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›Energy›Oil & Gas Exploration & Production›Oil & Gas Exploration & Production

1 · Sector

Weight and 12M allocation change

Information Technology17.0%+0.98 pp Energy5.1%+0.38 pp Utilities3.4%+0.28 pp Real Estate3.4%+0.12 pp Health Care16.8%+0.09 pp Consumer Discretionary7.1%+0.05 pp Materials2.1%-0.04 pp Communication Services3.3%-0.22 pp Financials18.2%-0.27 pp Industrials15.0%-0.59 pp Consumer Staples8.6%-0.79 pp

2 · Industry

Inside Energy

Oil & Gas Exploration & Production1.42%+0.16 pp Integrated Oil & Gas1.47%+0.11 pp Oil & Gas Refining & Marketing0.83%+0.10 pp Oil & Gas Equipment & Services0.87%+0.02 pp Oil & Gas Storage & Transportation0.50%-0.01 pp

3 · Sub-industry

Inside Oil & Gas Exploration & Production

Oil & Gas Exploration & Production1.42%+0.157 pp

Concentrated

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

View all contributions →

Oil & Gas Exploration & Production · weight

1.42%

Industry change · 12M

+0.16 pp

Oil & Gas Exploration & Production · contribution

+0.157 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Apr 2018 · 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
ConocoPhillips → COP	United States	$76.9bn	0.473%	+0.072 pp	+0.072 pp	+12.0%	Yes
EOG Resources → EOG	United States	$68.4bn	0.420%	+0.041 pp	+0.041 pp	+2.9%	Yes
Occidental Petroleum → OXY	United States	$59.1bn	0.363%	+0.036 pp	+0.036 pp	+4.3%	Yes
EQT Corporation → EQT	United States	$7.2bn	0.044%	+0.015 pp	+0.015 pp	-7.5%	Yes
Devon Energy → DVN	United States	$19.1bn	0.117%	-0.007 pp	-0.007 pp	-12.0%	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.