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 Software5.79%+2.96 ppSemiconductors3.26%+1.48 ppApplication Software3.07%+1.32 ppTechnology Hardware, Storage & Peripherals1.90%+0.66 ppIT Consulting & Other Services1.45%+0.59 ppCommunications Equipment1.25%+0.43 ppElectronic Equipment & Instruments0.28%+0.18 ppSemiconductor Materials & Equipment0.30%+0.17 ppTechnology Distributors0.10%+0.10 ppInternet Services & Infrastructure0.19%+0.09 ppElectronic Manufacturing Services0.16%+0.07 ppElectronic Components0.14%+0.04 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
5.79%
Industry change · 12M
+2.96 pp
Systems Software · contribution
+2.961 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $1093.7bn | 5.701% | +0.144 pp | +2.922 pp | +36.3% | Yes |
| Gen Digital → GEN | United States | $14.1bn | 0.074% | +0.003 pp | +0.034 pp | +27.8% | Yes |
| Fortinet → FTNT | United States | $2.8bn | 0.015% | -0.000 pp | +0.005 pp | -0.8% | 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.