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
Universe›Information Technology›Semiconductor Materials & Equipment›Semiconductor Materials & Equipment
1 · Sector
Weight and 12M allocation change
2 · Industry
Inside Information Technology
Semiconductors3.65%+0.43 ppSystems Software4.69%+0.42 ppTechnology Hardware, Storage & Peripherals2.08%+0.39 ppApplication Software3.12%+0.33 ppCommunications Equipment1.39%+0.07 ppIT Consulting & Other Services1.70%-0.05 ppInternet Services & Infrastructure0.15%+0.03 ppElectronic Components0.16%-0.02 ppSemiconductor Materials & Equipment0.34%-0.01 ppElectronic Equipment & Instruments0.17%+0.01 ppElectronic Manufacturing Services0.20%-0.01 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.34%
Industry change · 12M
-0.01 pp
Semiconductor Materials & Equipment · contribution
-0.010 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
May 2018 · 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 |
|---|---|---|---|---|---|---|---|
| Applied Materials → AMAT | United States | $51.2bn | 0.311% | -0.052 pp | -0.013 pp | -4.8% | No |
| Lam Research → LRCX | United States | $3.3bn | 0.020% | +0.001 pp | +0.002 pp | +3.7% | Yes |
| KLA Corporation → KLAC | United States | $1.8bn | 0.011% | +0.000 pp | +0.001 pp | +4.4% | 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.