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 & Peripherals9.98%+4.46 ppSystems Software8.00%+3.72 ppSemiconductors3.71%+1.62 ppApplication Software3.54%+1.45 ppIT Consulting & Other Services1.39%+0.65 ppCommunications Equipment0.97%+0.42 ppSemiconductor Materials & Equipment0.52%+0.24 ppElectronic Equipment & Instruments0.42%+0.17 ppElectronic Components0.16%+0.08 ppElectronic Manufacturing Services0.16%+0.06 ppInternet Services & Infrastructure0.14%+0.05 ppTechnology Distributors0.09%+0.04 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.97%
Industry change · 12M
+0.42 pp
Communications Equipment · contribution
+0.421 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 | $234.8bn | 0.790% | +0.001 pp | +0.339 pp | +28.3% | No |
| Motorola Solutions → MSI | United States | $39.2bn | 0.132% | -0.009 pp | +0.064 pp | +40.3% | No |
| F5, Inc. → FFIV | United States | $12.7bn | 0.043% | +0.000 pp | +0.014 pp | +6.0% | No |
| Arista Networks → ANET | United States | $2.4bn | 0.008% | +0.001 pp | +0.005 pp | +61.7% | 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.