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 & Peripherals7.61%-1.58 ppSystems Software9.07%+1.47 ppSemiconductors4.31%+0.69 ppApplication Software3.77%+0.45 ppCommunications Equipment0.82%-0.15 ppSemiconductor Materials & Equipment0.58%+0.13 ppIT Consulting & Other Services1.30%+0.08 ppElectronic Equipment & Instruments0.34%-0.04 ppElectronic Manufacturing Services0.17%+0.03 ppInternet Services & Infrastructure0.10%-0.02 ppElectronic Components0.13%-0.02 ppTechnology Distributors0.10%+0.01 pp
3 · Sub-industry
Inside Electronic Manufacturing Services
Electronic Manufacturing Services · weight
0.17%
Industry change · 12M
+0.03 pp
Electronic Manufacturing Services · contribution
+0.030 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 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 |
|---|---|---|---|---|---|---|---|
| Jabil → JBL | United States | $17.1bn | 0.047% | -0.001 pp | +0.047 pp | +52.4% | Yes |
| TE Connectivity → TEL | United States | $44.9bn | 0.124% | -0.006 pp | -0.017 pp | +12.8% | 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.