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 & Peripherals7.86%+7.86 ppSystems Software6.89%+6.88 ppApplication Software3.57%+3.56 ppSemiconductors3.45%+3.45 ppIT Consulting & Other Services1.29%+1.29 ppCommunications Equipment0.97%+0.97 ppSemiconductor Materials & Equipment0.58%+0.58 ppElectronic Equipment & Instruments0.41%+0.41 ppElectronic Components0.17%+0.17 ppElectronic Manufacturing Services0.16%+0.16 ppInternet Services & Infrastructure0.16%+0.16 ppTechnology Distributors0.08%+0.08 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.89%
Industry change · 12M
+6.88 pp
Systems Software · contribution
+6.879 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 2021 · 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 | $1880.5bn | 6.737% | +3.234 pp | +6.729 pp | +37.6% | Yes |
| ServiceNow → NOW | United States | $18.7bn | 0.067% | +0.025 pp | +0.067 pp | +22.2% | Yes |
| Gen Digital → GEN | United States | $16.0bn | 0.057% | +0.035 pp | +0.057 pp | +24.4% | Yes |
| Fortinet → FTNT | United States | $7.1bn | 0.026% | +0.015 pp | +0.026 pp | +57.0% | 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.