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 Technology29.0%+4.54 ppConsumer Discretionary12.1%+0.51 ppIndustrials9.9%+0.06 ppMaterials2.9%-0.07 ppReal Estate2.8%-0.34 ppCommunication Services2.9%-0.37 ppUtilities2.9%-0.44 ppEnergy3.6%-0.51 ppConsumer Staples7.1%-0.55 ppFinancials11.0%-1.14 ppHealth Care15.8%-1.70 pp

2 · Industry

Inside Information Technology

Systems Software8.94%+2.53 ppApplication Software3.75%+0.86 ppSemiconductors3.44%+0.58 ppTechnology Hardware, Storage & Peripherals9.37%+0.43 ppSemiconductor Materials & Equipment0.47%+0.12 ppCommunications Equipment0.96%+0.09 ppElectronic Equipment & Instruments0.35%-0.04 ppElectronic Components0.12%-0.02 ppElectronic Manufacturing Services0.13%-0.01 ppTechnology Distributors0.09%+0.01 ppIT Consulting & Other Services1.29%+0.01 ppInternet Services & Infrastructure0.12%-0.00 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.47%+0.118 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.47%
Industry change · 12M
+0.12 pp
Semiconductor Materials & Equipment · contribution
+0.118 pp
Company participation
75%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$110.7bn0.376%+0.099 pp+0.107 pp+51.3%Yes
Lam Research →
LRCX
United States$7.8bn0.026%+0.005 pp+0.007 pp+47.2%Yes
KLA Corporation →
KLAC
United States$6.4bn0.022%+0.006 pp+0.006 pp+50.3%Yes
Teradyne →
TER
United States$12.8bn0.044%+0.005 pp-0.002 pp+2.8%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.