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 Software2.70%-1.57 ppSemiconductors1.69%-1.54 ppApplication Software1.76%-1.03 ppIT Consulting & Other Services0.88%-0.86 ppTechnology Hardware, Storage & Peripherals0.96%-0.73 ppCommunications Equipment0.80%-0.52 ppSemiconductor Materials & Equipment0.14%-0.21 ppElectronic Manufacturing Services0.09%-0.11 ppElectronic Components0.10%-0.08 ppInternet Services & Infrastructure0.10%-0.03 ppElectronic Equipment & Instruments0.14%-0.02 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
2.70%
Industry change · 12M
-1.57 pp
Systems Software · contribution
-1.574 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2019 · 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 | $801.2bn | 2.642% | -0.137 pp | -1.530 pp | +11.8% | No |
| Gen Digital → GEN | United States | $13.4bn | 0.044% | +0.005 pp | -0.052 pp | -21.8% | Yes |
| Fortinet → FTNT | United States | $2.6bn | 0.009% | -0.001 pp | +0.009 pp | +66.3% | 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.