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 & Peripherals8.76%+8.76 ppSystems Software7.76%+7.75 ppApplication Software4.02%+4.02 ppSemiconductors3.50%+3.50 ppIT Consulting & Other Services1.34%+1.34 ppCommunications Equipment1.02%+1.02 ppSemiconductor Materials & Equipment0.52%+0.52 ppElectronic Equipment & Instruments0.46%+0.46 ppElectronic Manufacturing Services0.16%+0.16 ppElectronic Components0.15%+0.15 ppInternet Services & Infrastructure0.14%+0.14 ppTechnology Distributors0.09%+0.09 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.76%
Industry change · 12M
+7.75 pp
Systems Software · contribution
+7.749 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 2021 · 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 |
|---|---|---|---|---|---|---|---|
| Microsoft → MSFT | United States | $2268.6bn | 7.586% | +0.849 pp | +7.578 pp | +35.1% | Yes |
| ServiceNow → NOW | United States | $25.5bn | 0.085% | +0.018 pp | +0.085 pp | +33.5% | Yes |
| Gen Digital → GEN | United States | $15.4bn | 0.052% | -0.006 pp | +0.052 pp | +15.4% | Yes |
| Fortinet → FTNT | United States | $10.3bn | 0.034% | +0.009 pp | +0.034 pp | +138.7% | 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.