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
Technology Hardware, Storage & Peripherals9.98%+4.46 ppSystems Software8.00%+3.72 ppSemiconductors3.71%+1.62 ppApplication Software3.54%+1.45 ppIT Consulting & Other Services1.39%+0.65 ppCommunications Equipment0.97%+0.42 ppSemiconductor Materials & Equipment0.52%+0.24 ppElectronic Equipment & Instruments0.42%+0.17 ppElectronic Components0.16%+0.08 ppElectronic Manufacturing Services0.16%+0.06 ppInternet Services & Infrastructure0.14%+0.05 ppTechnology Distributors0.09%+0.04 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.00%
Industry change · 12M
+3.72 pp
Systems Software · contribution
+3.721 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2022 · 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 | $2331.4bn | 7.841% | -0.475 pp | +3.651 pp | +35.2% | No |
| ServiceNow → NOW | United States | $23.3bn | 0.078% | -0.014 pp | +0.028 pp | +7.8% | No |
| Fortinet → FTNT | United States | $9.7bn | 0.033% | -0.004 pp | +0.021 pp | +105.3% | No |
| Gen Digital → GEN | United States | $15.1bn | 0.051% | +0.001 pp | +0.021 pp | +26.0% | 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.