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
Semiconductors12.18%+8.17 ppSystems Software7.54%-1.19 ppTechnology Hardware, Storage & Peripherals8.85%-0.38 ppApplication Software3.51%-0.29 ppIT Consulting & Other Services1.14%-0.19 ppElectronic Equipment & Instruments0.28%-0.08 ppSemiconductor Materials & Equipment0.58%+0.07 ppElectronic Components0.19%+0.07 ppElectronic Manufacturing Services0.13%-0.05 ppTechnology Distributors0.05%-0.04 ppCommunications Equipment0.82%-0.03 ppInternet Services & Infrastructure0.14%+0.02 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.54%
Industry change · 12M
-1.19 pp
Systems Software · contribution
-1.194 pp
Company participation
80%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2024 · 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 | $3133.8bn | 7.106% | -0.339 pp | -1.228 pp | +12.9% | Yes |
| Fortinet → FTNT | United States | $72.4bn | 0.164% | +0.026 pp | +0.030 pp | +61.4% | Yes |
| ServiceNow → NOW | United States | $43.7bn | 0.099% | +0.013 pp | +0.013 pp | +50.1% | Yes |
| Gen Digital → GEN | United States | $16.9bn | 0.038% | -0.001 pp | -0.005 pp | +22.4% | No |
| Palo Alto Networks → PANW | United States | $59.7bn | 0.135% | +0.006 pp | -0.003 pp | +23.4% | 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.