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 Software5.08%+0.66 ppApplication Software3.31%+0.38 ppSemiconductors3.18%-0.22 ppIT Consulting & Other Services1.59%-0.20 ppSemiconductor Materials & Equipment0.24%-0.16 ppTechnology Hardware, Storage & Peripherals1.73%-0.13 ppElectronic Equipment & Instruments0.29%+0.12 ppCommunications Equipment1.52%+0.07 ppElectronic Manufacturing Services0.16%-0.06 ppInternet Services & Infrastructure0.19%+0.05 ppElectronic Components0.18%+0.01 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.24%
Industry change · 12M
-0.16 pp
Semiconductor Materials & Equipment · contribution
-0.155 pp
Company participation
100%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Feb 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 | $36.4bn | 0.211% | +0.089 pp | -0.152 pp | -32.1% | Yes |
| Lam Research → LRCX | United States | $2.7bn | 0.016% | +0.007 pp | -0.003 pp | -6.2% | Yes |
| KLA Corporation → KLAC | United States | $1.7bn | 0.010% | +0.005 pp | -0.001 pp | +4.9% | 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.