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 Technology36.8%+3.53 ppConsumer Discretionary12.0%+1.16 ppFinancials12.2%+0.79 ppCommunication Services2.5%+0.07 ppIndustrials9.8%+0.05 ppUtilities2.7%-0.09 ppEnergy2.4%-0.29 ppMaterials2.3%-0.34 ppReal Estate2.3%-0.39 ppConsumer Staples6.4%-0.84 ppHealth Care10.6%-3.65 pp

2 · Industry

Inside Information Technology

Semiconductors14.10%+4.00 ppTechnology Hardware, Storage & Peripherals7.49%-1.23 ppSystems Software8.37%+0.47 ppCommunications Equipment1.12%+0.36 ppIT Consulting & Other Services0.93%-0.23 ppSemiconductor Materials & Equipment0.59%+0.09 ppElectronic Components0.26%+0.07 ppApplication Software3.38%+0.06 ppElectronic Equipment & Instruments0.26%-0.04 ppElectronic Manufacturing Services0.17%+0.03 ppTechnology Distributors0.04%-0.03 ppInternet Services & Infrastructure0.12%-0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.59%+0.092 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.59%
Industry change · 12M
+0.09 pp
Semiconductor Materials & Equipment · contribution
+0.092 pp
Company participation
75%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Aug 2025 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$126.8bn0.263%+0.029 pp+0.237 pp+23.4%Yes
Applied Materials →
AMAT
United States$128.1bn0.265%-0.020 pp-0.127 pp-17.7%No
Teradyne →
TER
United States$18.8bn0.039%+0.010 pp-0.015 pp-13.1%Yes
KLA Corporation →
KLAC
United States$11.5bn0.024%+0.001 pp-0.003 pp+7.4%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.