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

Materials29.2%+26.88 pp Energy2.3%-0.54 pp Communication Services2.2%-0.64 pp Utilities2.1%-0.78 pp Real Estate1.6%-0.97 pp Industrials7.6%-2.18 pp Consumer Staples4.9%-2.47 pp Consumer Discretionary8.4%-3.06 pp Financials7.9%-4.65 pp Health Care8.0%-4.97 pp Information Technology25.9%-6.63 pp

2 · Industry

Inside Information Technology

Systems Software4.49%-2.69 pp Technology Hardware, Storage & Peripherals5.94%-2.26 pp Application Software1.63%-1.54 pp IT Consulting & Other Services0.57%-0.61 pp Semiconductor Materials & Equipment0.91%+0.36 pp Semiconductors10.63%+0.25 pp Electronic Components0.35%+0.16 pp Electronic Equipment & Instruments0.18%-0.12 pp Internet Services & Infrastructure0.07%-0.07 pp Communications Equipment0.95%-0.07 pp Technology Distributors0.02%-0.03 pp Electronic Manufacturing Services0.13%-0.01 pp

3 · Sub-industry

Inside Communications Equipment

Communications Equipment0.95%-0.072 pp

Concentrated

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

View all contributions →

Communications Equipment · weight

0.95%

Industry change · 12M

-0.07 pp

Communications Equipment · contribution

-0.072 pp

Company participation

33%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Mar 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	$306.5bn	0.446%	-0.150 pp	-0.137 pp	+28.8%	No
Ciena → CIEN	United States	$54.9bn	0.080%	+0.080 pp	+0.080 pp	+542.4%	Yes
Lumentum → LITE	United States	$50.2bn	0.073%	+0.073 pp	+0.073 pp	+1027.3%	Yes
Motorola Solutions → MSI	United States	$71.9bn	0.105%	-0.020 pp	-0.069 pp	+0.2%	No
F5, Inc. → FFIV	United States	$16.4bn	0.024%	-0.005 pp	-0.013 pp	+8.7%	No
Arista Networks → ANET	United States	$154.3bn	0.225%	-0.099 pp	-0.007 pp	+58.5%	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.