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 Software4.46%-2.74 ppTechnology Hardware, Storage & Peripherals5.82%-2.61 ppApplication Software1.57%-1.73 ppSemiconductors10.39%-0.75 ppIT Consulting & Other Services0.55%-0.65 ppSemiconductor Materials & Equipment0.94%+0.37 ppCommunications Equipment0.86%-0.18 ppElectronic Components0.30%+0.11 ppElectronic Equipment & Instruments0.18%-0.11 ppInternet Services & Infrastructure0.06%-0.07 ppTechnology Distributors0.02%-0.03 ppElectronic Manufacturing Services0.13%-0.01 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.86%
Industry change · 12M
-0.18 pp
Communications Equipment · contribution
-0.176 pp
Company participation
20%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 2026 · 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 | $313.9bn | 0.431% | -0.166 pp | -0.140 pp | +27.0% | No |
| Ciena → CIEN | United States | $49.1bn | 0.067% | +0.067 pp | +0.067 pp | +338.2% | Yes |
| Motorola Solutions → MSI | United States | $79.9bn | 0.110% | -0.011 pp | -0.055 pp | +10.7% | No |
| Arista Networks → ANET | United States | $167.7bn | 0.230% | -0.093 pp | -0.032 pp | +43.5% | No |
| F5, Inc. → FFIV | United States | $15.3bn | 0.021% | -0.006 pp | -0.017 pp | -7.2% | 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.