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 & Peripherals9.08%+7.18 ppSystems Software7.41%+1.62 ppApplication Software3.82%+0.75 ppCommunications Equipment0.89%-0.36 ppElectronic Equipment & Instruments0.40%+0.12 ppIT Consulting & Other Services1.34%-0.12 ppSemiconductor Materials & Equipment0.36%+0.07 ppSemiconductors3.33%+0.07 ppInternet Services & Infrastructure0.18%-0.01 ppTechnology Distributors0.08%-0.01 ppElectronic Manufacturing Services0.15%-0.01 ppElectronic Components0.14%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.41%
Industry change · 12M
+1.62 pp
Systems Software · contribution
+1.625 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $1530.8bn | 7.247% | +7.240 pp | +1.547 pp | +42.8% | Yes |
| ServiceNow → NOW | United States | $19.4bn | 0.092% | +0.092 pp | +0.092 pp | +101.2% | Yes |
| Gen Digital → GEN | United States | $12.2bn | 0.058% | +0.057 pp | -0.016 pp | +59.1% | Yes |
| Fortinet → FTNT | United States | $3.6bn | 0.017% | +0.017 pp | +0.002 pp | +35.3% | 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.