How much did ILMN move each index today?
S&P 500: ILMN moved +5.14% and contributed +0.2 points of the index's +46.2-point move (1% of it), ranking #63 of 491 members by contribution to the move.
ARKK: ILMN moved +5.14% and contributed +0.04 points of the index's +2.02-point move (2% of it), ranking #20 of 39 members by contribution to the move.
XLV: ILMN moved +5.14% and contributed +0.06 points of the index's +2.66-point move (2% of it), ranking #15 of 59 members by contribution to the move.
ILMN closed the 2026-10-09 session at 278.17; that day's move sits in the 94th percentile of its own past year. The stock is 5.3% below its 52-week closing high and +112.1% for the year so far.
ILMN in the S&P 500 beyond today
| window | ILMN return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +1.88% | +0.1 pts | +88.8 pts | #201 of 503 |
| 1 month | +38.21% | +1.4 pts | +219.8 pts | #54 of 503 |
| quarter to date | +1.64% | +0.1 pts | +160.0 pts | #238 of 503 |
| year to date | +112.08% | +2.4 pts | +966.0 pts | #74 of 503 |
Who moved with and against ILMN today?
On ILMN's side of the S&P 500 tape: MSFT (+11.3 pts), AMZN (+10.0 pts), PLTR (+2.8 pts). Pulling the other way: AAPL (−7.0 pts), NVDA (−3.7 pts), VZ (−2.7 pts).
Every member's contribution, top to bottom, is on the index dashboards; the day's story is in the market-close note. Machine-readable figures for this stock: /api/stock/ILMN, free to cite with attribution.