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
Semiconductors12.18%+8.17 ppSystems Software7.54%-1.19 ppTechnology Hardware, Storage & Peripherals8.85%-0.38 ppApplication Software3.51%-0.29 ppIT Consulting & Other Services1.14%-0.19 ppElectronic Equipment & Instruments0.28%-0.08 ppSemiconductor Materials & Equipment0.58%+0.07 ppElectronic Components0.19%+0.07 ppElectronic Manufacturing Services0.13%-0.05 ppTechnology Distributors0.05%-0.04 ppCommunications Equipment0.82%-0.03 ppInternet Services & Infrastructure0.14%+0.02 pp
3 · Sub-industry
Inside Electronic Components
Electronic Components · weight
0.19%
Industry change · 12M
+0.07 pp
Electronic Components · contribution
+0.066 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2024 · 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 |
|---|---|---|---|---|---|---|---|
| Amphenol → APH | United States | $41.9bn | 0.095% | +0.004 pp | +0.051 pp | +41.3% | Yes |
| Corning Inc. → GLW | United States | $40.7bn | 0.092% | +0.002 pp | +0.015 pp | +60.6% | 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.