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
Systems Software9.23%+2.66 ppApplication Software3.96%+0.91 ppSemiconductors4.03%+0.77 ppTechnology Hardware, Storage & Peripherals8.82%+0.66 ppIT Consulting & Other Services1.41%+0.17 ppSemiconductor Materials & Equipment0.51%+0.09 ppElectronic Equipment & Instruments0.35%-0.04 ppElectronic Manufacturing Services0.18%+0.04 ppCommunications Equipment0.86%-0.04 ppElectronic Components0.13%-0.01 ppInternet Services & Infrastructure0.12%-0.01 ppTechnology Distributors0.09%-0.00 pp
3 · Sub-industry
Inside Electronic Manufacturing Services
Electronic Manufacturing Services · weight
0.18%
Industry change · 12M
+0.04 pp
Electronic Manufacturing Services · contribution
+0.040 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 | $16.0bn | 0.048% | +0.048 pp | +0.048 pp | +59.9% | Yes |
| TE Connectivity → TEL | United States | $43.9bn | 0.131% | +0.005 pp | -0.007 pp | +13.9% | 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.