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 & Peripherals9.96%+5.74 ppSystems Software7.94%+4.39 ppSemiconductors3.63%+1.70 ppApplication Software3.28%+1.51 ppIT Consulting & Other Services1.36%+0.68 ppCommunications Equipment1.00%+0.48 ppElectronic Equipment & Instruments0.41%+0.20 ppSemiconductor Materials & Equipment0.50%+0.19 ppInternet Services & Infrastructure0.15%+0.07 ppElectronic Components0.14%+0.07 ppElectronic Manufacturing Services0.14%+0.06 ppTechnology Distributors0.08%+0.04 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
1.00%
Industry change · 12M
+0.48 pp
Communications Equipment · contribution
+0.478 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 | $231.6bn | 0.780% | -0.077 pp | +0.353 pp | +10.8% | No |
| Motorola Solutions → MSI | United States | $40.7bn | 0.137% | -0.010 pp | +0.075 pp | +30.5% | No |
| Arista Networks → ANET | United States | $10.7bn | 0.036% | +0.027 pp | +0.033 pp | +84.1% | Yes |
| F5, Inc. → FFIV | United States | $12.7bn | 0.043% | -0.005 pp | +0.018 pp | +0.2% | 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.