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 Technology33.6%+3.90 ppConsumer Discretionary13.1%+1.27 ppFinancials12.6%+0.85 ppConsumer Staples6.8%+0.07 ppUtilities2.6%-0.07 ppCommunication Services2.5%-0.41 ppReal Estate2.3%-0.46 ppMaterials2.3%-0.48 ppIndustrials9.6%-0.62 ppEnergy2.5%-0.66 ppHealth Care12.2%-3.40 pp

2 · Industry

Inside Information Technology

Semiconductors11.08%+7.06 ppSystems Software7.30%-1.93 ppTechnology Hardware, Storage & Peripherals8.15%-0.66 ppApplication Software3.47%-0.48 ppIT Consulting & Other Services1.26%-0.15 ppSemiconductor Materials & Equipment0.62%+0.12 ppElectronic Components0.19%+0.07 ppElectronic Equipment & Instruments0.30%-0.04 ppElectronic Manufacturing Services0.14%-0.04 ppTechnology Distributors0.06%-0.03 ppInternet Services & Infrastructure0.15%+0.03 ppCommunications Equipment0.83%-0.03 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.62%+0.115 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.62%
Industry change · 12M
+0.12 pp
Semiconductor Materials & Equipment · contribution
+0.115 pp
Company participation
25%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$104.0bn0.231%+0.006 pp+0.199 pp-0.8%Yes
Applied Materials →
AMAT
United States$146.7bn0.326%-0.026 pp-0.080 pp+10.6%No
KLA Corporation →
KLAC
United States$9.8bn0.022%+0.001 pp-0.002 pp+25.4%No
Teradyne →
TER
United States$18.9bn0.042%+0.001 pp-0.002 pp+20.4%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.