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 Software8.15%+0.92 ppApplication Software3.83%+0.83 ppSemiconductors3.59%+0.33 ppTechnology Hardware, Storage & Peripherals9.66%+0.30 ppSemiconductor Materials & Equipment0.51%+0.14 ppCommunications Equipment0.97%+0.10 ppElectronic Equipment & Instruments0.35%-0.02 ppIT Consulting & Other Services1.29%+0.02 ppElectronic Manufacturing Services0.13%-0.01 ppElectronic Components0.13%-0.01 ppTechnology Distributors0.09%+0.01 ppInternet Services & Infrastructure0.12%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
8.15%
Industry change · 12M
+0.92 pp
Systems Software · contribution
+0.922 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Aug 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 | $2435.2bn | 7.760% | +1.729 pp | +0.782 pp | +26.6% | Yes |
| Palo Alto Networks → PANW | United States | $37.2bn | 0.119% | +0.119 pp | +0.119 pp | +31.1% | Yes |
| ServiceNow → NOW | United States | $24.1bn | 0.077% | +0.022 pp | +0.014 pp | +35.5% | Yes |
| Fortinet → FTNT | United States | $47.3bn | 0.151% | +0.018 pp | +0.013 pp | +23.7% | Yes |
| Gen Digital → GEN | United States | $12.9bn | 0.041% | +0.014 pp | -0.005 pp | -8.1% | 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.