GSK plc (GSK-L)
FTSE 100 · Pharmaceuticals & biotechnology · data since 1988-07-01 · last close 2026-09-09
GSK plc (GSK-L) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2.9 | 17.3 | -6.2 | -6.6 | -2.4 | 5.3 | -2.5 | -4.0 | -2.7 | · | · | · |
| 2025 | 4.3 | 4.4 | -0.3 | 1.5 | 1.6 | -7.8 | 2.0 | 2.4 | 8.4 | 13.1 | 0.6 | 1.9 |
| 2024 | 8.1 | 6.2 | 2.6 | -2.1 | 5.6 | -13.4 | -1.1 | 9.6 | -8.5 | -8.2 | -4.1 | 0.9 |
| 2023 | -1.0 | 0.1 | 0.3 | 0.8 | -6.6 | 3.1 | -0.3 | 0.3 | 7.4 | -2.3 | -2.6 | 2.2 |
| 2022 | 2.3 | -5.9 | 6.6 | 9.1 | -3.6 | 1.9 | -2.9 | -20.1 | -5.3 | 9.4 | -1.5 | 2.2 |
| 2021 | 1.1 | -12.2 | 8.2 | 4.0 | 0.4 | 5.6 | -0.1 | 3.1 | -4.0 | 7.5 | 1.1 | 5.3 |
| 2020 | 0.3 | -12.4 | -3.0 | 9.7 | 0.7 | -2.1 | -6.5 | -3.8 | -1.4 | -11.0 | 6.1 | -2.0 |
| 2019 | -0.9 | 1.4 | 6.6 | -1.5 | -2.9 | 3.3 | 8.0 | 0.5 | 1.9 | 1.4 | -0.8 | 1.4 |
| 2018 | -0.2 | -1.0 | 6.6 | 4.8 | 4.3 | 0.4 | 3.4 | -1.3 | -1.5 | -1.7 | 7.3 | -8.0 |
| 2017 | -2.2 | 7.9 | 0.7 | -6.6 | 9.9 | -4.0 | -7.4 | 1.3 | -2.9 | -8.8 | -5.7 | 3.4 |
| 2016 | 4.8 | -2.7 | 0.9 | 3.3 | -0.9 | 11.0 | 5.2 | -2.9 | 0.2 | -1.5 | -7.6 | 4.5 |
| 2015 | 6.6 | 5.1 | 0.3 | -2.0 | -4.0 | -9.0 | 5.6 | -4.0 | -5.6 | 11.0 | -3.5 | 1.3 |
| 2014 | -3.0 | 6.9 | -4.8 | 2.5 | -1.9 | -2.3 | -8.2 | 2.7 | -4.2 | 0.3 | 4.8 | -7.3 |
| 2013 | 8.3 | 0.7 | 5.7 | 7.9 | 3.2 | -3.8 | 2.2 | -2.3 | -5.3 | 5.5 | -1.5 | -0.4 |
| 2012 | -4.2 | -1.6 | 0.7 | 2.0 | 0.9 | 0.6 | 1.5 | -3.0 | 0.2 | -2.9 | -3.7 | 0.0 |
| 2011 | -9.0 | 4.7 | 0.7 | 9.8 | 1.1 | 1.1 | 2.3 | -3.9 | 1.7 | 5.0 | 0.3 | 4.8 |
| 2010 | -7.8 | -0.2 | 4.2 | -4.3 | -4.4 | -1.2 | -2.8 | 9.9 | 2.7 | -2.7 | -0.7 | 2.3 |
| 2009 | -5.1 | -12.3 | 1.7 | -3.5 | -0.7 | 2.5 | 7.5 | 4.7 | 2.2 | 1.7 | 0.6 | 5.0 |
| 2008 | -7.6 | -6.8 | -3.3 | 5.2 | -0.7 | -0.0 | 5.7 | 10.3 | -6.6 | -1.1 | -6.4 | 14.7 |
| 2007 | 1.6 | 4.8 | -2.3 | 3.7 | -9.6 | -0.4 | -3.8 | 3.2 | 0.1 | -4.5 | 4.0 | -0.7 |
| 2006 | -2.1 | 0.6 | 4.1 | 3.4 | -4.9 | 2.1 | -2.0 | 0.5 | -4.4 | -1.6 | -3.5 | -0.5 |
| 2005 | -3.9 | 5.8 | -2.4 | 8.2 | 3.7 | -0.7 | -0.7 | -0.1 | 7.7 | 1.9 | -2.7 | 2.8 |
| 2004 | -7.8 | -5.0 | -4.7 | 9.3 | -2.3 | -2.1 | 0.1 | 1.3 | 5.3 | -3.7 | -4.0 | 11.0 |
| 2003 | -4.0 | -2.4 | -0.3 | 12.7 | -3.9 | 1.5 | -2.5 | 1.3 | 3.5 | 1.1 | 3.9 | -2.4 |
| 2002 | -2.0 | 2.1 | -4.1 | 0.4 | -15.4 | 1.1 | -12.4 | -2.2 | 1.1 | -0.8 | -1.4 | -0.9 |
| 2001 | -5.0 | 6.1 | -3.4 | 0.3 | 3.5 | 4.6 | 1.4 | -9.8 | 5.0 | -3.6 | -4.9 | -2.1 |
| 2000 | -9.4 | -4.3 | 18.3 | 10.4 | -4.6 | 2.0 | -0.3 | 3.1 | 3.4 | -3.1 | 3.7 | -8.1 |
| 1999 | -1.6 | -2.1 | 4.3 | -11.5 | -4.7 | 0.6 | -9.7 | 2.8 | -3.2 | 13.4 | 4.6 | -6.8 |
| 1998 | 14.1 | 3.5 | -5.5 | 5.2 | -2.5 | 9.2 | 5.0 | -4.7 | -3.5 | 6.8 | 3.3 | 7.9 |
| 1997 | 5.4 | 4.0 | 7.4 | 8.7 | 0.7 | 1.5 | 4.2 | -4.4 | 12.9 | -8.3 | 6.0 | 6.3 |
| 1996 | 5.0 | -5.7 | -9.3 | -1.8 | 4.3 | 3.0 | 3.2 | 2.6 | 9.1 | -3.7 | 1.5 | -3.1 |
| 1995 | -6.7 | 2.6 | 13.1 | 2.4 | -1.0 | 6.1 | -2.9 | 2.2 | 1.1 | 10.3 | 2.2 | 4.9 |
