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 Software9.18%+2.48 ppTechnology Hardware, Storage & Peripherals9.52%+1.23 ppApplication Software3.99%+1.12 ppSemiconductors3.68%+0.55 ppSemiconductor Materials & Equipment0.49%+0.08 ppCommunications Equipment0.87%-0.05 ppElectronic Equipment & Instruments0.35%-0.03 ppElectronic Components0.12%-0.02 ppIT Consulting & Other Services1.33%+0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.00 ppInternet Services & Infrastructure0.12%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
9.18%
Industry change · 12M
+2.48 pp
Systems Software · contribution
+2.479 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 | $2816.2bn | 8.780% | +1.019 pp | +2.325 pp | +49.8% | Yes |
| Palo Alto Networks → PANW | United States | $46.5bn | 0.145% | +0.026 pp | +0.145 pp | +73.7% | Yes |
| ServiceNow → NOW | United States | $28.1bn | 0.088% | +0.011 pp | +0.030 pp | +64.7% | Yes |
| Fortinet → FTNT | United States | $40.4bn | 0.126% | -0.025 pp | -0.015 pp | -1.1% | No |
| Gen Digital → GEN | United States | $14.1bn | 0.044% | +0.003 pp | -0.007 pp | -1.3% | 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.