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 & Peripherals9.07%+1.21 ppSystems Software7.47%+0.59 ppApplication Software3.05%-0.52 ppSemiconductors3.74%+0.29 ppSemiconductor Materials & Equipment0.48%-0.11 ppCommunications Equipment0.87%-0.10 ppIT Consulting & Other Services1.35%+0.06 ppInternet Services & Infrastructure0.13%-0.03 ppElectronic Components0.15%-0.02 ppElectronic Equipment & Instruments0.40%-0.02 ppElectronic Manufacturing Services0.15%-0.01 ppTechnology Distributors0.08%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.87%
Industry change · 12M
-0.10 pp
Communications Equipment · contribution
-0.101 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $186.6bn | 0.672% | -0.132 pp | -0.127 pp | -12.6% | No |
| Arista Networks → ANET | United States | $7.9bn | 0.028% | -0.004 pp | +0.023 pp | +20.5% | Yes |
| Motorola Solutions → MSI | United States | $36.8bn | 0.132% | +0.004 pp | +0.008 pp | +8.4% | No |
| F5, Inc. → FFIV | United States | $9.9bn | 0.036% | -0.007 pp | -0.004 pp | -12.1% | 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.