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

Information Technology28.3%+2.98 ppConsumer Discretionary12.3%+1.34 ppIndustrials9.9%+0.26 ppEnergy3.7%+0.18 ppMaterials2.9%-0.09 ppCommunication Services2.9%-0.40 ppReal Estate2.8%-0.49 ppUtilities2.8%-0.68 ppConsumer Staples7.1%-0.72 ppFinancials11.1%-0.86 ppHealth Care16.2%-1.52 pp

2 · Industry

Inside Information Technology

Systems Software8.22%+1.14 ppApplication Software3.70%+0.88 ppSemiconductors3.59%+0.52 ppTechnology Hardware, Storage & Peripherals9.23%+0.22 ppSemiconductor Materials & Equipment0.49%+0.13 ppCommunications Equipment0.96%+0.10 ppElectronic Equipment & Instruments0.36%-0.02 ppIT Consulting & Other Services1.28%+0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.01 ppElectronic Components0.13%-0.01 ppInternet Services & Infrastructure0.12%+0.00 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.49%+0.127 pp
Concentrated

Most of this industry's gains came from a few companies.

View all contributions →
Semiconductor Materials & Equipment · weight
0.49%
Industry change · 12M
+0.13 pp
Semiconductor Materials & Equipment · contribution
+0.127 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Sep 2023 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$115.8bn0.387%+0.106 pp+0.110 pp+70.6%Yes
Lam Research →
LRCX
United States$8.3bn0.028%+0.008 pp+0.008 pp+73.5%Yes
Teradyne →
TER
United States$15.5bn0.052%+0.012 pp+0.005 pp+34.3%Yes
KLA Corporation →
KLAC
United States$6.3bn0.021%+0.006 pp+0.004 pp+53.5%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.