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 & Peripherals6.94%-2.37 ppSystems Software5.74%-1.60 ppSemiconductors2.61%-0.85 ppApplication Software2.56%-0.58 ppIT Consulting & Other Services0.86%-0.41 ppCommunications Equipment0.61%-0.23 ppElectronic Equipment & Instruments0.25%-0.14 ppSemiconductor Materials & Equipment0.35%-0.06 ppElectronic Components0.09%-0.05 ppElectronic Manufacturing Services0.10%-0.05 ppInternet Services & Infrastructure0.08%-0.04 ppTechnology Distributors0.05%-0.03 pp
3 · Sub-industry
Inside Electronic Components
Electronic Components · weight
0.09%
Industry change · 12M
-0.05 pp
Electronic Components · contribution
-0.054 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 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 |
|---|---|---|---|---|---|---|---|
| Corning Inc. → GLW | United States | $29.0bn | 0.063% | -0.032 pp | -0.044 pp | -4.6% | No |
| Amphenol → APH | United States | $13.2bn | 0.029% | -0.009 pp | -0.011 pp | +15.7% | 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.