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 Software9.18%+2.48 ppTechnology Hardware, Storage & Peripherals9.52%+1.23 ppApplication Software3.99%+1.12 ppSemiconductors3.68%+0.55 ppSemiconductor Materials & Equipment0.49%+0.08 ppCommunications Equipment0.87%-0.05 ppElectronic Equipment & Instruments0.35%-0.03 ppElectronic Components0.12%-0.02 ppIT Consulting & Other Services1.33%+0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.00 ppInternet Services & Infrastructure0.12%-0.00 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.87%
Industry change · 12M
-0.05 pp
Communications Equipment · contribution
-0.050 pp
Company participation
75%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Nov 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 |
|---|---|---|---|---|---|---|---|
| Cisco → CSCO | United States | $196.6bn | 0.613% | -0.132 pp | -0.080 pp | +0.3% | No |
| Arista Networks → ANET | United States | $17.1bn | 0.053% | +0.005 pp | +0.017 pp | +57.7% | Yes |
| Motorola Solutions → MSI | United States | $53.6bn | 0.167% | +0.016 pp | +0.013 pp | +20.2% | Yes |
| F5, Inc. → FFIV | United States | $10.2bn | 0.032% | +0.001 pp | +0.000 pp | +10.7% | 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.