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 Software4.57%-3.11 ppSemiconductors12.72%+2.06 ppTechnology Hardware, Storage & Peripherals6.16%-1.79 ppApplication Software1.58%-1.68 ppIT Consulting & Other Services0.50%-0.67 ppSemiconductor Materials & Equipment1.01%+0.44 ppElectronic Components0.40%+0.19 ppElectronic Equipment & Instruments0.19%-0.10 ppInternet Services & Infrastructure0.07%-0.09 ppCommunications Equipment1.10%+0.08 ppTechnology Distributors0.02%-0.03 ppElectronic Manufacturing Services0.13%-0.01 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
0.50%
Industry change · 12M
-0.67 pp
IT Consulting & Other Services · contribution
-0.665 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 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 | $113.8bn | 0.154% | -0.167 pp | -0.303 pp | -39.5% | No |
| IBM → IBM | United States | $217.1bn | 0.295% | -0.254 pp | -0.245 pp | -2.1% | No |
| Gartner → IT | United States | $10.5bn | 0.014% | -0.015 pp | -0.063 pp | -64.7% | No |
| Cognizant → CTSH | United States | $25.1bn | 0.034% | -0.042 pp | -0.053 pp | -26.8% | 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.