SLS
$9.98-11.99%
SELLAS Life Sciences Group Inc.Stock · HealthcareRussell 2000 0.09%Nasdaq Composite 0.005%US Stock Market 0.004%Russell 3000 0.003%
SELLAS Life Sciences Group Inc. monthly returns
SELLAS Life Sciences Group Inc. has averaged 0.39% per month, positive in 39% of months. Month-by-month returns for SELLAS Life Sciences Group Inc. (SLS) below, through October 16, 2026 — the table lists the most recent months; the bar chart plots the last 5 years.
Average month
+0.4%
214 months
Best month
+132.7%
Dec 2025
Worst month
-78.0%
Jun 2019
Positive months
39%
of all months
SELLAS Life Sciences Group Inc. monthly returns#
| Month | Path | Total return |
|---|---|---|
| Oct 2026 | -18.9% | |
| Sep 2026 | -7.7% | |
| Aug 2026 | +33.3% | |
| Jul 2026 | -32.2% | |
| Jun 2026 | +58.5% | |
| May 2026 | +88.1% | |
| Apr 2026 | +17.0% | |
| Mar 2026 | -14.2% | |
| Feb 2026 | +30.8% | |
| Jan 2026 | +0.0% | |
| Dec 2025 | +132.7% | |
| Nov 2025 | -11.0% | |
| Oct 2025 | +13.0% | |
| Sep 2025 | -16.1% | |
| Aug 2025 | +20.8% | |
| Jul 2025 | -27.4% | |
| Jun 2025 | +28.1% | |
| May 2025 | +10.3% | |
| Apr 2025 | +43.5% | |
| Mar 2025 | -8.5% | |
| Feb 2025 | -27.2% | |
| Jan 2025 | +55.8% | |
| Dec 2024 | -8.0% | |
| Nov 2024 | -4.2% | |
| Oct 2024 | -5.6% | |
| Sep 2024 | -3.1% | |
| Aug 2024 | +11.2% | |
| Jul 2024 | -2.5% | |
| Jun 2024 | -15.6% | |
| May 2024 | +13.7% | |
| Apr 2024 | +22.8% | |
| Mar 2024 | +0.0% | |
| Feb 2024 | +57.8% | |
| Jan 2024 | -39.6% | |
| Dec 2023 | +1.9% | |
| Nov 2023 | +7.2% | |
| Oct 2023 | -40.9% | |
| Sep 2023 | +11.6% | |
| Aug 2023 | -10.4% | |
| Jul 2023 | +4.5% | |
| Jun 2023 | -8.7% | |
| May 2023 | +22.0% | |
| Apr 2023 | -1.4% | |
| Mar 2023 | -15.4% | |
| Feb 2023 | -49.1% | |
| Jan 2023 | +40.7% | |
| Dec 2022 | -1.3% | |
| Nov 2022 | -48.9% | |
| Oct 2022 | +131.7% | |
| Sep 2022 | -34.0% | |
| Aug 2022 | +19.5% | |
| Jul 2022 | +14.8% | |
| Jun 2022 | -26.9% | |
| May 2022 | +12.1% | |
| Apr 2022 | -59.3% | |
| Mar 2022 | +9.5% | |
| Feb 2022 | +14.2% | |
| Jan 2022 | -3.4% | |
| Dec 2021 | -18.0% | |
| Nov 2021 | -22.4% | |
| Oct 2021 | -5.1% | |
| Sep 2021 | -1.4% | |
| Aug 2021 | +8.5% | |
| Jul 2021 | -22.9% | |
| Jun 2021 | -7.2% | |
| May 2021 | +51.8% | |
| Apr 2021 | -7.7% | |
| Mar 2021 | +5.0% | |
| Feb 2021 | +33.3% | |
| Jan 2021 | +5.0% | |
| Dec 2020 | +55.8% | |
| Nov 2020 | +45.7% | |
| Oct 2020 | -3.4% | |
| Sep 2020 | +23.8% | |
| Aug 2020 | -39.9% | |
| Jul 2020 | +21.5% | |
| Jun 2020 | -14.6% | |
| May 2020 | +35.6% | |
| Apr 2020 | +46.2% | |
| Mar 2020 | -16.8% | |
| Feb 2020 | -25.4% | |
| Jan 2020 | -35.1% | |
| Dec 2019 | -6.5% | |
| Nov 2019 | -29.2% | |
| Oct 2019 | +8.3% | |
| Sep 2019 | -14.3% | |
| Aug 2019 | -17.6% | |
| Jul 2019 | +54.5% | |
| Jun 2019 | -78.0% | |
| May 2019 | -50.0% | |
| Apr 2019 | -2.0% | |
| Mar 2019 | -26.6% | |
| Feb 2019 | -4.8% | |
| Jan 2019 | +18.7% | |
| Dec 2018 | -31.3% | |
| Nov 2018 | +46.7% | |
| Oct 2018 | +0.0% | |
| Sep 2018 | +13.0% | |
| Aug 2018 | -6.1% | |
| Jul 2018 | -66.4% | |
| Jun 2018 | -34.0% | |
| May 2018 | -8.2% | |
| Apr 2018 | +63.5% | |
