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
Semiconductors17.29%+3.19 ppTechnology Hardware, Storage & Peripherals8.93%+1.44 ppApplication Software2.00%-1.38 ppSemiconductor Materials & Equipment1.75%+1.16 ppSystems Software7.68%-0.69 ppCommunications Equipment1.54%+0.41 ppIT Consulting & Other Services0.64%-0.29 ppElectronic Components0.47%+0.21 ppElectronic Manufacturing Services0.22%+0.05 ppInternet Services & Infrastructure0.09%-0.03 ppElectronic Equipment & Instruments0.24%-0.02 ppTechnology Distributors0.03%-0.01 pp
3 · Sub-industry
Inside Technology Distributors
Technology Distributors · weight
0.03%
Industry change · 12M
-0.01 pp
Technology Distributors · contribution
-0.013 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2026 · 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 |
|---|---|---|---|---|---|---|---|
| CDW Corporation → CDW | United States | $19.0bn | 0.032% | +0.004 pp | -0.013 pp | -6.1% | 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.