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

Materials27.4%+25.10 pp Energy2.1%-0.32 pp Communication Services2.0%-0.81 pp Utilities2.0%-0.92 pp Real Estate1.6%-0.95 pp Industrials7.6%-2.27 pp Consumer Discretionary8.9%-2.59 pp Consumer Staples4.7%-2.85 pp Financials7.8%-4.44 pp Information Technology28.4%-4.69 pp Health Care7.4%-5.25 pp

2 · Industry

Inside Information Technology

Systems Software4.57%-3.11 pp Semiconductors12.72%+2.06 pp Technology Hardware, Storage & Peripherals6.16%-1.79 pp Application Software1.58%-1.68 pp IT Consulting & Other Services0.50%-0.67 pp Semiconductor Materials & Equipment1.01%+0.44 pp Electronic Components0.40%+0.19 pp Electronic Equipment & Instruments0.19%-0.10 pp Internet Services & Infrastructure0.07%-0.09 pp Communications Equipment1.10%+0.08 pp Technology Distributors0.02%-0.03 pp Electronic Manufacturing Services0.13%-0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment1.01%+0.441 pp

Concentrated

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

View all contributions →

Semiconductor Materials & Equipment · weight

1.01%

Industry change · 12M

+0.44 pp

Semiconductor Materials & Equipment · contribution

+0.441 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Apr 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
Lam Research → LRCX	United States	$322.5bn	0.438%	-0.120 pp	+0.217 pp	+262.4%	Yes
Applied Materials → AMAT	United States	$313.1bn	0.425%	-0.064 pp	+0.131 pp	+164.1%	Yes
Teradyne → TER	United States	$53.8bn	0.073%	+0.001 pp	+0.044 pp	+364.6%	Yes
Qnity Electronics → Q	United States	$29.5bn	0.040%	+0.001 pp	+0.040 pp	+0.0%	Yes
KLA Corporation → KLAC	United States	$22.9bn	0.031%	-0.005 pp	+0.009 pp	+151.0%	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.