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
Systems Software6.05%+3.21 ppSemiconductors3.36%+1.60 ppApplication Software3.06%+1.33 ppTechnology Hardware, Storage & Peripherals2.06%+1.09 ppIT Consulting & Other Services1.45%+0.60 ppCommunications Equipment1.18%+0.38 ppElectronic Equipment & Instruments0.34%+0.20 ppSemiconductor Materials & Equipment0.31%+0.18 ppTechnology Distributors0.10%+0.10 ppInternet Services & Infrastructure0.18%+0.08 ppElectronic Manufacturing Services0.16%+0.06 ppElectronic Components0.13%+0.03 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.31%
Industry change · 12M
+0.18 pp
Semiconductor Materials & Equipment · contribution
+0.184 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Dec 2019 · 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 | $55.9bn | 0.274% | +0.029 pp | +0.162 pp | +89.9% | Yes |
| Lam Research → LRCX | United States | $4.2bn | 0.021% | +0.003 pp | +0.013 pp | +119.3% | Yes |
| KLA Corporation → KLAC | United States | $2.8bn | 0.014% | +0.000 pp | +0.009 pp | +104.0% | 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.