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
Semiconductors18.72%+5.18 ppSystems Software5.78%-2.86 ppTechnology Hardware, Storage & Peripherals8.95%+2.01 ppApplication Software1.78%-1.78 ppSemiconductor Materials & Equipment2.20%+1.56 ppCommunications Equipment1.57%+0.52 ppIT Consulting & Other Services0.64%-0.51 ppElectronic Components0.70%+0.48 ppElectronic Manufacturing Services0.28%+0.12 ppInternet Services & Infrastructure0.09%-0.05 ppElectronic Equipment & Instruments0.24%-0.04 ppTechnology Distributors0.03%-0.02 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
0.64%
Industry change · 12M
-0.51 pp
IT Consulting & Other Services · contribution
-0.507 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jun 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 | $79.3bn | 0.138% | -0.046 pp | -0.273 pp | -57.8% | No |
| IBM → IBM | United States | $264.3bn | 0.459% | +0.128 pp | -0.131 pp | -2.2% | Yes |
| Gartner → IT | United States | $8.7bn | 0.015% | -0.001 pp | -0.052 pp | -67.9% | No |
| Cognizant → CTSH | United States | $18.4bn | 0.032% | -0.011 pp | -0.051 pp | -49.3% | No |
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.