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 Technology40.9%+4.04 ppEnergy3.9%+1.55 ppHealth Care10.6%+0.01 ppCommunication Services2.3%-0.19 ppMaterials2.0%-0.23 ppReal Estate1.9%-0.31 ppIndustrials9.3%-0.48 ppUtilities2.2%-0.48 ppConsumer Staples5.5%-0.92 ppConsumer Discretionary10.8%-1.27 ppFinancials10.5%-1.72 pp

2 · Industry

Inside Information Technology

Semiconductors17.29%+3.19 ppTechnology Hardware, Storage & Peripherals8.93%+1.44 ppApplication Software2.00%-1.38 ppSemiconductor Materials & Equipment1.75%+1.16 ppSystems Software7.68%-0.69 ppCommunications Equipment1.54%+0.41 ppIT Consulting & Other Services0.64%-0.29 ppElectronic Components0.47%+0.21 ppElectronic Manufacturing Services0.22%+0.05 ppInternet Services & Infrastructure0.09%-0.03 ppElectronic Equipment & Instruments0.24%-0.02 ppTechnology Distributors0.03%-0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment1.75%+1.157 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
1.75%
Industry change · 12M
+1.16 pp
Semiconductor Materials & Equipment · contribution
+1.157 pp
Company participation
40%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2026 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$377.3bn0.628%-0.061 pp+0.366 pp+202.7%Yes
KLA Corporation →
KLAC
United States$229.2bn0.382%+0.338 pp+0.358 pp+102.3%Yes
Applied Materials →
AMAT
United States$363.8bn0.606%-0.013 pp+0.340 pp+186.7%No
Teradyne →
TER
United States$54.7bn0.091%-0.010 pp+0.052 pp+196.6%No
Qnity Electronics →
Q
United States$25.0bn0.042%-0.015 pp+0.042 pp+0.0%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.