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 Software6.56%+3.86 ppSemiconductors3.36%+1.68 ppApplication Software3.25%+1.49 ppTechnology Hardware, Storage & Peripherals2.12%+1.16 ppIT Consulting & Other Services1.48%+0.60 ppCommunications Equipment1.15%+0.35 ppElectronic Equipment & Instruments0.35%+0.20 ppSemiconductor Materials & Equipment0.30%+0.16 ppInternet Services & Infrastructure0.19%+0.09 ppTechnology Distributors0.09%+0.09 ppElectronic Manufacturing Services0.15%+0.06 ppElectronic Components0.12%+0.02 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.56%
Industry change · 12M
+3.86 pp
Systems Software · contribution
+3.862 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2020 · 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 | $1294.8bn | 6.387% | +0.687 pp | +3.745 pp | +65.4% | Yes |
| ServiceNow → NOW | United States | $12.8bn | 0.063% | +0.063 pp | +0.063 pp | +53.7% | Yes |
| Gen Digital → GEN | United States | $17.7bn | 0.087% | +0.014 pp | +0.043 pp | +37.3% | Yes |
| Fortinet → FTNT | United States | $3.9bn | 0.019% | +0.005 pp | +0.011 pp | +50.7% | 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.