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 Software8.74%+2.04 ppTechnology Hardware, Storage & Peripherals9.23%+1.49 ppSemiconductors4.01%+0.98 ppApplication Software3.81%+0.95 ppSemiconductor Materials & Equipment0.51%+0.12 ppCommunications Equipment0.85%-0.07 ppIT Consulting & Other Services1.33%+0.05 ppElectronic Manufacturing Services0.18%+0.05 ppElectronic Equipment & Instruments0.36%-0.03 ppElectronic Components0.12%-0.02 ppInternet Services & Infrastructure0.12%-0.01 ppTechnology Distributors0.09%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.74%
Industry change · 12M
+2.04 pp
Systems Software · contribution
+2.041 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 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 | $2794.8bn | 8.335% | +0.500 pp | +1.883 pp | +58.2% | Yes |
| Palo Alto Networks → PANW | United States | $46.5bn | 0.139% | +0.018 pp | +0.139 pp | +111.3% | Yes |
| ServiceNow → NOW | United States | $29.0bn | 0.086% | +0.010 pp | +0.030 pp | +82.0% | Yes |
| Gen Digital → GEN | United States | $14.6bn | 0.044% | +0.006 pp | -0.007 pp | +9.3% | Yes |
| Fortinet → FTNT | United States | $44.9bn | 0.134% | -0.020 pp | -0.004 pp | +19.7% | 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.