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 Software2.84%-1.43 ppSemiconductors1.86%-1.36 ppApplication Software1.81%-0.98 ppIT Consulting & Other Services0.95%-0.79 ppCommunications Equipment0.82%-0.50 ppTechnology Hardware, Storage & Peripherals1.23%-0.46 ppSemiconductor Materials & Equipment0.13%-0.22 ppElectronic Manufacturing Services0.10%-0.11 ppElectronic Components0.10%-0.07 ppElectronic Equipment & Instruments0.10%-0.07 ppInternet Services & Infrastructure0.10%-0.03 ppTechnology Distributors0.00%+0.00 pp
3 · Sub-industry
Inside Semiconductor Materials & Equipment
Semiconductor Materials & Equipment · weight
0.13%
Industry change · 12M
-0.22 pp
Semiconductor Materials & Equipment · contribution
-0.217 pp
Company participation
0%
of industry constituents above their 6M weight average
4 · Companies driving this sub-industry
Sep 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 | $38.0bn | 0.121% | -0.161 pp | -0.202 pp | -27.2% | No |
| Lam Research → LRCX | United States | $2.4bn | 0.008% | -0.010 pp | -0.010 pp | -19.6% | No |
| KLA Corporation → KLAC | United States | $1.6bn | 0.005% | -0.005 pp | -0.005 pp | -5.6% | 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.