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

1 · Sector

Weight and 12M allocation change

Information Technology39.9%+2.38 pp Energy2.7%+0.38 pp Health Care10.6%+0.37 pp Materials2.0%-0.11 pp Industrials9.9%-0.12 pp Real Estate2.1%-0.17 pp Communication Services2.2%-0.23 pp Utilities2.5%-0.34 pp Consumer Discretionary11.3%-0.38 pp Consumer Staples5.9%-0.60 pp Financials10.9%-1.19 pp

2 · Industry

Inside Information Technology

Semiconductors17.20%+2.80 pp Technology Hardware, Storage & Peripherals9.09%+2.20 pp Systems Software7.02%-1.93 pp Application Software1.80%-1.89 pp Semiconductor Materials & Equipment1.53%+0.91 pp Communications Equipment1.55%+0.46 pp IT Consulting & Other Services0.62%-0.37 pp Electronic Components0.47%+0.22 pp Electronic Manufacturing Services0.23%+0.06 pp Electronic Equipment & Instruments0.24%-0.03 pp Internet Services & Infrastructure0.09%-0.03 pp Technology Distributors0.03%-0.02 pp

3 · Sub-industry

Inside Communications Equipment

Communications Equipment1.55%+0.463 pp

Concentrated

Most of this industry's gains came from a few companies.

View all contributions →

Communications Equipment · weight

1.55%

Industry change · 12M

+0.46 pp

Communications Equipment · contribution

+0.463 pp

Company participation

83%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jul 2026 · sorted by absolute contribution to 12-month change

Company	Country	Market cap	Universe weight	3M contribution	12M contribution	12M price return	Above 6M weight average
Cisco → CSCO	United States	$457.2bn	0.798%	+0.308 pp	+0.229 pp	+73.9%	Yes
Lumentum → LITE	United States	$55.5bn	0.097%	+0.010 pp	+0.097 pp	+548.6%	Yes
Ciena → CIEN	United States	$53.4bn	0.093%	-0.008 pp	+0.093 pp	+306.1%	No
Arista Networks → ANET	United States	$227.1bn	0.396%	+0.102 pp	+0.070 pp	+46.4%	Yes
Motorola Solutions → MSI	United States	$72.3bn	0.126%	+0.028 pp	-0.028 pp	+0.4%	Yes
F5, Inc. → FFIV	United States	$22.7bn	0.040%	+0.015 pp	+0.002 pp	+28.4%	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.