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
Semiconductors11.59%+8.00 ppTechnology Hardware, Storage & Peripherals8.55%-0.69 ppSystems Software7.84%-0.38 ppApplication Software3.39%-0.31 ppCommunications Equipment0.77%-0.19 ppIT Consulting & Other Services1.18%-0.11 ppElectronic Equipment & Instruments0.30%-0.06 ppElectronic Components0.18%+0.05 ppTechnology Distributors0.07%-0.02 ppElectronic Manufacturing Services0.14%+0.01 ppInternet Services & Infrastructure0.13%+0.01 ppSemiconductor Materials & Equipment0.49%+0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.84%
Industry change · 12M
-0.38 pp
Systems Software · contribution
-0.385 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2024 · 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 | $3198.4bn | 7.446% | +1.219 pp | -0.389 pp | +37.3% | Yes |
| Fortinet → FTNT | United States | $59.3bn | 0.138% | +0.052 pp | -0.016 pp | +32.2% | Yes |
| ServiceNow → NOW | United States | $36.8bn | 0.086% | +0.025 pp | +0.010 pp | +60.0% | Yes |
| Palo Alto Networks → PANW | United States | $55.6bn | 0.130% | +0.027 pp | +0.009 pp | +45.8% | Yes |
| Gen Digital → GEN | United States | $16.9bn | 0.039% | +0.010 pp | +0.002 pp | +58.6% | 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.