| Mar 2018 | -29.6% | |
| Feb 2018 | -24.6% | |
| Jan 2018 | -16.7% | |
| Dec 2017 | -16.1% | |
| Nov 2017 | -3.1% | |
| Oct 2017 | -8.6% | |
| Sep 2017 | -2.8% | |
| Aug 2017 | -37.9% | |
| Jul 2017 | +0.0% | |
| Jun 2017 | +3.6% | |
| May 2017 | -5.1% | |
| Apr 2017 | -3.3% | |
| Mar 2017 | -17.6% | |
| Feb 2017 | -55.2% | |
| Jan 2017 | -14.9% | |
| Dec 2016 | -36.4% | |
| Nov 2016 | -33.7% |
Monthly total return (since Nov 2021)#
-100%-50%0%50%100%
Nov 2021-22%
Dec 2021-18%
Jan 2022-3.4%2022
Feb 2022+14%
Mar 2022+9.5%
Apr 2022-59%
May 2022+12%
Jun 2022-27%
Jul 2022+15%
Aug 2022+20%
Sep 2022-34%
Oct 2022+132%
Nov 2022-49%
Dec 2022-1.3%
Jan 2023+41%2023
Feb 2023-49%
Mar 2023-15%
Apr 2023-1.4%
May 2023+22%
Jun 2023-8.7%
Jul 2023+4.5%
Aug 2023-10%
Sep 2023+12%
Oct 2023-41%
Nov 2023+7.2%
Dec 2023+1.9%
Jan 2024-40%2024
Feb 2024+58%
Mar 20240%
Apr 2024+23%
May 2024+14%
Jun 2024-16%
Jul 2024-2.5%
Aug 2024+11%
Sep 2024-3.1%
Oct 2024-5.6%
Nov 2024-4.2%
Dec 2024-8.0%
Jan 2025+56%2025
Feb 2025-27%
Mar 2025-8.5%
Apr 2025+44%
May 2025+10%
Jun 2025+28%
Jul 2025-27%
Aug 2025+21%
Sep 2025-16%
Oct 2025+13%
Nov 2025-11%
Dec 2025+133%
Jan 20260%2026
Feb 2026+31%
Mar 2026-14%
Apr 2026+17%
May 2026+88%
Jun 2026+59%
Jul 2026-32%
Aug 2026+33%
Sep 2026-7.7%
Oct 2026-19%
SELLAS Life Sciences Group Inc. returns by calendar month#
Every month of every year since 2009, one tick per year on a shared scale; the dark bar is the month's average. Total returns, dividends reinvested.
October 2026 so far: -18.93% — 15th of 18 Octobers since 2009 at the last close; the average October returned +3.1%.
| Month | −135%0+135% | Average | Median | Up | Best | Worst |
|---|---|---|---|---|---|---|
| Jan | -0.6% | +2.5% | 50% | +55.8% 2025 | -54.4% 2016 | |
| Feb | +0.7% | -4.0% | 44% | +69.8% 2012 | -55.2% 2017 | |
| Mar | +0.1% | -12.9% | 33% | +107.5% 2012 | -36.7% 2014 | |
| Apr | +3.2% | -2.0% | 39% | +63.5% 2018 | -59.3% 2022 | |
| May | +14.5% | +14.4% | 67% | +88.1% 2026 | -50.0% 2019 | |
| Jun | -10.5% | -11.0% | 33% | +58.5% 2026 | -78.0% 2019 | |
| Jul | -5.3% | -5.0% | 33% | +54.5% 2019 | -66.4% 2018 | |
| Aug | -4.8% | -7.6% | 39% | +33.3% 2026 | -39.9% 2020 | |
| Sep | -0.4% | -2.1% | 33% | +62.9% 2010 | -34.0% 2022 | |
| Oct | +3.1% | -2.2% | 35% | +131.7% 2022 | -40.9% 2023 | |
| Nov | -0.4% | -4.2% | 35% | +79.4% 2013 | -48.9% 2022 | |
| Dec | +6.6% | -8.0% | 29% | +132.7% 2025 | -36.4% 2016 |
Methodology#
Monthly returns are total returns (dividends reinvested), computed from SLS's split- and dividend-adjusted month-end closes. The table shows the most recent 120 months and the bar chart the most recent 60. See the year-by-year returns for the annual view. Past performance does not predict future returns; not investment advice.
FAQ#
- What is SELLAS Life Sciences Group Inc.'s average monthly return?
- SELLAS Life Sciences Group Inc. (SLS) has averaged about 0.39% per month, positive in roughly 39% of months. The best month was Dec 2025 (+132.7%) and the worst was Jun 2019 (-78.0%).
More on SELLAS Life Sciences Group Inc.
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