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 Technology37.8%+2.39 pp Industrials9.6%+0.25 pp Materials2.2%+0.06 pp Utilities2.6%-0.01 pp Financials11.9%-0.11 pp Energy2.3%-0.17 pp Real Estate2.1%-0.28 pp Communication Services2.2%-0.31 pp Health Care11.3%-0.33 pp Consumer Staples6.0%-0.70 pp Consumer Discretionary12.0%-0.78 pp

2 · Industry

Inside Information Technology

Semiconductors15.05%+2.87 pp Application Software2.98%-0.53 pp Technology Hardware, Storage & Peripherals8.35%-0.51 pp Semiconductor Materials & Equipment0.94%+0.37 pp Communications Equipment1.07%+0.25 pp IT Consulting & Other Services0.99%-0.15 pp Electronic Components0.31%+0.12 pp Electronic Equipment & Instruments0.23%-0.05 pp Electronic Manufacturing Services0.18%+0.05 pp Internet Services & Infrastructure0.10%-0.04 pp Technology Distributors0.03%-0.02 pp Systems Software7.56%+0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.94%+0.368 pp

Concentrated

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

View all contributions →

Semiconductor Materials & Equipment · weight

0.94%

Industry change · 12M

+0.37 pp

Semiconductor Materials & Equipment · contribution

+0.368 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

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

Company	Country	Market cap	Universe weight	3M contribution	12M contribution	12M price return	Above 6M weight average
Lam Research → LRCX	United States	$215.0bn	0.421%	+0.082 pp	+0.210 pp	+139.2%	Yes
Applied Materials → AMAT	United States	$203.8bn	0.399%	+0.073 pp	+0.099 pp	+59.6%	Yes
Qnity Electronics → Q	United States	$17.1bn	0.033%	+0.033 pp	+0.033 pp	+0.0%	Yes
Teradyne → TER	United States	$30.3bn	0.059%	+0.016 pp	+0.013 pp	+54.4%	Yes
KLA Corporation → KLAC	United States	$16.0bn	0.031%	+0.003 pp	+0.012 pp	+94.5%	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.