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
Application Software3.00%-1.02 ppTechnology Hardware, Storage & Peripherals9.35%+0.59 ppSystems Software7.23%-0.53 ppSemiconductors3.26%-0.24 ppSemiconductor Materials & Equipment0.38%-0.15 ppCommunications Equipment0.87%-0.14 ppElectronic Equipment & Instruments0.38%-0.08 ppIT Consulting & Other Services1.27%-0.07 ppInternet Services & Infrastructure0.12%-0.02 ppElectronic Manufacturing Services0.14%-0.02 ppTechnology Distributors0.08%-0.01 ppElectronic Components0.14%-0.01 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.23%
Industry change · 12M
-0.53 pp
Systems Software · contribution
-0.532 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $1950.0bn | 6.979% | -0.344 pp | -0.607 pp | -12.7% | No |
| Fortinet → FTNT | United States | $38.4bn | 0.137% | +0.103 pp | +0.103 pp | -22.7% | Yes |
| ServiceNow → NOW | United States | $17.5bn | 0.063% | -0.005 pp | -0.023 pp | -32.5% | No |
| Gen Digital → GEN | United States | $12.9bn | 0.046% | -0.005 pp | -0.005 pp | -13.2% | 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.