Marsh McLennan

MRSH · United States · Insurance Brokers · matched S&P 500 member. Follow its market-weight contribution.

Historical time machine

Historical observation

20182026

Universe weight

0.318%

12M weight contribution

+0.034 pp

3M weight contribution

+0.115 pp

12M price return

+19.1%

Share of matched S&P 500 members

Monthly observations through Oct 2023

Company price index

A separate dimension from market allocation

Historical observations

Most recent 24 observations at or before the selected month

Month	Market cap	Universe weight	12M weight change	12M return	Above 6M weight average
Oct 2023	$93.5bn	0.318%	+0.034 pp	+19.1%	Yes
Sep 2023	$94.0bn	0.314%	+0.021 pp	+29.3%	Yes
Aug 2023	$96.3bn	0.307%	+0.019 pp	+22.6%	Yes
Jul 2023	$93.1bn	0.203%	-0.078 pp	+16.6%	No
Jun 2023	$93.0bn	0.215%	-0.088 pp	+22.9%	No
May 2023	$85.7bn	0.212%	-0.077 pp	+9.8%	No
Apr 2023	$89.1bn	0.301%	+0.008 pp	+13.1%	Yes
Mar 2023	$82.4bn	0.281%	-0.007 pp	-0.9%	No
Feb 2023	$80.2bn	0.282%	+0.011 pp	+5.8%	No
Jan 2023	$86.8bn	0.297%	+0.036 pp	+15.5%	Yes
Dec 2022	$82.1bn	0.296%	+0.015 pp	-3.5%	Yes
Nov 2022	$85.9bn	0.292%	+0.012 pp	+7.1%	Yes
Oct 2022	$80.1bn	0.284%	+0.003 pp	-1.8%	No
Sep 2022	$74.5bn	0.293%	+0.023 pp	-0.0%	Yes
Aug 2022	$80.5bn	0.288%	+0.022 pp	+4.1%	No
Jul 2022	$81.8bn	0.281%	+0.025 pp	+12.9%	No
Jun 2022	$77.9bn	0.303%	+0.050 pp	+11.9%	Yes
May 2022	$80.3bn	0.289%	+0.037 pp	+17.2%	Yes
Apr 2022	$81.2bn	0.293%	+0.043 pp	+20.8%	Yes
Mar 2022	$85.7bn	0.288%	+0.167 pp	+41.9%	Yes
Feb 2022	$78.1bn	0.271%	+0.154 pp	+36.8%	No
Jan 2022	$77.6bn	0.261%	+0.127 pp	+41.8%	No
Dec 2021	$87.8bn	0.281%	+0.041 pp	+50.8%	Yes
Nov 2021	$82.8bn	0.280%	+0.033 pp	+45.3%	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.