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 Technology17.6%+1.59 pp Energy5.1%+0.44 pp Utilities3.3%+0.18 pp Real Estate3.4%+0.15 pp Consumer Discretionary7.1%+0.03 pp Materials2.1%-0.02 pp Health Care16.6%-0.10 pp Communication Services3.2%-0.30 pp Industrials15.2%-0.43 pp Financials18.0%-0.50 pp Consumer Staples8.4%-1.02 pp

2 · Industry

Inside Energy

Oil & Gas Exploration & Production1.46%+0.20 pp Oil & Gas Refining & Marketing0.87%+0.14 pp Integrated Oil & Gas1.44%+0.08 pp Oil & Gas Storage & Transportation0.53%+0.02 pp Oil & Gas Equipment & Services0.84%-0.01 pp

3 · Sub-industry

Inside Oil & Gas Exploration & Production

Oil & Gas Exploration & Production1.46%+0.200 pp

Concentrated

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

View all contributions →

Oil & Gas Exploration & Production · weight

1.46%

Industry change · 12M

+0.20 pp

Oil & Gas Exploration & Production · contribution

+0.200 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 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	$78.9bn	0.478%	+0.096 pp	+0.077 pp	+15.7%	Yes
Occidental Petroleum → OXY	United States	$64.5bn	0.391%	+0.090 pp	+0.064 pp	+13.7%	Yes
EOG Resources → EOG	United States	$68.2bn	0.414%	+0.062 pp	+0.034 pp	+2.6%	Yes
EQT Corporation → EQT	United States	$7.4bn	0.045%	+0.002 pp	+0.016 pp	-5.0%	Yes
Devon Energy → DVN	United States	$21.8bn	0.132%	+0.035 pp	+0.008 pp	+0.7%	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.