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 Technology41.0%+4.61 pp Industrials10.3%+0.34 pp Energy2.4%+0.09 pp Materials2.1%-0.14 pp Utilities2.5%-0.22 pp Real Estate2.0%-0.28 pp Consumer Discretionary11.2%-0.41 pp Health Care10.4%-0.48 pp Communication Services2.2%-0.51 pp Consumer Staples5.7%-1.01 pp Financials10.3%-1.99 pp

2 · Industry

Inside Information Technology

Semiconductors18.72%+5.18 pp Systems Software5.78%-2.86 pp Technology Hardware, Storage & Peripherals8.95%+2.01 pp Application Software1.78%-1.78 pp Semiconductor Materials & Equipment2.20%+1.56 pp Communications Equipment1.57%+0.52 pp IT Consulting & Other Services0.64%-0.51 pp Electronic Components0.70%+0.48 pp Electronic Manufacturing Services0.28%+0.12 pp Internet Services & Infrastructure0.09%-0.05 pp Electronic Equipment & Instruments0.24%-0.04 pp Technology Distributors0.03%-0.02 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment2.20%+1.557 pp

Concentrated

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

View all contributions →

Semiconductor Materials & Equipment · weight

2.20%

Industry change · 12M

+1.56 pp

Semiconductor Materials & Equipment · contribution

+1.557 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jun 2026 · 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
Applied Materials → AMAT	United States	$574.0bn	0.997%	+0.602 pp	+0.681 pp	+297.8%	Yes
Lam Research → LRCX	United States	$541.9bn	0.942%	+0.553 pp	+0.673 pp	+347.6%	Yes
Teradyne → TER	United States	$75.7bn	0.132%	+0.064 pp	+0.101 pp	+439.5%	Yes
Qnity Electronics → Q	United States	$34.2bn	0.059%	+0.024 pp	+0.059 pp	+0.0%	Yes
KLA Corporation → KLAC	United States	$39.4bn	0.068%	+0.040 pp	+0.043 pp	+239.0%	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.