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2026-08-26 · session in progress, unofficial until close

IRON MOUNTAIN INC (IRM) and the market

Exact index points IRM contributed this session, under each index's own arithmetic, verified against official closes. New here? Read point contribution, explained.

How much did IRM move each index today?

S&P 500: IRM moved +0.31% and contributed +0.0 points of the index's +1.9-point move, ranking #241 of 503 members by contribution to the move.

XLRE: IRM moved +0.31% and contributed +0.01 points against the index's −0.23-point move, offsetting 2% of it, ranking #27 of 30 members by contribution to the move.

IRM closed the 2026-08-25 session at 120.93; that day's move sits in the 40th percentile of its own past year. The stock is 9.1% below its 52-week closing high and +48.0% for the year so far.

IRM in the S&P 500 beyond today

windowIRM returnpoints contributedindex moverank
1 week−4.53%−0.2 pts−14.5 pts#93 of 503
1 month−4.77%−0.2 pts+264.1 pts#382 of 503
quarter to date−4.26%−0.2 pts+177.9 pts#366 of 503
year to date+47.96%+1.3 pts+831.8 pts#122 of 503

Who moved with and against IRM today?

On IRM's side of the S&P 500 tape: AAPL (+6.1 pts), MSFT (+3.8 pts), META (+1.5 pts). Pulling the other way: NVDA (−8.6 pts), LLY (−4.1 pts), GOOGL (−3.4 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/IRM, free to cite with attribution.

Compiled by the WMTMT attribution engine · updates every session · methodology