Observatory · observe first

Follow the allocation change

Matched S&P 500 members → sector → industry → sub-industry → company. Each step uses the same percentage points.

Historical time machine
Historical observation
20182026
Universe›Information Technology›Communications Equipment›Communications Equipment
Communications Equipment · weight
0.52%
Industry change · 12M
+0.52 pp
Communications Equipment · contribution
+0.516 pp
Company participation
0%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Mar 2021 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Cisco →
CSCO
United States$218.3bn0.427%-0.338 pp+0.426 pp+36.2%No
Motorola Solutions →
MSI
United States$31.8bn0.062%-0.055 pp+0.062 pp+43.9%No
F5, Inc. →
FFIV
United States$12.9bn0.025%-0.019 pp+0.025 pp+95.6%No
Arista Networks →
ANET
United States$1.4bn0.003%-0.003 pp+0.003 pp+49.0%No

Company contributions use weights among matched S&P 500 members and add through each level without rescaling. Companies without matched shares and prices are omitted. These observations do not establish official index weights or actual fund flows.