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
Latest available · not live
20182026
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Semiconductors18.63%+3.92 ppApplication Software1.82%-1.73 ppTechnology Hardware, Storage & Peripherals9.60%+1.63 ppSemiconductor Materials & Equipment1.95%+1.21 ppCommunications Equipment1.54%+0.44 ppSystems Software7.87%-0.41 ppIT Consulting & Other Services0.61%-0.34 ppElectronic Components0.49%+0.20 ppElectronic Manufacturing Services0.22%+0.04 ppInternet Services & Infrastructure0.09%-0.02 ppTechnology Distributors0.03%-0.01 ppElectronic Equipment & Instruments0.24%-0.01 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
0.61%
Industry change · 12M
-0.34 pp
IT Consulting & Other Services · contribution
-0.336 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 |
|---|---|---|---|---|---|---|---|
| IBM → IBM | United States | $207.2bn | 0.348% | -0.111 pp | -0.178 pp | -20.0% | No |
| Accenture → ACN | United States | $116.8bn | 0.196% | +0.058 pp | -0.118 pp | -24.1% | Yes |
| Gartner → IT | United States | $11.8bn | 0.020% | +0.005 pp | -0.020 pp | -29.0% | Yes |
| Cognizant → CTSH | United States | $27.2bn | 0.046% | +0.014 pp | -0.020 pp | -12.4% | 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.