SELLAS Life Sciences Stock Is Surging Wednesday: What's Driving The Move?

Sellas Life Sciences Group Inc ( SLS ) shares are trading higher on Wednesday as traders react to the company's latest update on its acute myeloid leukemia pipeline and the timeline for a pivotal Phase 3 readout. Here’s what investors need to know. SELLAS Life Sciences ( SLS ) stock is challenging resistance. Why did SLS hit a new high? What’s Driving SELLAS Life Sciences Stock Today? Alongside its first-quarter 2026 financial results, SELLAS last week announced that its pivotal Phase 3 REGAL trial, which evaluates GPS in AML patients, is on the cusp of a major milestone. As of May 11, the study had recorded 78 of its pre-specified 80 events. Reaching this 80th event will immediately trigger database lock procedures, statistical analysis, and the subsequent disclosure of topline data. Additionally, the company highlighted the expansion of its SLS009 program with the launch of an 80-patient Phase 2 study. This trial targets newly diagnosed AML patients who are unlikely to benefit from standard therapies, with topline data expected in the fourth quarter of 2026. This clinical momentum builds on promising preclinical findings presented at the 2026 AACR meeting, which demonstrated SLS009’s ability to reduce key tumor survival proteins and induce cell death in high-risk mutant AML subtypes. Critical Price Levels To Watch For SLS Stock From a trend perspective, the stock is extended: at $8.26, it's trading 51.5% above the 20-day SMA ($5.48) and 157.7% above the 200-day SMA ($3.22), which is consistent with a strong momentum run rather than a quiet grind higher. The moving-average structure remains bullish (20-day SMA above the 50-day, and the 50-day above the 200-day), but this kind of distance from the longer averages can raise the odds of sharp pullbacks if buyers pause. RSI is the cleanest momentum read right now, sitting at 74.40, which flags an overbought condition and suggests the recent rally is getting stretched. In plain English, RSI helps gauge whether a move is "too far, too fast," and readings above 70 often mean the stock may need consolidation even if the bigger trend stays up. Key Resistance: $7.80 — the prior 52-week high zone that has now been exceeded, making it a key "hold-above" area if the breakout is to stick Key Support: $5.48 — the 20-day SMA area, a logical first trend support if momentum cools SLS Stock Price Movement Wednesday Morning SLS Stock Price Activity: SELLAS Life Sciences ( SLS ) shares were up 13.57% at $8.62 Wednesday morning, according to Benzinga Pro data. Read Also: What's Going On With Plug Power Stock Today? Image: Shutterstock