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

Latest available · not live

20182026

Universe›Information Technology›Communications Equipment›Communications Equipment

1 · Sector

Weight and 12M allocation change

Information Technology43.1%+4.93 pp Energy3.8%+1.55 pp Health Care10.6%+0.26 pp Materials1.9%-0.22 pp Communication Services2.1%-0.27 pp Real Estate1.8%-0.35 pp Industrials9.1%-0.58 pp Utilities2.1%-0.61 pp Consumer Staples5.4%-0.78 pp Consumer Discretionary10.3%-1.78 pp Financials9.7%-2.16 pp

2 · Industry

Inside Information Technology

Semiconductors18.63%+3.92 pp Application Software1.82%-1.73 pp Technology Hardware, Storage & Peripherals9.60%+1.63 pp Semiconductor Materials & Equipment1.95%+1.21 pp Communications Equipment1.54%+0.44 pp Systems Software7.87%-0.41 pp IT Consulting & Other Services0.61%-0.34 pp Electronic Components0.49%+0.20 pp Electronic Manufacturing Services0.22%+0.04 pp Internet Services & Infrastructure0.09%-0.02 pp Technology Distributors0.03%-0.01 pp Electronic Equipment & Instruments0.24%-0.01 pp

3 · Sub-industry

Inside Communications Equipment

Communications Equipment1.54%+0.443 pp

Concentrated

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

View all contributions →

Communications Equipment · weight

1.54%

Industry change · 12M

+0.44 pp

Communications Equipment · contribution

+0.443 pp

Company participation

67%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Sep 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	$424.3bn	0.713%	-0.092 pp	+0.171 pp	+60.6%	No
Lumentum → LITE	United States	$87.1bn	0.146%	+0.030 pp	+0.146 pp	+496.9%	Yes
Ciena → CIEN	United States	$49.9bn	0.084%	-0.037 pp	+0.084 pp	+141.5%	No
Arista Networks → ANET	United States	$256.8bn	0.431%	+0.060 pp	+0.065 pp	+39.7%	Yes
Motorola Solutions → MSI	United States	$73.8bn	0.124%	+0.004 pp	-0.029 pp	-1.3%	Yes
F5, Inc. → FFIV	United States	$25.2bn	0.042%	+0.002 pp	+0.005 pp	+37.7%	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.