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 Technology17.3%+1.25 pp Health Care17.2%+0.52 pp Energy5.0%+0.34 pp Utilities3.4%+0.20 pp Real Estate3.4%+0.18 pp Materials2.0%-0.09 pp Communication Services3.2%-0.22 pp Consumer Discretionary6.9%-0.22 pp Consumer Staples8.8%-0.59 pp Financials17.8%-0.67 pp Industrials14.9%-0.68 pp

2 · Industry

Inside Energy

Oil & Gas Exploration & Production1.48%+0.22 pp Oil & Gas Refining & Marketing0.85%+0.12 pp Oil & Gas Equipment & Services0.76%-0.09 pp Integrated Oil & Gas1.41%+0.05 pp Oil & Gas Storage & Transportation0.54%+0.04 pp

3 · Sub-industry

Inside Oil & Gas Exploration & Production

Oil & Gas Exploration & Production1.48%+0.218 pp

Concentrated

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

View all contributions →

Oil & Gas Exploration & Production · weight

1.48%

Industry change · 12M

+0.22 pp

Oil & Gas Exploration & Production · contribution

+0.218 pp

Company participation

80%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jul 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	$83.9bn	0.489%	+0.016 pp	+0.088 pp	+24.4%	Yes
EOG Resources → EOG	United States	$74.6bn	0.435%	+0.015 pp	+0.056 pp	+12.5%	Yes
Occidental Petroleum → OXY	United States	$64.3bn	0.375%	+0.012 pp	+0.048 pp	+14.3%	Yes
Devon Energy → DVN	United States	$23.6bn	0.137%	+0.020 pp	+0.013 pp	+9.2%	Yes
EQT Corporation → EQT	United States	$7.1bn	0.042%	-0.003 pp	+0.012 pp	-8.4%	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.