SELLAS Life Sciences Group, Inc. (SLS) Stock

SELLAS Life Sciences Group, Inc. (SLS) is a Healthcare stock trading at $11.54 (as of 2026-09-11), with a market capitalization of $2.15B. Figures are sourced from first-party U.S. SEC EDGAR filings and market data.

SELLAS Life Sciences Group, Inc. is a biopharmaceutical company developing cancer immunotherapies, including galinpepimut-S (GPS) targeting Wilms tumor 1 and nelipepimut-S targeting HER2. Its programs are evaluated in clinical trials in areas such as acute myeloid leukemia, ovarian cancer, and early-stage breast cancer, including a collaboration with Merck to assess GPS with pembrolizumab across multiple indications.

Understand SELLAS Life Sciences Group, Inc.: how it makes money

SELLAS develops cancer immunotherapies, including GPS and nelipepimut-S, and would make money by commercializing successful treatments after approval.

SELLAS's profit model hinges on clinical success, because it must advance cancer immunotherapies toward approval and commercialization before building a product business.

Business quality (Unprofitable): SELLAS is unprofitable, with a reported gross margin of 90% and operating margin of -4195%.

Bull case

  • Strong margins could scale: SELLAS reports a gross margin of 90%, which could support attractive product economics if a clinical candidate reaches approval and commercialization.

Bear case

  • Operating losses remain extreme: The reported operating margin is -4195%, showing that development costs overwhelm the current business and creating a risk that further funding could dilute shareholders before commercialization.
Valuation — source: SEC EDGAR (first-party)
Price$11.54
Market Cap$2.15B
Price / Book15.60
Profitability & Growth — source: SEC EDGAR
Revenue (TTM)$0.00
Return on Equity-24.4%
Current Ratio18.83
Revenue Growth (YoY)-100.0%
Revenue Growth (3Y)-100.0%
EPS Growth (YoY)-37.1%
Valuation vs Sector & Industry
Sector P/E (Healthcare)19.4
Industry P/E (Pharmaceutical Products)15.1
Smart-Money Activity — SEC Form 4 / 13F / Congressional disclosures
Insider Buys (12mo)1
Top Institutional HolderBlackRock, Inc. ($222.44M)
Institutional Holders Tracked10
Company
SectorHealthcare
IndustryPharmaceutical Products
CEOAngelos Stergiou
Employees15
CountryUS
IPO Date2008-03-12

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SLS earnings history · SLS institutional & insider holders · SLS KPIs & operating metrics · SLS financials · SLS filings, presentations & press releases · SLS investor presentations & press releases · SLS SEC filings · SLS peers · Congress trades · Insider trades · Short interest · Stock screener

Data as of 2026-09-11.

Figures sourced from U.S. Securities and Exchange Commission (SEC EDGAR) filings and market data. Not personalized investment advice.