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
Semiconductors11.08%+7.06 ppSystems Software7.30%-1.93 ppTechnology Hardware, Storage & Peripherals8.15%-0.66 ppApplication Software3.47%-0.48 ppIT Consulting & Other Services1.26%-0.15 ppSemiconductor Materials & Equipment0.62%+0.12 ppElectronic Components0.19%+0.07 ppElectronic Equipment & Instruments0.30%-0.04 ppElectronic Manufacturing Services0.14%-0.04 ppTechnology Distributors0.06%-0.03 ppInternet Services & Infrastructure0.15%+0.03 ppCommunications Equipment0.83%-0.03 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.30%
Industry change · 12M
-1.93 pp
Systems Software · contribution
-1.930 pp
Company participation
40%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2025 · 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 | $3085.6bn | 6.861% | -0.240 pp | -1.923 pp | +5.2% | No |
| Fortinet → FTNT | United States | $77.3bn | 0.172% | +0.031 pp | +0.025 pp | +56.4% | Yes |
| Palo Alto Networks → PANW | United States | $60.5bn | 0.135% | -0.003 pp | -0.024 pp | +9.0% | No |
| Gen Digital → GEN | United States | $16.6bn | 0.037% | -0.005 pp | -0.008 pp | +16.9% | No |
| ServiceNow → NOW | United States | $42.0bn | 0.093% | +0.003 pp | -0.000 pp | +33.1% | 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.