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 Technology33.1%+5.29 ppFinancials12.3%+0.37 ppCommunication Services2.8%+0.09 ppUtilities2.9%+0.07 ppReal Estate2.5%-0.09 ppConsumer Staples7.6%-0.20 ppMaterials2.3%-0.53 ppConsumer Discretionary11.5%-0.54 ppEnergy2.4%-0.88 ppIndustrials9.9%-0.92 ppHealth Care12.6%-2.65 pp

2 · Industry

Inside Information Technology

Semiconductors10.66%+6.47 ppSystems Software7.68%-1.10 ppApplication Software3.26%-0.33 ppCommunications Equipment1.01%+0.21 ppElectronic Components0.20%+0.07 ppInternet Services & Infrastructure0.16%+0.06 ppTechnology Hardware, Storage & Peripherals7.95%+0.06 ppElectronic Equipment & Instruments0.29%-0.04 ppTechnology Distributors0.05%-0.04 ppSemiconductor Materials & Equipment0.57%-0.02 ppElectronic Manufacturing Services0.14%-0.02 ppIT Consulting & Other Services1.16%-0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.57%-0.025 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.57%
Industry change · 12M
-0.02 pp
Semiconductor Materials & Equipment · contribution
-0.025 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$91.7bn0.220%-0.011 pp+0.186 pp-19.0%Yes
Applied Materials →
AMAT
United States$122.4bn0.294%-0.032 pp-0.184 pp-23.5%No
Teradyne →
TER
United States$12.0bn0.029%-0.013 pp-0.023 pp-35.9%No
KLA Corporation →
KLAC
United States$9.3bn0.022%+0.001 pp-0.004 pp+2.9%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.