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
Application Software2.82%-1.14 ppSystems Software7.08%-0.53 ppTechnology Hardware, Storage & Peripherals9.01%+0.44 ppSemiconductors3.07%-0.44 ppSemiconductor Materials & Equipment0.36%-0.16 ppCommunications Equipment0.86%-0.13 ppIT Consulting & Other Services1.27%-0.09 ppElectronic Equipment & Instruments0.38%-0.06 ppElectronic Manufacturing Services0.14%-0.02 ppInternet Services & Infrastructure0.12%-0.02 ppElectronic Components0.14%-0.01 ppTechnology Distributors0.08%-0.00 pp
3 · Sub-industry
Inside Systems Software
Systems Software · weight
7.08%
Industry change · 12M
-0.53 pp
Systems Software · contribution
-0.527 pp
Company participation
25%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 2022 · 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 | $1736.9bn | 6.826% | -0.644 pp | -0.612 pp | -16.7% | No |
| Fortinet → FTNT | United States | $38.7bn | 0.152% | +0.117 pp | +0.119 pp | -15.9% | Yes |
| ServiceNow → NOW | United States | $15.2bn | 0.060% | -0.014 pp | -0.027 pp | -39.3% | No |
| Gen Digital → GEN | United States | $11.5bn | 0.045% | -0.004 pp | -0.006 pp | -18.8% | 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.