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 Software4.83%+0.56 ppTechnology Hardware, Storage & Peripherals2.02%+0.32 ppApplication Software3.01%+0.23 ppSemiconductors3.39%+0.17 ppIT Consulting & Other Services1.68%-0.06 ppInternet Services & Infrastructure0.18%+0.05 ppSemiconductor Materials & Equipment0.31%-0.04 ppCommunications Equipment1.34%+0.02 ppElectronic Equipment & Instruments0.18%+0.02 ppElectronic Manufacturing Services0.19%-0.02 ppElectronic Components0.18%+0.00 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
4.83%
Industry change · 12M
+0.56 pp
Systems Software · contribution
+0.558 pp
Company participation
50%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jul 2018 · 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 | $815.0bn | 4.754% | +0.339 pp | +0.581 pp | +12.7% | Yes |
| Gen Digital → GEN | United States | $12.6bn | 0.073% | -0.033 pp | -0.023 pp | -25.3% | 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.