Illumina, Inc. (ILMN)
S&P 500 · Health Care · data since 2000-07-28 · last close 2026-09-18
Illumina, Inc. (ILMN) monthly returns (%)
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 10.4 | -7.2 | -8.3 | 2.8 | 28.6 | 7.9 | 16.6 | 4.2 | 12.2 | · | · | · |
| 2025 | -0.7 | -33.1 | -10.6 | -2.2 | 6.0 | 16.0 | 7.7 | -2.7 | -5.0 | 30.1 | 6.4 | -0.2 |
| 2024 | 2.7 | -2.2 | -1.8 | -10.4 | -15.3 | 2.9 | 17.5 | 7.2 | -0.8 | 10.5 | 0.0 | -7.3 |
| 2023 | 5.9 | -7.0 | 16.7 | -11.6 | -4.3 | -4.7 | 2.5 | -14.0 | -16.9 | -20.3 | -6.8 | 36.6 |
| 2022 | -8.3 | -6.4 | 7.0 | -15.1 | -19.3 | -23.0 | 17.5 | -6.9 | -5.4 | 19.9 | -4.7 | -7.3 |
| 2021 | 15.3 | 3.0 | -12.6 | 2.3 | 3.3 | 16.7 | 4.8 | -7.8 | -11.3 | 2.3 | -12.0 | 4.1 |
| 2020 | -12.6 | -8.4 | 2.8 | 16.8 | 13.8 | 2.0 | 3.2 | -6.5 | -13.5 | -5.3 | 10.0 | 14.9 |
| 2019 | -6.7 | 11.8 | -0.7 | 0.4 | -1.6 | 19.9 | -18.7 | -6.0 | 8.1 | -2.9 | 8.5 | 3.4 |
| 2018 | 6.5 | -2.0 | 3.7 | 1.9 | 13.1 | 2.5 | 16.1 | 9.4 | 3.5 | -15.2 | 8.5 | -11.1 |
| 2017 | 25.0 | 4.6 | 1.9 | 8.3 | -4.1 | -2.2 | 0.2 | 17.6 | -2.6 | 3.0 | 12.1 | -5.0 |
| 2016 | -17.7 | -4.9 | 7.9 | -16.7 | 7.3 | -3.1 | 18.5 | 1.2 | 7.9 | -25.1 | -2.2 | -3.8 |
| 2015 | 5.8 | 0.1 | -5.0 | -0.8 | 11.8 | 6.0 | 0.4 | -9.9 | -11.0 | -18.5 | 28.4 | 4.4 |
| 2014 | 37.4 | 12.8 | -13.3 | -8.6 | 16.5 | 12.8 | -10.4 | 12.2 | -8.6 | 17.5 | -0.9 | -3.3 |
| 2013 | -8.9 | -1.0 | 7.7 | 19.8 | 8.7 | 6.4 | 6.7 | -2.5 | 3.8 | 15.7 | 4.8 | 12.8 |
| 2012 | 70.1 | -1.2 | 2.6 | -15.4 | -3.3 | -6.2 | 2.7 | 1.5 | 14.5 | -1.4 | 13.1 | 3.5 |
| 2011 | 9.5 | 0.1 | 1.0 | 1.3 | 1.6 | 4.3 | -16.9 | -16.6 | -21.5 | -25.2 | -9.1 | 9.6 |
| 2010 | 19.6 | -1.0 | 7.1 | 7.5 | 0.5 | 3.5 | 3.0 | -4.3 | 14.7 | 10.4 | 10.7 | 5.4 |
| 2009 | 5.0 | 14.5 | 18.9 | 0.3 | -1.7 | 6.1 | -7.2 | -2.4 | 20.5 | -24.5 | -9.9 | 6.1 |
| 2008 | 7.5 | 13.7 | 4.8 | 2.6 | 0.8 | 11.0 | 7.0 | -7.6 | -5.9 | -23.9 | -28.6 | 18.4 |
| 2007 | 3.9 | -17.8 | -12.8 | 11.4 | 0.0 | 24.4 | 12.3 | 6.0 | 7.4 | 8.2 | 2.9 | 2.5 |
| 2006 | 52.1 | 18.6 | -6.6 | 33.2 | -13.6 | 8.5 | 28.9 | -11.9 | -1.9 | 33.0 | -12.6 | 2.3 |
| 2005 | 2.2 | -14.7 | -2.3 | 21.5 | 6.9 | 14.9 | -7.2 | 8.9 | 5.0 | 21.6 | 1.2 | -10.5 |
| 2004 | 24.1 | -22.4 | 10.5 | 0.1 | -15.6 | -0.2 | -18.6 | 11.7 | 2.8 | 9.1 | 17.8 | 24.7 |
| 2003 | -11.0 | -19.7 | -6.2 | -11.9 | 73.4 | -18.6 | 8.9 | 17.6 | 48.6 | 13.1 | 13.4 | 2.8 |
| 2002 | -28.1 | -18.8 | 37.9 | -11.2 | -23.8 | 5.0 | -33.8 | -11.7 | -12.5 | 18.6 | 22.6 | -32.6 |
| 2001 | 30.7 | -28.6 | -52.9 | 18.2 | 36.5 | 3.3 | -2.8 | -23.2 | -26.1 | 54.0 | -0.5 | 18.1 |
