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 & Peripherals9.73%+5.45 ppSystems Software7.95%+4.37 ppSemiconductors3.80%+1.96 ppApplication Software3.30%+1.52 ppIT Consulting & Other Services1.32%+0.69 ppCommunications Equipment1.01%+0.54 ppSemiconductor Materials & Equipment0.52%+0.24 ppElectronic Equipment & Instruments0.41%+0.20 ppElectronic Components0.16%+0.09 ppElectronic Manufacturing Services0.16%+0.07 ppInternet Services & Infrastructure0.14%+0.07 ppTechnology Distributors0.08%+0.04 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.95%
Industry change · 12M
+4.37 pp
Systems Software · contribution
+4.369 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 | $2240.0bn | 7.770% | -0.615 pp | +4.267 pp | +29.6% | No |
| ServiceNow → NOW | United States | $23.2bn | 0.080% | -0.007 pp | +0.039 pp | +8.7% | No |
| Gen Digital → GEN | United States | $16.9bn | 0.058% | +0.010 pp | +0.036 pp | +51.4% | Yes |
| Fortinet → FTNT | United States | $11.1bn | 0.038% | +0.002 pp | +0.027 pp | +104.0% | 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.