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
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Technology Hardware, Storage & Peripherals7.74%-1.98 ppSystems Software6.70%-1.56 ppSemiconductors3.02%-0.87 ppApplication Software2.86%-0.87 ppSemiconductor Materials & Equipment0.39%-0.20 ppIT Consulting & Other Services1.27%-0.19 ppCommunications Equipment0.93%-0.13 ppElectronic Equipment & Instruments0.39%-0.06 ppElectronic Manufacturing Services0.13%-0.04 ppInternet Services & Infrastructure0.13%-0.02 ppElectronic Components0.14%-0.01 ppTechnology Distributors0.09%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.93%
Industry change · 12M
-0.13 pp
Communications Equipment · contribution
-0.134 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2022 · 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 | $195.7bn | 0.706% | +0.060 pp | -0.150 pp | -22.5% | Yes |
| Arista Networks → ANET | United States | $9.3bn | 0.033% | -0.000 pp | +0.025 pp | -15.6% | Yes |
| F5, Inc. → FFIV | United States | $8.7bn | 0.031% | -0.003 pp | -0.017 pp | -41.4% | No |
| Motorola Solutions → MSI | United States | $43.1bn | 0.155% | +0.009 pp | +0.008 pp | -3.8% | 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.