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 Technology38.1%+4.07 pp Utilities2.8%-0.02 pp Consumer Discretionary12.0%-0.02 pp Energy2.3%-0.32 pp Materials2.1%-0.33 pp Real Estate2.1%-0.38 pp Industrials9.4%-0.40 pp Communication Services2.2%-0.48 pp Health Care11.5%-0.58 pp Consumer Staples6.2%-0.72 pp Financials11.4%-0.82 pp

2 · Industry

Inside Information Technology

Semiconductors15.05%+3.50 pp Application Software2.91%-0.61 pp Technology Hardware, Storage & Peripherals8.57%+0.37 pp Systems Software7.72%+0.34 pp Semiconductor Materials & Equipment0.90%+0.31 pp Communications Equipment1.07%+0.26 pp IT Consulting & Other Services0.99%-0.16 pp Electronic Components0.31%+0.12 pp Electronic Equipment & Instruments0.23%-0.06 pp Electronic Manufacturing Services0.17%+0.04 pp Internet Services & Infrastructure0.11%-0.03 pp Technology Distributors0.04%-0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.90%+0.313 pp

Concentrated

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

View all contributions →

Semiconductor Materials & Equipment · weight

0.90%

Industry change · 12M

+0.31 pp

Semiconductor Materials & Equipment · contribution

+0.313 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Nov 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	$195.9bn	0.385%	+0.122 pp	+0.175 pp	+113.4%	Yes
Applied Materials → AMAT	United States	$201.0bn	0.395%	+0.129 pp	+0.077 pp	+45.8%	Yes
Qnity Electronics → Q	United States	$17.0bn	0.033%	+0.033 pp	+0.033 pp	+0.0%	Yes
Teradyne → TER	United States	$28.5bn	0.056%	+0.017 pp	+0.016 pp	+66.1%	Yes
KLA Corporation → KLAC	United States	$15.4bn	0.030%	+0.006 pp	+0.011 pp	+83.2%	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.