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%+5.20 ppConsumer Discretionary11.9%+0.62 ppIndustrials10.2%+0.09 ppCommunication Services2.9%-0.50 ppReal Estate2.8%-0.52 ppMaterials2.7%-0.53 ppUtilities2.7%-0.66 ppConsumer Staples6.7%-0.73 ppEnergy3.1%-0.73 ppFinancials11.7%-0.96 ppHealth Care15.6%-1.28 pp

2 · Industry

Inside Information Technology

Systems Software9.23%+2.66 ppApplication Software3.96%+0.91 ppSemiconductors4.03%+0.77 ppTechnology Hardware, Storage & Peripherals8.82%+0.66 ppIT Consulting & Other Services1.41%+0.17 ppSemiconductor Materials & Equipment0.51%+0.09 ppElectronic Equipment & Instruments0.35%-0.04 ppElectronic Manufacturing Services0.18%+0.04 ppCommunications Equipment0.86%-0.04 ppElectronic Components0.13%-0.01 ppInternet Services & Infrastructure0.12%-0.01 ppTechnology Distributors0.09%-0.00 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.51%+0.088 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
+0.09 pp
Semiconductor Materials & Equipment · contribution
+0.088 pp
Company participation
75%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$136.5bn0.406%+0.030 pp+0.084 pp+48.7%Yes
Teradyne →
TER
United States$14.8bn0.044%+0.000 pp-0.010 pp-4.6%No
Lam Research →
LRCX
United States$10.8bn0.032%+0.006 pp+0.009 pp+67.0%Yes
KLA Corporation →
KLAC
United States$8.0bn0.024%+0.002 pp+0.005 pp+53.2%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.