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 & Peripherals8.50%-1.23 ppSystems Software6.80%-1.15 ppSemiconductors3.32%-0.48 ppApplication Software3.00%-0.30 ppIT Consulting & Other Services1.21%-0.11 ppCommunications Equipment0.92%-0.09 ppSemiconductor Materials & Equipment0.44%-0.08 ppInternet Services & Infrastructure0.11%-0.03 ppElectronic Equipment & Instruments0.39%-0.02 ppElectronic Manufacturing Services0.14%-0.02 ppElectronic Components0.14%-0.02 ppTechnology Distributors0.10%+0.02 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.80%
Industry change · 12M
-1.15 pp
Systems Software · contribution
-1.151 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2023 · 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 | $1856.6bn | 6.527% | +0.072 pp | -1.243 pp | -15.7% | Yes |
| Fortinet → FTNT | United States | $46.6bn | 0.164% | +0.023 pp | +0.125 pp | -13.7% | Yes |
| ServiceNow → NOW | United States | $17.5bn | 0.062% | +0.004 pp | -0.019 pp | -25.5% | Yes |
| Gen Digital → GEN | United States | $12.5bn | 0.044% | -0.007 pp | -0.015 pp | -31.2% | No |
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.