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
Semiconductors10.38%+6.07 ppSystems Software7.19%-1.88 ppApplication Software3.16%-0.61 ppTechnology Hardware, Storage & Peripherals8.20%+0.59 ppCommunications Equipment1.02%+0.21 ppIT Consulting & Other Services1.19%-0.12 ppElectronic Components0.19%+0.06 ppInternet Services & Infrastructure0.15%+0.05 ppTechnology Distributors0.05%-0.04 ppElectronic Equipment & Instruments0.30%-0.04 ppElectronic Manufacturing Services0.14%-0.04 ppSemiconductor Materials & Equipment0.55%-0.03 pp
3 · Sub-industry
Inside IT Consulting & Other Services
IT Consulting & Other Services · weight
1.19%
Industry change · 12M
-0.12 pp
IT Consulting & Other Services · contribution
-0.116 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Mar 2025 · 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 | $198.8bn | 0.472% | -0.036 pp | -0.140 pp | -8.5% | No |
| IBM → IBM | United States | $230.6bn | 0.547% | +0.086 pp | +0.062 pp | +34.6% | Yes |
| Gartner → IT | United States | $32.2bn | 0.077% | -0.008 pp | -0.027 pp | -11.9% | No |
| Cognizant → CTSH | United States | $37.8bn | 0.090% | +0.003 pp | -0.011 pp | +6.0% | 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.