BlackRock

BLK · United States · Asset Management & Custody Banks · matched S&P 500 member. Follow its market-weight contribution.

Historical time machine

Historical observation

20182026

Universe weight

0.295%

12M weight contribution

-0.066 pp

3M weight contribution

+0.071 pp

12M price return

+0.7%

Share of matched S&P 500 members

Monthly observations through Jul 2026

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
Jul 2026	$168.9bn	0.295%	-0.066 pp	+0.7%	Yes
Jun 2026	$149.0bn	0.259%	-0.092 pp	-6.4%	Yes
May 2026	$162.2bn	0.281%	-0.063 pp	+9.0%	Yes
Apr 2026	$165.1bn	0.224%	-0.117 pp	+19.0%	No
Mar 2026	$149.0bn	0.217%	-0.132 pp	+3.7%	No
Feb 2026	$164.7bn	0.226%	-0.113 pp	+11.0%	No
Jan 2026	$173.4bn	0.332%	-0.039 pp	+6.2%	No
Dec 2025	$165.8bn	0.325%	-0.035 pp	+6.6%	No
Nov 2025	$162.3bn	0.319%	-0.031 pp	+4.5%	No
Oct 2025	$167.8bn	0.329%	+0.329 pp	+12.6%	No
Sep 2025	$180.6bn	0.362%	+0.362 pp	+25.3%	Yes
Aug 2025	$174.6bn	0.362%	+0.362 pp	+27.7%	Yes
Jul 2025	$171.3bn	0.361%	+0.361 pp	+28.9%	Yes
Jun 2025	$162.6bn	0.351%	+0.351 pp	+36.2%	Yes
May 2025	$151.8bn	0.344%	+0.344 pp	+29.9%	No
Apr 2025	$141.9bn	0.341%	+0.341 pp	+24.0%	No
Mar 2025	$146.9bn	0.349%	+0.349 pp	+16.2%	Yes
Feb 2025	$151.8bn	0.339%	+0.339 pp	+23.4%	Yes
Jan 2025	$166.6bn	0.370%	+0.370 pp	+42.2%	Yes
Dec 2024	$158.8bn	0.360%	+0.360 pp	+29.3%	Yes
Nov 2024	$158.4bn	0.350%	+0.350 pp	+39.6%	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.