Biogen

BIIB · United States · Biotechnology · matched S&P 500 member. Follow its market-weight contribution.

Historical time machine

Historical observation

20182026

Universe weight

0.144%

12M weight contribution

+0.031 pp

3M weight contribution

-0.008 pp

12M price return

+15.4%

Share of matched S&P 500 members

Monthly observations through Dec 2022

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
Dec 2022	$39.9bn	0.144%	+0.031 pp	+15.4%	Yes
Nov 2022	$43.9bn	0.149%	+0.032 pp	+29.5%	Yes
Oct 2022	$40.8bn	0.145%	+0.014 pp	+6.3%	Yes
Sep 2022	$38.7bn	0.152%	+0.004 pp	-5.7%	Yes
Aug 2022	$28.4bn	0.101%	-0.067 pp	-42.4%	No
Jul 2022	$31.2bn	0.107%	-0.060 pp	-34.2%	No
Jun 2022	$29.9bn	0.116%	-0.068 pp	-41.1%	Yes
May 2022	$29.3bn	0.105%	-0.039 pp	-25.2%	No
Apr 2022	$30.5bn	0.110%	-0.036 pp	-22.4%	No
Mar 2022	$31.0bn	0.104%	+0.021 pp	-24.7%	No
Feb 2022	$31.0bn	0.108%	+0.024 pp	-22.7%	No
Jan 2022	$33.2bn	0.112%	+0.007 pp	-20.0%	No
Dec 2021	$35.2bn	0.113%	-0.040 pp	-2.0%	No
Nov 2021	$34.6bn	0.117%	-0.040 pp	-1.8%	No
Oct 2021	$39.2bn	0.131%	-0.053 pp	+5.8%	No
Sep 2021	$42.2bn	0.148%	+0.148 pp	-0.2%	No
Aug 2021	$50.5bn	0.169%	+0.169 pp	+17.8%	Yes
Jul 2021	$48.7bn	0.167%	+0.167 pp	+18.9%	Yes
Jun 2021	$52.1bn	0.184%	+0.184 pp	+29.4%	Yes
May 2021	$40.3bn	0.144%	+0.144 pp	-12.9%	Yes
Apr 2021	$40.2bn	0.146%	-0.125 pp	-9.9%	Yes
Mar 2021	$42.6bn	0.083%	+0.083 pp	-11.6%	No
Feb 2021	$41.6bn	0.083%	+0.083 pp	-11.5%	No
Jan 2021	$43.5bn	0.104%	-0.135 pp	+5.1%	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.