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Observatory · observe first

Interactive Brokers

IBKR · United States · Investment Banking & Brokerage · matched S&P 500 member. Follow its market-weight contribution.

Historical time machine
Historical observation
20182026
Universe weight
0.006%
12M weight contribution
+0.006 pp
3M weight contribution
+0.006 pp
12M price return
+85.4%

Share of matched S&P 500 members

Monthly observations through Oct 2025

0.00.00.0

Company price index

A separate dimension from market allocation

410435460

Historical observations

Most recent 24 observations at or before the selected month

MonthMarket capUniverse weight12M weight change12M returnAbove 6M weight average
Oct 2025$3.0bn0.006%+0.006 pp+85.4%Yes
Sep 2025$2.9bn0.006%+0.006 pp+98.6%Yes
Aug 2025$2.6bn0.005%+0.005 pp+94.2%Yes

Its weight is estimated market cap divided by the total estimated market cap of matched S&P 500 members for the month. This is not an official float-adjusted S&P index weight.