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 Software8.26%+1.30 ppSemiconductors3.90%+0.48 ppTechnology Hardware, Storage & Peripherals9.72%+0.23 ppSemiconductor Materials & Equipment0.59%+0.14 ppCommunications Equipment1.06%+0.13 ppIT Consulting & Other Services1.47%+0.12 ppApplication Software3.73%+0.10 ppElectronic Equipment & Instruments0.45%+0.03 ppInternet Services & Infrastructure0.15%-0.02 ppTechnology Distributors0.09%+0.01 ppElectronic Components0.14%+0.01 ppElectronic Manufacturing Services0.17%+0.01 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.26%
Industry change · 12M
+1.30 pp
Systems Software · contribution
+1.295 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2021 · 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 | $2525.1bn | 8.089% | +0.651 pp | +1.283 pp | +52.5% | Yes |
| Fortinet → FTNT | United States | $11.8bn | 0.038% | +0.004 pp | +0.018 pp | +142.0% | Yes |
| ServiceNow → NOW | United States | $25.8bn | 0.083% | -0.004 pp | -0.004 pp | +17.9% | No |
| Gen Digital → GEN | United States | $15.1bn | 0.048% | -0.003 pp | -0.001 pp | +27.6% | 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.