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
Technology Hardware, Storage & Peripherals4.28%+4.27 ppSystems Software3.58%+3.57 ppSemiconductors1.83%+1.83 ppApplication Software1.78%+1.78 ppIT Consulting & Other Services0.63%+0.63 ppCommunications Equipment0.46%+0.46 ppSemiconductor Materials & Equipment0.29%+0.29 ppElectronic Equipment & Instruments0.21%+0.21 ppElectronic Manufacturing Services0.09%+0.09 ppInternet Services & Infrastructure0.07%+0.07 ppElectronic Components0.07%+0.07 ppTechnology Distributors0.04%+0.04 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
3.58%
Industry change · 12M
+3.57 pp
Systems Software · contribution
+3.573 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2021 · 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 | $1752.7bn | 3.503% | -3.371 pp | +3.498 pp | +44.9% | No |
| ServiceNow → NOW | United States | $20.9bn | 0.042% | -0.047 pp | +0.042 pp | +63.6% | No |
| Gen Digital → GEN | United States | $11.4bn | 0.023% | -0.023 pp | +0.023 pp | +5.0% | No |
| Fortinet → FTNT | United States | $5.5bn | 0.011% | -0.006 pp | +0.011 pp | +65.4% | 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.