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 Technology35.4%+6.08 ppFinancials12.0%+0.50 ppConsumer Discretionary12.8%+0.34 ppConsumer Staples6.7%+0.10 ppUtilities2.6%-0.18 ppCommunication Services2.5%-0.30 ppReal Estate2.3%-0.61 ppMaterials2.2%-0.64 ppEnergy2.4%-0.74 ppIndustrials9.3%-1.06 ppHealth Care11.7%-3.51 pp

2 · Industry

Inside Information Technology

Semiconductors12.18%+8.17 ppSystems Software7.54%-1.19 ppTechnology Hardware, Storage & Peripherals8.85%-0.38 ppApplication Software3.51%-0.29 ppIT Consulting & Other Services1.14%-0.19 ppElectronic Equipment & Instruments0.28%-0.08 ppSemiconductor Materials & Equipment0.58%+0.07 ppElectronic Components0.19%+0.07 ppElectronic Manufacturing Services0.13%-0.05 ppTechnology Distributors0.05%-0.04 ppCommunications Equipment0.82%-0.03 ppInternet Services & Infrastructure0.14%+0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.58%+0.071 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.58%
Industry change · 12M
+0.07 pp
Semiconductor Materials & Equipment · contribution
+0.071 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Dec 2024 · sorted by absolute contribution to 12-month change

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$92.9bn0.211%+0.186 pp+0.180 pp-6.8%Yes
Applied Materials →
AMAT
United States$132.3bn0.300%-0.088 pp-0.102 pp+1.1%No
KLA Corporation →
KLAC
United States$8.4bn0.019%-0.005 pp-0.004 pp+9.4%No
Teradyne →
TER
United States$20.5bn0.047%-0.004 pp-0.003 pp+16.5%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.