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NASDAQ:SLS News 18 October 2025 - 20 October 2025

Sellas Life Sciences (SLS) Stock Skyrockets: BlackRock’s 5% Bet and Breakthrough Cancer Data Ignite Rally

Sellas Life Sciences (SLS) Stock Skyrockets: BlackRock’s 5% Bet and Breakthrough Cancer Data Ignite Rally

Sellas Life Sciences (NASDAQ: SLS) stock has surged roughly 100% year-to-date, closing around $2.14 on Oct. 17, 2025 ts2.tech ts2.tech (versus a 52-week low of $0.77). In after-hours trading on Oct. 17 it spiked another +38%, briefly touching a new 52-week high ts2.tech. Big investors are piling in: BlackRock disclosed a 5.4% stake (~5.7M shares) in SLS on Oct. 18 ts2.tech, and other funds like Vanguard and Marshall Wace added millions of shares in Q2 quiverquant.com. On the drug-development front, Sellas’s lead AML immunotherapy (galinpepimut‑S, “GPS”) is in a Phase 3 AML trial (REGAL), which recently passed an interim safety review
20 October 2025
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Sellas Life Sciences (SLS) Stock Rallies on Promising Leukemia Data – Analysts Eye Triple-Digit Upside

Sellas Life Sciences (SLS) Stock Rallies on Promising Leukemia Data – Analysts Eye Triple-Digit Upside

Stock Price and Performance As of mid-October 2025, Sellas Life Sciences (NASDAQ:SLS) trades around $2.10–2.20. This is near the top of its 52-week range ($0.77 low) and about twice its price at the start of 2025 stockanalysis.com marketbeat.com. Trading volume and volatility have picked up – for instance, on Oct. 14 a massive spike in call-option activity (761% above average) coincided with bullish sentiment marketbeat.com. The stock’s YTD gain (~100%) far outpaces many small-cap biotechs. Technical platforms note SLS is in “uptrend” territory: the stock is well above its 20-day EMA ($1.89) and 50-day EMA ($1.81) tipranks.com, which TipRanks flags
18 October 2025
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BlackRock’s Big Bet Sends SELLAS Life Sciences (SLS) Stock Soaring – What’s Next for This Biotech?

BlackRock’s Big Bet Sends SELLAS Life Sciences (SLS) Stock Soaring – What’s Next for This Biotech?

Key Facts – October 18, 2025 Stock Performance: SLS on a Tear in 2025 SELLAS Life Sciences’ stock has been on a remarkable run this year. Shares have effectively doubled in 2025, and the momentum accelerated in mid-October. On Friday Oct. 17, SLS closed at $2.14, up roughly 100% year-to-date finbold.com. In fact, during that day’s session the stock touched a 52-week high of $2.27 (more than 3× its 52-week low of $0.77) marketbeat.com. Trading activity exploded as well – volume spiked to several times the usual level (over 6.7 million shares vs ~2.2M average) amid a flurry of speculative
18 October 2025
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