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 Technology33.7%+4.42 ppFinancials12.6%+1.00 ppConsumer Staples7.2%+0.57 ppUtilities2.7%+0.11 ppCommunication Services2.7%-0.04 ppReal Estate2.5%-0.34 ppEnergy2.6%-0.50 ppMaterials2.3%-0.52 ppConsumer Discretionary11.8%-0.67 ppIndustrials9.5%-0.95 ppHealth Care12.4%-3.07 pp

2 · Industry

Inside Information Technology

Semiconductors11.14%+6.88 ppSystems Software7.19%-2.04 ppApplication Software3.31%-0.58 ppCommunications Equipment1.03%+0.22 ppTechnology Hardware, Storage & Peripherals8.43%+0.20 ppIT Consulting & Other Services1.20%-0.19 ppElectronic Components0.19%+0.06 ppElectronic Equipment & Instruments0.29%-0.05 ppTechnology Distributors0.05%-0.04 ppElectronic Manufacturing Services0.14%-0.04 ppInternet Services & Infrastructure0.13%+0.03 ppSemiconductor Materials & Equipment0.57%-0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.57%-0.019 pp
Concentrated

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

View all contributions →
Semiconductor Materials & Equipment · weight
0.57%
Industry change · 12M
-0.02 pp
Semiconductor Materials & Equipment · contribution
-0.019 pp
Company participation
50%
of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

CompanyCountryMarket capUniverse weight3M contribution12M contribution12M price returnAbove 6M weight average
Applied Materials →
AMAT
United States$128.4bn0.287%-0.031 pp-0.193 pp-20.9%No
Lam Research →
LRCX
United States$98.5bn0.220%+0.011 pp+0.185 pp-17.4%Yes
Teradyne →
TER
United States$17.8bn0.040%+0.000 pp-0.006 pp+6.5%No
KLA Corporation →
KLAC
United States$9.4bn0.021%+0.002 pp-0.005 pp+4.8%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.