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 Technology32.5%+4.21 pp Financials12.6%+0.68 pp Utilities2.9%+0.21 pp Communication Services2.8%+0.07 pp Consumer Staples7.3%-0.17 pp Real Estate2.5%-0.21 pp Energy2.8%-0.42 pp Materials2.4%-0.51 pp Consumer Discretionary11.4%-0.59 pp Industrials9.8%-0.82 pp Health Care12.9%-2.46 pp

2 · Industry

Inside Information Technology

Semiconductors10.38%+6.07 pp Systems Software7.19%-1.88 pp Application Software3.16%-0.61 pp Technology Hardware, Storage & Peripherals8.20%+0.59 pp Communications Equipment1.02%+0.21 pp IT Consulting & Other Services1.19%-0.12 pp Electronic Components0.19%+0.06 pp Internet Services & Infrastructure0.15%+0.05 pp Technology Distributors0.05%-0.04 pp Electronic Equipment & Instruments0.30%-0.04 pp Electronic Manufacturing Services0.14%-0.04 pp Semiconductor Materials & Equipment0.55%-0.03 pp

3 · Sub-industry

Inside Semiconductor Materials & Equipment

Semiconductor Materials & Equipment0.55%-0.030 pp

Concentrated

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

View all contributions →

Semiconductor Materials & Equipment · weight

0.55%

Industry change · 12M

-0.03 pp

Semiconductor Materials & Equipment · contribution

-0.030 pp

Company participation

50%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Mar 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
Applied Materials → AMAT	United States	$117.9bn	0.280%	-0.020 pp	-0.195 pp	-29.0%	No
Lam Research → LRCX	United States	$93.3bn	0.222%	+0.011 pp	+0.186 pp	-24.3%	Yes
Teradyne → TER	United States	$13.4bn	0.032%	-0.015 pp	-0.016 pp	-26.5%	No
KLA Corporation → KLAC	United States	$9.0bn	0.021%	+0.002 pp	-0.005 pp	-1.8%	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.