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 & Peripherals9.73%+5.45 ppSystems Software7.95%+4.37 ppSemiconductors3.80%+1.96 ppApplication Software3.30%+1.52 ppIT Consulting & Other Services1.32%+0.69 ppCommunications Equipment1.01%+0.54 ppSemiconductor Materials & Equipment0.52%+0.24 ppElectronic Equipment & Instruments0.41%+0.20 ppElectronic Components0.16%+0.09 ppElectronic Manufacturing Services0.16%+0.07 ppInternet Services & Infrastructure0.14%+0.07 ppTechnology Distributors0.08%+0.04 pp
3 · Sub-industry
Inside Electronic Components
Electronic Components · weight
0.16%
Industry change · 12M
+0.09 pp
Electronic Components · contribution
+0.090 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 |
|---|---|---|---|---|---|---|---|
| Corning Inc. → GLW | United States | $34.2bn | 0.119% | +0.012 pp | +0.060 pp | +8.3% | Yes |
| Amphenol → APH | United States | $11.4bn | 0.039% | -0.001 pp | +0.030 pp | +22.0% | 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.