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
Semiconductors12.14%+8.70 ppSystems Software7.51%-1.43 ppTechnology Hardware, Storage & Peripherals8.36%-1.00 ppApplication Software3.41%-0.34 ppSemiconductor Materials & Equipment0.64%+0.17 ppCommunications Equipment0.79%-0.17 ppIT Consulting & Other Services1.14%-0.15 ppElectronic Components0.19%+0.07 ppElectronic Equipment & Instruments0.29%-0.06 ppTechnology Distributors0.06%-0.03 ppElectronic Manufacturing Services0.14%+0.01 ppInternet Services & Infrastructure0.13%+0.01 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.79%
Industry change · 12M
-0.17 pp
Communications Equipment · contribution
-0.167 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Oct 2024 · 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 | $218.6bn | 0.514% | +0.164 pp | -0.205 pp | +8.5% | Yes |
| Arista Networks → ANET | United States | $30.4bn | 0.071% | +0.023 pp | +0.018 pp | +92.9% | Yes |
| Motorola Solutions → MSI | United States | $75.0bn | 0.176% | +0.057 pp | +0.018 pp | +63.1% | Yes |
| F5, Inc. → FFIV | United States | $13.6bn | 0.032% | +0.011 pp | +0.001 pp | +54.3% | 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.