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 Software8.94%+2.53 ppApplication Software3.75%+0.86 ppSemiconductors3.44%+0.58 ppTechnology Hardware, Storage & Peripherals9.37%+0.43 ppSemiconductor Materials & Equipment0.47%+0.12 ppCommunications Equipment0.96%+0.09 ppElectronic Equipment & Instruments0.35%-0.04 ppElectronic Components0.12%-0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.01 ppIT Consulting & Other Services1.29%+0.01 ppInternet Services & Infrastructure0.12%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.94%
Industry change · 12M
+2.53 pp
Systems Software · contribution
+2.534 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 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 | $2512.9bn | 8.543% | +3.103 pp | +2.403 pp | +47.1% | Yes |
| Palo Alto Networks → PANW | United States | $37.5bn | 0.127% | +0.044 pp | +0.127 pp | +41.6% | Yes |
| ServiceNow → NOW | United States | $23.9bn | 0.081% | +0.029 pp | +0.021 pp | +38.3% | Yes |
| Gen Digital → GEN | United States | $10.7bn | 0.036% | +0.009 pp | -0.009 pp | -24.2% | Yes |
| Fortinet → FTNT | United States | $44.9bn | 0.153% | +0.020 pp | -0.007 pp | +0.0% | 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.