How much did AON move each index today?
S&P 500: AON moved +0.07% and contributed +0.0 points of the index's +6.9-point move (0% of it), ranking #207 of 490 members by contribution to the move.
XLF: AON moved +0.07% and contributed +0.00 points against the index's −0.04-point move, offsetting 1% of it, ranking #38 of 75 members by contribution to the move.
AON closed the 2026-10-12 session at 274.69; that day's move sits in the 64th percentile of its own past year. The stock is 28.0% below its 52-week closing high and −21.8% for the year so far.
AON in the S&P 500 beyond today
| window | AON return | points contributed | index move | rank |
|---|---|---|---|---|
| 1 week | +0.97% | +0.0 pts | +33.3 pts | #245 of 503 |
| 1 month | −9.25% | −0.7 pts | +150.3 pts | #454 of 503 |
| quarter to date | −0.75% | −0.1 pts | +155.7 pts | #430 of 503 |
| year to date | −21.79% | −2.8 pts | +961.7 pts | #469 of 503 |
Who moved with and against AON today?
On AON's side of the S&P 500 tape: AAPL (+7.5 pts), MSFT (+7.2 pts), META (+6.5 pts). Pulling the other way: MU (−5.8 pts), JNJ (−3.3 pts), NVDA (−2.3 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/AON, free to cite with attribution.