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
Systems Software6.70%-1.85 ppApplication Software2.87%-1.33 ppTechnology Hardware, Storage & Peripherals8.28%-1.27 ppSemiconductors3.14%-0.89 ppSemiconductor Materials & Equipment0.41%-0.18 ppElectronic Equipment & Instruments0.38%-0.08 ppCommunications Equipment0.92%-0.07 ppIT Consulting & Other Services1.31%-0.04 ppElectronic Manufacturing Services0.14%-0.03 ppInternet Services & Infrastructure0.12%-0.03 ppElectronic Components0.14%-0.01 ppTechnology Distributors0.09%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.70%
Industry change · 12M
-1.85 pp
Systems Software · contribution
-1.855 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 2022 · 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 | $1901.9bn | 6.455% | -0.524 pp | -1.931 pp | -22.1% | No |
| Fortinet → FTNT | United States | $41.5bn | 0.141% | +0.004 pp | +0.104 pp | -20.0% | Yes |
| ServiceNow → NOW | United States | $16.9bn | 0.057% | -0.006 pp | -0.030 pp | -35.7% | No |
| Gen Digital → GEN | United States | $15.0bn | 0.051% | +0.005 pp | +0.002 pp | -5.7% | 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.