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 & Peripherals7.09%-1.98 ppSystems Software6.25%-1.23 ppSemiconductors2.67%-1.07 ppIT Consulting & Other Services0.92%-0.44 ppApplication Software2.61%-0.43 ppCommunications Equipment0.67%-0.20 ppElectronic Equipment & Instruments0.27%-0.13 ppSemiconductor Materials & Equipment0.35%-0.13 ppElectronic Manufacturing Services0.10%-0.05 ppElectronic Components0.09%-0.05 ppInternet Services & Infrastructure0.09%-0.04 ppTechnology Distributors0.06%-0.03 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
6.25%
Industry change · 12M
-1.23 pp
Systems Software · contribution
-1.228 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $2441.7bn | 6.032% | -0.495 pp | -1.291 pp | +22.0% | No |
| Fortinet → FTNT | United States | $53.7bn | 0.133% | -0.031 pp | +0.099 pp | +16.2% | No |
| Gen Digital → GEN | United States | $11.2bn | 0.028% | -0.016 pp | -0.023 pp | -25.8% | No |
| ServiceNow → NOW | United States | $22.2bn | 0.055% | -0.007 pp | -0.013 pp | +16.5% | 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.