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 Technology29.3%+5.56 ppConsumer Discretionary12.4%+2.29 ppIndustrials10.4%-0.00 ppReal Estate2.9%-0.24 ppMaterials2.8%-0.35 ppCommunication Services2.8%-0.37 ppEnergy3.2%-0.82 ppUtilities2.8%-0.82 ppFinancials11.5%-0.88 ppConsumer Staples6.6%-1.31 ppHealth Care15.2%-3.03 pp

2 · Industry

Inside Information Technology

Systems Software8.74%+2.04 ppTechnology Hardware, Storage & Peripherals9.23%+1.49 ppSemiconductors4.01%+0.98 ppApplication Software3.81%+0.95 ppSemiconductor Materials & Equipment0.51%+0.12 ppCommunications Equipment0.85%-0.07 ppIT Consulting & Other Services1.33%+0.05 ppElectronic Manufacturing Services0.18%+0.05 ppElectronic Equipment & Instruments0.36%-0.03 ppElectronic Components0.12%-0.02 ppInternet Services & Infrastructure0.12%-0.01 ppTechnology Distributors0.09%+0.00 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.51%+0.120 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.51%
Industry change · 12M
+0.12 pp
Semiconductor Materials & Equipment · contribution
+0.120 pp
Company participation
100%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Dec 2023 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$134.7bn0.402%+0.015 pp+0.105 pp+68.0%Yes
Lam Research →
LRCX
United States$10.3bn0.031%+0.003 pp+0.010 pp+88.6%Yes
KLA Corporation →
KLAC
United States$7.9bn0.024%+0.003 pp+0.004 pp+56.0%Yes
Teradyne →
TER
United States$16.6bn0.049%-0.002 pp+0.000 pp+24.8%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.