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 Software8.22%+1.14 ppApplication Software3.70%+0.88 ppSemiconductors3.59%+0.52 ppTechnology Hardware, Storage & Peripherals9.23%+0.22 ppSemiconductor Materials & Equipment0.49%+0.13 ppCommunications Equipment0.96%+0.10 ppElectronic Equipment & Instruments0.36%-0.02 ppIT Consulting & Other Services1.28%+0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.01 ppElectronic Components0.13%-0.01 ppInternet Services & Infrastructure0.12%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.22%
Industry change · 12M
+1.14 pp
Systems Software · contribution
+1.140 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $2345.9bn | 7.834% | +1.978 pp | +1.008 pp | +36.9% | Yes |
| Palo Alto Networks → PANW | United States | $36.2bn | 0.121% | +0.030 pp | +0.121 pp | +43.1% | Yes |
| ServiceNow → NOW | United States | $22.8bn | 0.076% | +0.023 pp | +0.016 pp | +48.0% | Yes |
| Gen Digital → GEN | United States | $11.3bn | 0.038% | +0.010 pp | -0.007 pp | -10.0% | Yes |
| Fortinet → FTNT | United States | $46.1bn | 0.154% | +0.017 pp | +0.002 pp | +19.4% | 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.