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 Software5.97%+3.08 ppSemiconductors3.23%+1.49 ppApplication Software3.15%+1.39 ppTechnology Hardware, Storage & Peripherals1.96%+0.93 ppIT Consulting & Other Services1.47%+0.58 ppCommunications Equipment1.16%+0.34 ppSemiconductor Materials & Equipment0.30%+0.17 ppElectronic Equipment & Instruments0.29%+0.15 ppTechnology Distributors0.10%+0.10 ppInternet Services & Infrastructure0.18%+0.08 ppElectronic Manufacturing Services0.16%+0.07 ppElectronic Components0.13%+0.04 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
5.97%
Industry change · 12M
+3.08 pp
Systems Software · contribution
+3.085 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2019 · 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 | $1154.8bn | 5.818% | +0.093 pp | +2.990 pp | +38.5% | Yes |
| ServiceNow → NOW | United States | $10.7bn | 0.054% | +0.054 pp | +0.054 pp | +52.8% | Yes |
| Gen Digital → GEN | United States | $15.5bn | 0.078% | +0.000 pp | +0.031 pp | +14.4% | Yes |
| Fortinet → FTNT | United States | $3.6bn | 0.018% | +0.003 pp | +0.010 pp | +42.3% | 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.