| 2000 | · | · | · | · | · | · | -10.7 | 27.9 | 1.4 | -28.4 | -43.6 | -12.3 |
| Avg | 9.2 | -4.5 | -0.1 | 1.7 | 4.9 | 4.5 | 1.8 | -0.3 | -0.2 | 2.9 | 1.1 | 2.9 |
| Median | 5.8 | -2.1 | 1.5 | 0.9 | 1.2 | 4.6 | 3.0 | -2.5 | -1.3 | 5.6 | 2.0 | 3.1 |
September so far: +12.2% against an average of -0.2% and a median of -1.3% across 26 completed Septembers, 12 of them positive.
Values in %. Current and first-listed months are partial (greyed) and are left out of the Avg and Median rows.
returnsview.com
ILMN seasonality — average by calendar month
Illumina, Inc. has monthly history back to 2000. Its strongest month by median is January — positive in 18 of 26 years, median +5.8%, and higher in 5 of the last 9. August is the soft spot, down in 15 of 27 with a median of -2.5%. Across its full record it has closed 57% of months higher, swings ±15.8% in an average month and has fallen 96.1% peak to trough.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg | +9.2% | -4.5% | -0.1% | +1.7% | +4.8% | +4.5% | +1.8% | -0.3% | -0.2% | +2.9% | +1.1% | +2.9% |
| Win rate | 69%/26 | 35%/26 | 54%/26 | 62%/26 | 58%/26 | 73%/26 | 67%/27 | 44%/27 | 46%/26 | 58%/26 | 58%/26 | 62%/26 |
Win rate = share of positive months / sample size.
ILMN risk & extremes
ILMN 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 Illumina, Inc.'s best month?+
Illumina, Inc.'s strongest completed month on record is May 2003, at +73.37%.
What was Illumina, Inc.'s worst month?+
Its weakest completed month on record is March 2001, at -52.92%.
Is Illumina, Inc. up this year?+
Illumina, Inc. is up 82.69% year to date, measured from its last close before 1 January.
What is Illumina, Inc.'s 1-year return?+
+132.57% 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 Illumina, Inc.'s biggest drawdown?+
The deepest peak-to-trough fall on record is 96.1%, measured on month-end closes since 2000.
Which calendar month is historically best for Illumina, Inc.?+
January has the highest average return across every completed January since 2000. An average is not a forecast.
About Illumina, Inc.
Illumina, Inc. is an S&P 500 company, a health care business worth about $36 billion. It turns lab coats into cash flows — with price receipts on this site going back to 2000. And the long game: $100 at its first close here (2000) would be about $1,255 today.
Did you know?
- Its best month on record was May 2003 at +73.37%; its worst, March 2001 at -52.92%.
- It has closed June in the green 19 out of 26 times — past performance, future shrug.
Trivia for entertainment — the numbers come from our price data; the jokes don't.