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
1.49%
Industry change · 12M
+0.11 pp
Communications Equipment · contribution
+0.105 pp
Company participation
75%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 2019 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Cisco →
CSCO
United States$222.7bn1.297%-0.024 pp+0.078 pp+25.3%Yes
Motorola Solutions →
MSI
United States$24.7bn0.144%+0.008 pp+0.038 pp+42.1%Yes
F5, Inc. →
FFIV
United States$7.9bn0.046%-0.012 pp-0.018 pp-23.7%No
Arista Networks →
ANET
United States$1.2bn0.007%-0.001 pp+0.007 pp-2.8%Yes

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.