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 & Peripherals8.94%+6.99 ppSystems Software7.03%+1.06 ppApplication Software3.67%+0.52 ppCommunications Equipment0.94%-0.22 ppSemiconductors3.45%+0.22 ppElectronic Equipment & Instruments0.43%+0.14 ppSemiconductor Materials & Equipment0.44%+0.14 ppIT Consulting & Other Services1.36%-0.11 ppTechnology Distributors0.08%-0.02 ppInternet Services & Infrastructure0.17%-0.01 ppElectronic Components0.14%+0.01 ppElectronic Manufacturing Services0.16%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.03%
Industry change · 12M
+1.06 pp
Systems Software · contribution
+1.057 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $1618.5bn | 6.874% | +6.865 pp | +1.056 pp | +42.9% | Yes |
| ServiceNow → NOW | United States | $20.9bn | 0.089% | +0.088 pp | +0.035 pp | +88.9% | Yes |
| Gen Digital → GEN | United States | $10.8bn | 0.046% | +0.046 pp | -0.032 pp | +29.8% | Yes |
| Fortinet → FTNT | United States | $4.0bn | 0.017% | +0.017 pp | -0.001 pp | +17.2% | 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.