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 & Peripherals7.09%-1.98 ppSystems Software6.25%-1.23 ppSemiconductors2.67%-1.07 ppIT Consulting & Other Services0.92%-0.44 ppApplication Software2.61%-0.43 ppCommunications Equipment0.67%-0.20 ppElectronic Equipment & Instruments0.27%-0.13 ppSemiconductor Materials & Equipment0.35%-0.13 ppElectronic Manufacturing Services0.10%-0.05 ppElectronic Components0.09%-0.05 ppInternet Services & Infrastructure0.09%-0.04 ppTechnology Distributors0.06%-0.03 pp
3 · Sub-industry
Inside Communications Equipment
Communications Equipment · weight
0.67%
Industry change · 12M
-0.20 pp
Communications Equipment · contribution
-0.198 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 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 | $202.4bn | 0.500% | -0.197 pp | -0.172 pp | +14.0% | No |
| Motorola Solutions → MSI | United States | $47.3bn | 0.117% | -0.038 pp | -0.016 pp | +30.1% | No |
| F5, Inc. → FFIV | United States | $8.9bn | 0.022% | -0.008 pp | -0.013 pp | -9.5% | No |
| Arista Networks → ANET | United States | $12.8bn | 0.032% | -0.006 pp | +0.003 pp | +62.6% | 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.