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
Semiconductors15.34%+4.26 ppApplication Software2.45%-1.03 ppSemiconductor Materials & Equipment1.19%+0.57 ppSystems Software6.78%-0.52 ppIT Consulting & Other Services0.97%-0.28 ppCommunications Equipment1.09%+0.26 ppTechnology Hardware, Storage & Peripherals7.94%-0.21 ppElectronic Components0.34%+0.14 ppElectronic Equipment & Instruments0.23%-0.08 ppInternet Services & Infrastructure0.10%-0.05 ppElectronic Manufacturing Services0.17%+0.04 ppTechnology Distributors0.03%-0.03 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
0.97%
Industry change · 12M
-0.28 pp
IT Consulting & Other Services · contribution
-0.281 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 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 |
|---|---|---|---|---|---|---|---|
| Accenture → ACN | United States | $167.9bn | 0.321% | +0.009 pp | -0.224 pp | -30.8% | No |
| Gartner → IT | United States | $15.1bn | 0.029% | -0.008 pp | -0.064 pp | -61.4% | No |
| IBM → IBM | United States | $286.7bn | 0.548% | -0.014 pp | +0.023 pp | +23.0% | Yes |
| Cognizant → CTSH | United States | $39.6bn | 0.076% | +0.007 pp | -0.015 pp | +0.9% | 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.