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

Materials30.1%+27.83 pp Energy2.0%-0.58 pp Communication Services2.1%-0.59 pp Utilities2.1%-0.66 pp Real Estate1.6%-0.88 pp Industrials7.7%-1.89 pp Consumer Staples4.9%-2.28 pp Consumer Discretionary8.4%-3.45 pp Health Care8.2%-4.24 pp Financials7.7%-4.88 pp Information Technology25.3%-8.39 pp

2 · Industry

Inside Information Technology

Systems Software4.46%-2.74 pp Technology Hardware, Storage & Peripherals5.82%-2.61 pp Application Software1.57%-1.73 pp Semiconductors10.39%-0.75 pp IT Consulting & Other Services0.55%-0.65 pp Semiconductor Materials & Equipment0.94%+0.37 pp Communications Equipment0.86%-0.18 pp Electronic Components0.30%+0.11 pp Electronic Equipment & Instruments0.18%-0.11 pp Internet Services & Infrastructure0.06%-0.07 pp Technology Distributors0.02%-0.03 pp Electronic Manufacturing Services0.13%-0.01 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.94%+0.371 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

+0.371 pp

Company participation

60%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Feb 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	$292.1bn	0.401%	+0.016 pp	+0.181 pp	+207.6%	No
Applied Materials → AMAT	United States	$295.5bn	0.406%	+0.011 pp	+0.118 pp	+137.6%	Yes
Qnity Electronics → Q	United States	$26.6bn	0.036%	+0.003 pp	+0.036 pp	+0.0%	Yes
Teradyne → TER	United States	$50.1bn	0.069%	+0.013 pp	+0.029 pp	+192.4%	Yes
KLA Corporation → KLAC	United States	$20.0bn	0.027%	-0.003 pp	+0.006 pp	+116.7%	No

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.