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 & Peripherals9.50%+7.43 ppSystems Software6.96%+0.91 ppApplication Software3.63%+0.57 ppCommunications Equipment0.93%-0.25 ppSemiconductor Materials & Equipment0.44%+0.13 ppIT Consulting & Other Services1.34%-0.11 ppElectronic Equipment & Instruments0.42%+0.08 ppSemiconductors3.42%+0.06 ppTechnology Distributors0.08%-0.02 ppInternet Services & Infrastructure0.17%-0.01 ppElectronic Manufacturing Services0.16%+0.00 ppElectronic Components0.13%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.96%
Industry change · 12M
+0.91 pp
Systems Software · contribution
+0.912 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $1681.6bn | 6.806% | +6.798 pp | +0.904 pp | +42.5% | Yes |
| ServiceNow → NOW | United States | $21.5bn | 0.087% | +0.087 pp | +0.035 pp | +95.0% | Yes |
| Gen Digital → GEN | United States | $12.3bn | 0.050% | +0.050 pp | -0.028 pp | +44.4% | Yes |
| Fortinet → FTNT | United States | $4.8bn | 0.020% | +0.019 pp | +0.002 pp | +39.1% | 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.