| 1994 | -8.3 | 2.1 | -11.6 | -3.9 | -7.0 | 1.5 | 5.1 | 12.7 | -9.1 | 2.3 | 2.9 | 7.4 |
| 1993 | -12.5 | -3.9 | -9.1 | -1.9 | 2.4 | -7.5 | -2.8 | 8.5 | 6.3 | 8.2 | -0.9 | 7.2 |
| 1992 | -0.9 | -7.6 | 0.6 | -5.3 | 4.4 | -12.6 | 6.2 | 0.1 | 6.7 | 3.8 | -0.4 | -0.4 |
| 1991 | 5.1 | 9.3 | 14.3 | -1.4 | 7.0 | 4.1 | 5.2 | 6.0 | 0.8 | 14.3 | -2.9 | 11.9 |
| 1990 | -9.2 | -1.5 | 9.8 | -3.2 | 5.2 | 4.2 | 0.9 | -10.7 | -0.9 | 5.5 | 5.8 | 4.0 |
| 1989 | 12.7 | 3.0 | 6.5 | 4.5 | -1.6 | 0.2 | 6.1 | 9.7 | -6.0 | -6.7 | 8.6 | 4.0 |
| 1988 | · | · | · | · | · | · | -3.4 | -1.1 | 14.2 | 3.6 | -5.2 | 0.6 |
| Avg | -0.8 | 0.3 | 1.4 | 1.9 | -0.7 | 0.3 | 0.2 | 0.5 | 0.7 | 1.3 | 0.1 | 2.0 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
GSK-L seasonality — average by calendar month
GSK plc has monthly history back to 1988. Its strongest month by median is April — positive in 24 of 38 years, median +2.2%, and higher in 6 of the last 9. January is the soft spot, down in 23 of 38 with a median of -1.3%. Across its full record it has closed 55% of months higher, swings ±5.7% in an average month and has fallen 56.7% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | -0.8% | +0.3% | +1.4% | +1.9% | -0.7% | +0.3% | +0.2% | +0.5% | +0.8% | +1.3% | +0.1% | +2.0% |
| Win rate | 39%/38 | 55%/38 | 61%/38 | 63%/38 | 45%/38 | 63%/38 | 51%/39 | 59%/39 | 58%/38 | 53%/38 | 47%/38 | 66%/38 |
Win rate = share of positive months / sample size.
GSK-L risk & extremes
GSK-L drawdown & rolling returns
Percent below the all-time high at each month-end — how far underwater the asset was.
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Frequently asked questions
What was GSK plc's best month?+
GSK plc's strongest completed month on record is March 2000, at +18.25%.
What was GSK plc's worst month?+
Its weakest completed month on record is August 2022, at -20.15%.
Is GSK plc up this year?+
GSK plc is down 1.13% year to date, measured from its last close before 1 January.
What is GSK plc's 1-year return?+
+20.99% over the past twelve months, comparing the latest close with the most recent close on or before the same date a year earlier.
What is GSK plc's biggest drawdown?+
The deepest peak-to-trough fall on record is 56.7%, measured on month-end closes since 1988.
Which calendar month is historically best for GSK plc?+
December has the highest average return across every completed December since 1988. An average is not a forecast.
About GSK plc
GSK plc is a FTSE 100 company, a pharmaceuticals & biotechnology business worth about $98 billion. It turns caffeine and code into shareholder value — with price receipts on this site going back to 1988. And the long game: $100 at its first close here (1988) would be about $781 today.
Did you know?
- Its best month on record was March 2000 at +18.25%; its worst, August 2022 at -20.15%.
Trivia for entertainment — the numbers come from our price data; the jokes don't.