a waiting period where binary clinical results can matter more than recent share price moves or quarterly numbers. At the same time, the new 80 patient Phase 2 trial for SLS009 in newly diagnosed high-risk AML broadens the opportunity from a single late stage program to a two asset pipeline across different points in the AML treatment journey.

From a market standpoint, SELLAS is targeting a challenging segment of hematology that is also in focus for larger groups such as Bristol Myers Squibb, Novartis and AbbVie. Any differentiation around high-risk genetic subtypes or maintenance use in AML could be important if the company later negotiates partnerships or pricing. The recently outlined cash position of US$107.1 million and access to a US$150 million at the market facility indicate that management is preparing to support both the REGAL readout and continued SLS009 development, while accepting ongoing net losses as the cost of pursuing these programs.

The Risks and Rewards Investors Should Consider

• ⚠️ Clinical risk remains central, as both GPS and SLS009 still depend on future trial results before any potential approvals or commercial uptake.
• ⚠️ SELLAS currently reports net losses, such as the US$8.41 million loss in Q1 2026, and has limited revenue. Continued progress may rely on further equity issuance, including the US$150 million at the market program.
• 🎁 The REGAL Phase 3 trial is close to final analysis. This creates a clear upcoming data event that could clarify the role of GPS in AML maintenance therapy.
• 🎁 The advancement of SLS009 into a randomized Phase 2 trial in newly diagnosed high-risk AML adds a second potential value driver that targets patients with limited options under standard regimens.

What To Watch Going Forward

From here, the key focus is the timing and content of the REGAL topline readout and how it measures overall survival and safety in the AML maintenance setting. Investors may also want to follow SLS009 recruitment and any early updates from the first line high-risk AML study, especially in the context of the preclinical data already shared. Capital use is another watchpoint, including any draws on the at the market program and the effect on shareholder dilution as the company funds both trials in parallel.

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