Leidos (LDOS)
S&P 500 · Industrials · data since 2006-10-17 · last close 2026-09-09
Leidos (LDOS) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 4.4 | -7.0 | -11.0 | -4.0 | -14.3 | -19.1 | 12.3 | 21.3 | -8.6 | · | · | · |
| 2025 | -1.4 | -8.5 | 4.1 | 9.1 | 0.9 | 6.5 | 1.2 | 13.3 | 4.7 | 0.8 | 0.3 | -5.4 |
| 2024 | 2.1 | 15.7 | 2.8 | 7.0 | 4.9 | -0.5 | -1.0 | 9.8 | 3.1 | 12.4 | -9.7 | -12.7 |
| 2023 | -6.0 | -1.8 | -4.8 | 1.3 | -16.3 | 13.8 | 5.7 | 4.3 | -5.1 | 7.5 | 8.3 | 1.2 |
| 2022 | 0.6 | 13.8 | 6.4 | -4.2 | 1.0 | -3.3 | 6.3 | -11.2 | -7.6 | 16.1 | 7.6 | -3.5 |
| 2021 | 0.9 | -16.6 | 9.2 | 5.2 | 1.4 | -1.3 | 5.3 | -7.8 | -1.7 | 4.0 | -12.1 | 1.5 |
| 2020 | 2.6 | 2.2 | -10.4 | 7.8 | 6.6 | -10.7 | 1.6 | -4.9 | -1.1 | -6.9 | 21.3 | 4.7 |
| 2019 | 10.0 | 11.4 | -0.3 | 14.7 | 2.5 | 6.4 | 2.8 | 6.4 | -1.3 | 0.4 | 5.3 | 8.2 |
| 2018 | 3.1 | -4.9 | 3.8 | -1.8 | -6.5 | -1.3 | 16.0 | 3.4 | -1.8 | -6.3 | -2.8 | -15.9 |
| 2017 | -5.5 | 10.3 | -3.5 | 3.0 | 5.5 | -6.4 | 3.4 | 9.1 | 2.1 | 5.6 | 1.7 | 2.1 |
| 2016 | -18.0 | -6.3 | 17.2 | -1.4 | -0.4 | -2.5 | 4.5 | 10.0 | 7.7 | -4.0 | 23.2 | 0.5 |
| 2015 | -3.4 | 8.7 | -6.8 | -0.0 | 2.1 | -5.0 | 1.9 | 3.1 | -1.8 | 28.2 | 10.2 | -2.3 |
| 2014 | -1.8 | -1.5 | -20.8 | 6.2 | 2.4 | 0.5 | -2.8 | 1.9 | -8.8 | 7.5 | 10.5 | 7.7 |
| 2013 | 8.0 | -2.3 | 14.6 | 11.2 | -3.0 | 3.0 | 10.7 | -1.4 | 22.3 | 4.2 | 3.3 | -4.4 |
| 2012 | 4.6 | -5.0 | 8.0 | -7.0 | -8.6 | 9.1 | -3.5 | 5.5 | -1.4 | -7.7 | 4.9 | -1.8 |
| 2011 | 4.5 | -1.4 | 3.5 | 2.8 | 0.9 | -4.2 | -4.7 | -6.4 | -21.3 | 5.3 | -3.1 | 2.0 |
| 2010 | -3.2 | 7.5 | -10.2 | -1.6 | -1.3 | -2.6 | -0.7 | -10.5 | 7.4 | -2.8 | -1.4 | 3.5 |
| 2009 | 1.3 | -4.2 | -1.3 | -3.0 | -3.5 | 6.2 | -2.5 | 2.2 | -5.1 | 1.0 | 0.6 | 6.3 |
| 2008 | -6.1 | 0.8 | -2.5 | 2.2 | 4.9 | 4.4 | -9.2 | 6.1 | 0.9 | -8.7 | -3.6 | 9.4 |
| 2007 | 4.3 | -2.8 | -3.9 | 5.6 | 10.2 | -10.3 | -7.3 | 9.3 | 4.8 | 2.7 | 1.2 | 0.9 |
| 2006 | · | · | · | · | · | · | · | · | · | 11.3 | -5.2 | -6.2 |
| Avg | 0.0 | 0.4 | -0.3 | 2.6 | -0.5 | -0.9 | 2.0 | 3.2 | -0.6 | 3.5 | 3.0 | -0.2 |
Values in %. Current and first-listed months are partial (greyed).
returnsview.com
LDOS seasonality — average by calendar month
Leidos has monthly history back to 2006. Its strongest month by median is August — positive in 14 of 20 years, median +3.8%, and higher in 6 of the last 9. February is the soft spot, down in 12 of 20 with a median of -1.6%. Across its full record it has closed 56% of months higher, swings ±7.7% in an average month and has fallen 51.2% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | +0.1% | +0.4% | -0.3% | +2.6% | -0.5% | -0.9% | +2.0% | +3.2% | -0.2% | +3.5% | +3.0% | -0.2% |
| Win rate | 60%/20 | 40%/20 | 45%/20 | 60%/20 | 60%/20 | 40%/20 | 60%/20 | 70%/20 | 42%/19 | 70%/20 | 65%/20 | 60%/20 |
Win rate = share of positive months / sample size.
LDOS risk & extremes
LDOS 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 Leidos's best month?+
Leidos's strongest completed month on record is October 2015, at +28.16%.
What was Leidos's worst month?+
Its weakest completed month on record is September 2011, at -21.27%.
Is Leidos up this year?+
Leidos is down 28.54% year to date, measured from its last close before 1 January.
What is Leidos's 1-year return?+
-27.67% 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 Leidos's biggest drawdown?+
The deepest peak-to-trough fall on record is 51.2%, measured on month-end closes since 2006.
Which calendar month is historically best for Leidos?+
October has the highest average return across every completed October since 2006. An average is not a forecast.
About Leidos
Leidos is an S&P 500 company, an industrials business worth about $16 billion. It measures its order book in years, not quarters — with price receipts on this site going back to 2006. And the long game: $100 at its first close here (2006) would be about $566 today.
Did you know?
- Its best month on record was October 2015 at +28.16%; its worst, September 2011 at -21.27%.
- It has closed August in the green 14 out of 20 times — calendar astrology, but the fun kind.
Trivia for entertainment — the numbers come from our price data; the jokes don't.