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 & Peripherals7.74%-1.98 ppSystems Software6.70%-1.56 ppSemiconductors3.02%-0.87 ppApplication Software2.86%-0.87 ppSemiconductor Materials & Equipment0.39%-0.20 ppIT Consulting & Other Services1.27%-0.19 ppCommunications Equipment0.93%-0.13 ppElectronic Equipment & Instruments0.39%-0.06 ppElectronic Manufacturing Services0.13%-0.04 ppInternet Services & Infrastructure0.13%-0.02 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
-1.56 pp
Systems Software · contribution
-1.562 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $1787.7bn | 6.451% | -0.375 pp | -1.638 pp | -28.0% | No |
| Fortinet → FTNT | United States | $38.2bn | 0.138% | -0.014 pp | +0.100 pp | -32.0% | Yes |
| ServiceNow → NOW | United States | $15.7bn | 0.057% | -0.003 pp | -0.026 pp | -40.2% | No |
| Gen Digital → GEN | United States | $14.0bn | 0.050% | +0.005 pp | +0.002 pp | -15.8% | 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.