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 & Peripherals9.61%+1.23 ppSystems Software7.66%+0.63 ppApplication Software3.07%-0.48 ppSemiconductor Materials & Equipment0.45%-0.11 ppSemiconductors3.39%-0.07 ppIT Consulting & Other Services1.36%+0.04 ppElectronic Components0.15%-0.03 ppInternet Services & Infrastructure0.14%-0.02 ppElectronic Manufacturing Services0.15%-0.02 ppTechnology Distributors0.08%-0.01 ppCommunications Equipment0.93%-0.01 ppElectronic Equipment & Instruments0.42%-0.01 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.93%
Industry change · 12M
-0.01 pp
Communications Equipment · contribution
-0.007 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 | $203.5bn | 0.736% | -0.054 pp | -0.043 pp | -1.2% | No |
| Arista Networks → ANET | United States | $8.9bn | 0.032% | +0.024 pp | +0.027 pp | +46.7% | Yes |
| Motorola Solutions → MSI | United States | $35.9bn | 0.130% | -0.002 pp | +0.015 pp | +15.0% | No |
| F5, Inc. → FFIV | United States | $10.2bn | 0.037% | -0.006 pp | -0.005 pp | -10.4% | 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.