SELLAS Life Sciences Group, Inc. Common Stock Shares Outstanding

• SELLAS Life Sciences Group, Inc. showed an increase of +107.0% in Common Stock Shares Outstanding from 2024 to 2025.
• This data is from SELLAS Life Sciences Group, Inc.'s annual report (Form 10-K), filed with the SEC on March 19, 2026.
• XBRL data for this metric is available from 2010 to 2025 (16 years of filings). Earlier data may not exist in machine-readable XBRL format as companies adopted electronic filing at different times.
• Quarterly values from 10-Q filings: Q2 2011: 41.84 million shares | Q3 2011: 42.99 million shares | Q1 2012: 49.41 million shares | Q2 2012: 66.96 million shares | Q3 2012: 67.60 million shares | Q1 2013: 83.08 million shares | Q2 2013: 84.41 million shares | Q3 2013: 104.91 million shares | Q1 2014: 118.03 million shares | Q2 2014: 118.03 million shares | Q3 2014: 121.46 million shares | Q1 2015: 121.46 million shares | Q2 2015: 121.46 million shares | Q3 2015: 162.58 million shares | Q1 2016: 181.84 million shares | Q2 2016: 181.84 million shares | Q3 2016: 214.50 million shares | Q1 2017: 214.50 million shares | Q2 2017: 37.44 million shares | Q2 2017: 37.44 million shares | Q3 2017: 41.82 million shares | Q1 2018: 6.15 million shares | Q2 2018: 7.38 million shares | Q3 2018: 20.50 million shares | Q1 2019: 24.18 million shares | Q2 2019: 100.14 million shares | Q3 2019: 4.55 million shares | Q4 2019: 227.80 million shares | Q1 2020: 6.72 million shares | Q2 2020: 6.72 million shares | Q3 2020: 9.46 million shares | Q1 2021: 15.08 million shares | Q2 2021: 15.87 million shares | Q3 2021: 15.87 million shares | Q1 2022: 15.91 million shares | Q2 2022: 20.55 million shares | Q3 2022: 20.59 million shares | Q1 2023: 28.35 million shares | Q2 2023: 28.35 million shares | Q3 2023: 28.39 million shares | Q1 2024: 56.27 million shares | Q2 2024: 57.75 million shares | Q3 2024: 64.38 million shares | Q1 2025: 90.90 million shares | Q2 2025: 100.37 million shares | Q3 2025: 125.08 million shares.
• Over the full 16 years of available data (2010 to 2025), SELLAS Life Sciences Group, Inc.'s Common Stock Shares Outstanding has grown by 733.3%.
• Historical annual values: Fiscal year 2025: 153.10 million shares | Fiscal year 2024: 73.98 million shares | Fiscal year 2023: 32.13 million shares | Fiscal year 2022: 21.01 million shares | Fiscal year 2021: 15.90 million shares | Fiscal year 2020: 14.25 million shares | Fiscal year 2019: 5.08 million shares | Fiscal year 2018: 440,529 shares | Fiscal year 2017: 5.77 million shares | Fiscal year 2016: 1.27 million shares | Fiscal year 2015: 8.10 million shares | Fiscal year 2014: 109.43 million shares | Fiscal year 2013: 109.43 million shares | Fiscal year 2012: 82.92 million shares | Fiscal year 2011: 47.14 million shares | Fiscal year 2010: 18.37 million shares.
• Data sourced from SEC EDGAR public filings as of August 9, 2026.

Last verified: August 9, 2026