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 Technology29.7%+2.54 ppHealth Care16.7%+0.60 ppEnergy2.3%+0.44 ppReal Estate3.4%+0.43 ppConsumer Discretionary7.8%+0.36 ppUtilities3.1%+0.17 ppMaterials3.3%+0.15 ppFinancials12.9%-0.47 ppConsumer Staples7.2%-0.68 ppCommunication Services3.6%-1.42 ppIndustrials10.0%-2.13 pp

2 · Industry

Inside Information Technology

Systems Software8.26%+1.30 ppSemiconductors3.90%+0.48 ppTechnology Hardware, Storage & Peripherals9.72%+0.23 ppSemiconductor Materials & Equipment0.59%+0.14 ppCommunications Equipment1.06%+0.13 ppIT Consulting & Other Services1.47%+0.12 ppApplication Software3.73%+0.10 ppElectronic Equipment & Instruments0.45%+0.03 ppInternet Services & Infrastructure0.15%-0.02 ppTechnology Distributors0.09%+0.01 ppElectronic Components0.14%+0.01 ppElectronic Manufacturing Services0.17%+0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.59%+0.143 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
+0.14 pp
Semiconductor Materials & Equipment · contribution
+0.143 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Dec 2021 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$139.8bn0.448%+0.040 pp+0.129 pp+83.6%Yes
Lam Research →
LRCX
United States$10.1bn0.032%+0.004 pp+0.005 pp+53.7%Yes
Teradyne →
TER
United States$26.7bn0.085%+0.022 pp+0.005 pp+36.8%Yes
KLA Corporation →
KLAC
United States$6.5bn0.021%+0.003 pp+0.005 pp+68.0%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.