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 Software8.26%+1.30 ppSemiconductors3.90%+0.48 ppTechnology Hardware, Storage & Peripherals9.72%+0.23 ppSemiconductor Materials & Equipment0.59%+0.14 ppCommunications Equipment1.06%+0.13 ppIT Consulting & Other Services1.47%+0.12 ppApplication Software3.73%+0.10 ppElectronic Equipment & Instruments0.45%+0.03 ppInternet Services & Infrastructure0.15%-0.02 ppTechnology Distributors0.09%+0.01 ppElectronic Components0.14%+0.01 ppElectronic Manufacturing Services0.17%+0.01 pp
3 · Sub-industry
Inside Technology Distributors
Technology Distributors · weight
0.09%
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
Dec 2021 · 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 | $27.8bn | 0.089% | +0.001 pp | +0.013 pp | +56.9% | 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.