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 & Peripherals9.19%-0.77 ppSystems Software7.60%-0.34 ppIT Consulting & Other Services1.22%-0.14 ppSemiconductor Materials & Equipment0.45%-0.05 ppApplication Software3.32%+0.04 ppInternet Services & Infrastructure0.12%-0.03 ppElectronic Equipment & Instruments0.39%-0.03 ppCommunications Equipment0.97%-0.03 ppTechnology Distributors0.09%+0.01 ppSemiconductors3.62%-0.01 ppElectronic Manufacturing Services0.14%-0.00 ppElectronic Components0.14%+0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.97%
Industry change · 12M
-0.03 pp
Communications Equipment · contribution
-0.028 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2023 · 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 | $214.1bn | 0.731% | +0.024 pp | -0.049 pp | -3.1% | Yes |
| Motorola Solutions → MSI | United States | $47.9bn | 0.163% | +0.008 pp | +0.026 pp | +19.8% | Yes |
| F5, Inc. → FFIV | United States | $8.8bn | 0.030% | -0.001 pp | -0.013 pp | -30.3% | No |
| Arista Networks → ANET | United States | $12.9bn | 0.044% | +0.010 pp | +0.008 pp | +20.8% | 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.