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 Technology34.6%+14.94 ppFinancials12.3%+4.16 ppConsumer Discretionary12.0%+4.02 ppIndustrials10.1%+2.81 ppConsumer Staples7.3%+1.96 ppCommunication Services2.7%+0.87 ppHealth Care11.2%+0.85 ppUtilities2.9%+0.76 ppReal Estate2.4%+0.60 ppEnergy2.3%+0.18 ppMaterials2.3%-31.15 pp

2 · Industry

Inside Information Technology

Semiconductors12.22%+9.11 ppSystems Software8.36%+2.20 ppTechnology Hardware, Storage & Peripherals7.10%+1.27 ppApplication Software3.35%+1.05 ppCommunications Equipment1.01%+0.47 ppIT Consulting & Other Services1.17%+0.41 ppSemiconductor Materials & Equipment0.57%+0.15 ppElectronic Components0.22%+0.12 ppInternet Services & Infrastructure0.14%+0.08 ppElectronic Equipment & Instruments0.29%+0.06 ppElectronic Manufacturing Services0.15%+0.03 ppTechnology Distributors0.05%-0.00 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.57%+0.145 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.57%
Industry change · 12M
+0.15 pp
Semiconductor Materials & Equipment · contribution
+0.145 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$103.3bn0.234%+0.014 pp+0.211 pp-12.4%Yes
Applied Materials →
AMAT
United States$125.8bn0.285%-0.002 pp-0.055 pp-26.4%No
Teradyne →
TER
United States$12.6bn0.029%-0.011 pp-0.013 pp-44.0%No
KLA Corporation →
KLAC
United States$10.0bn0.023%+0.002 pp+0.003 pp+0.6%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.