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
Technology Hardware, Storage & Peripherals8.50%-1.23 ppSystems Software6.80%-1.15 ppSemiconductors3.32%-0.48 ppApplication Software3.00%-0.30 ppIT Consulting & Other Services1.21%-0.11 ppCommunications Equipment0.92%-0.09 ppSemiconductor Materials & Equipment0.44%-0.08 ppInternet Services & Infrastructure0.11%-0.03 ppElectronic Equipment & Instruments0.39%-0.02 ppElectronic Manufacturing Services0.14%-0.02 ppElectronic Components0.14%-0.02 ppTechnology Distributors0.10%+0.02 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
1.21%
Industry change · 12M
-0.11 pp
IT Consulting & Other Services · contribution
-0.107 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2023 · 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 | $169.2bn | 0.595% | -0.056 pp | -0.104 pp | -14.7% | No |
| Cognizant → CTSH | United States | $31.9bn | 0.112% | +0.004 pp | -0.045 pp | -26.1% | No |
| IBM → IBM | United States | $117.3bn | 0.412% | -0.045 pp | +0.030 pp | +10.8% | No |
| Gartner → IT | United States | $25.9bn | 0.091% | -0.003 pp | +0.011 pp | +16.9% | 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.