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 Software7.98%+0.32 ppTechnology Hardware, Storage & Peripherals9.34%-0.26 ppApplication Software3.27%+0.20 ppIT Consulting & Other Services1.17%-0.19 ppSemiconductors3.32%-0.07 ppElectronic Equipment & Instruments0.37%-0.05 ppCommunications Equipment0.89%-0.05 ppSemiconductor Materials & Equipment0.41%-0.04 ppElectronic Manufacturing Services0.13%-0.02 ppInternet Services & Infrastructure0.12%-0.01 ppElectronic Components0.13%-0.01 ppTechnology Distributors0.08%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.98%
Industry change · 12M
+0.32 pp
Systems Software · contribution
+0.324 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Apr 2023 · 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 | $2284.6bn | 7.716% | +1.403 pp | +0.211 pp | +11.8% | Yes |
| Fortinet → FTNT | United States | $49.4bn | 0.167% | +0.027 pp | +0.133 pp | +9.1% | Yes |
| Gen Digital → GEN | United States | $11.3bn | 0.038% | -0.013 pp | -0.015 pp | -27.9% | No |
| ServiceNow → NOW | United States | $18.7bn | 0.063% | -0.000 pp | -0.006 pp | -3.9% | 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.