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

Materials27.4%+25.10 pp Energy2.1%-0.32 pp Communication Services2.0%-0.81 pp Utilities2.0%-0.92 pp Real Estate1.6%-0.95 pp Industrials7.6%-2.27 pp Consumer Discretionary8.9%-2.59 pp Consumer Staples4.7%-2.85 pp Financials7.8%-4.44 pp Information Technology28.4%-4.69 pp Health Care7.4%-5.25 pp

2 · Industry

Inside Information Technology

Systems Software4.57%-3.11 pp Semiconductors12.72%+2.06 pp Technology Hardware, Storage & Peripherals6.16%-1.79 pp Application Software1.58%-1.68 pp IT Consulting & Other Services0.50%-0.67 pp Semiconductor Materials & Equipment1.01%+0.44 pp Electronic Components0.40%+0.19 pp Electronic Equipment & Instruments0.19%-0.10 pp Internet Services & Infrastructure0.07%-0.09 pp Communications Equipment1.10%+0.08 pp Technology Distributors0.02%-0.03 pp Electronic Manufacturing Services0.13%-0.01 pp

3 · Sub-industry

Inside Communications Equipment

Communications Equipment1.10%+0.083 pp

Concentrated

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

View all contributions →

Communications Equipment · weight

1.10%

Industry change · 12M

+0.08 pp

Communications Equipment · contribution

+0.083 pp

Company participation

50%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Apr 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
Ciena → CIEN	United States	$74.6bn	0.101%	+0.101 pp	+0.101 pp	+685.6%	Yes
Lumentum → LITE	United States	$64.4bn	0.087%	+0.087 pp	+0.087 pp	+1428.3%	Yes
Motorola Solutions → MSI	United States	$72.7bn	0.099%	-0.030 pp	-0.078 pp	+0.8%	No
Cisco → CSCO	United States	$361.4bn	0.490%	-0.102 pp	-0.061 pp	+62.1%	No
Arista Networks → ANET	United States	$217.0bn	0.294%	-0.047 pp	+0.045 pp	+109.9%	Yes
F5, Inc. → FFIV	United States	$18.3bn	0.025%	-0.006 pp	-0.012 pp	+22.3%	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.