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 Technology36.4%+15.47 ppFinancials12.3%+4.20 ppConsumer Discretionary11.6%+3.35 ppIndustrials9.9%+2.86 ppConsumer Staples6.8%+1.56 ppCommunication Services2.7%+0.86 ppUtilities2.7%+0.78 ppHealth Care10.9%+0.56 ppReal Estate2.3%+0.49 ppEnergy2.3%+0.23 ppMaterials2.2%-30.36 pp

2 · Industry

Inside Information Technology

Semiconductors13.54%+10.43 ppSystems Software8.64%+2.13 ppApplication Software3.56%+0.95 ppTechnology Hardware, Storage & Peripherals6.94%+0.63 ppCommunications Equipment1.06%+0.51 ppIT Consulting & Other Services1.15%+0.36 ppSemiconductor Materials & Equipment0.64%+0.19 ppElectronic Components0.23%+0.13 ppElectronic Equipment & Instruments0.28%+0.06 ppElectronic Manufacturing Services0.16%+0.05 ppInternet Services & Infrastructure0.14%+0.04 ppTechnology Distributors0.05%-0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.64%+0.185 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.64%
Industry change · 12M
+0.19 pp
Semiconductor Materials & Equipment · contribution
+0.185 pp
Company participation
75%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Lam Research →
LRCX
United States$124.5bn0.268%+0.047 pp+0.242 pp-7.5%Yes
Applied Materials →
AMAT
United States$146.9bn0.317%+0.037 pp-0.049 pp-21.7%Yes
Teradyne →
TER
United States$14.4bn0.031%-0.001 pp-0.012 pp-39.1%No
KLA Corporation →
KLAC
United States$11.8bn0.026%+0.004 pp+0.005 pp+9.6%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.