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 Software6.56%+3.86 ppSemiconductors3.36%+1.68 ppApplication Software3.25%+1.49 ppTechnology Hardware, Storage & Peripherals2.12%+1.16 ppIT Consulting & Other Services1.48%+0.60 ppCommunications Equipment1.15%+0.35 ppElectronic Equipment & Instruments0.35%+0.20 ppSemiconductor Materials & Equipment0.30%+0.16 ppInternet Services & Infrastructure0.19%+0.09 ppTechnology Distributors0.09%+0.09 ppElectronic Manufacturing Services0.15%+0.06 ppElectronic Components0.12%+0.02 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.30%
Industry change · 12M
+0.16 pp
Semiconductor Materials & Equipment · contribution
+0.159 pp
Company participation
67%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Jan 2020 · 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 | $53.1bn | 0.262% | +0.001 pp | +0.138 pp | +51.1% | Yes |
| Lam Research → LRCX | United States | $4.3bn | 0.021% | +0.001 pp | +0.013 pp | +79.6% | Yes |
| KLA Corporation → KLAC | United States | $2.6bn | 0.013% | -0.001 pp | +0.008 pp | +59.3% | 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.