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 Refining & Marketing›Oil & Gas Refining & Marketing

1 · Sector

Weight and 12M allocation change

Information Technology39.9%+2.38 pp Energy2.7%+0.38 pp Health Care10.6%+0.37 pp Materials2.0%-0.11 pp Industrials9.9%-0.12 pp Real Estate2.1%-0.17 pp Communication Services2.2%-0.23 pp Utilities2.5%-0.34 pp Consumer Discretionary11.3%-0.38 pp Consumer Staples5.9%-0.60 pp Financials10.9%-1.19 pp

2 · Industry

Inside Energy

Oil & Gas Refining & Marketing0.47%+0.16 pp Integrated Oil & Gas0.68%+0.13 pp Oil & Gas Equipment & Services0.28%+0.05 pp Oil & Gas Exploration & Production0.81%+0.04 pp Oil & Gas Storage & Transportation0.48%+0.01 pp

3 · Sub-industry

Inside Oil & Gas Refining & Marketing

Oil & Gas Refining & Marketing0.47%+0.161 pp

Concentrated

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

View all contributions →

Oil & Gas Refining & Marketing · weight

0.47%

Industry change · 12M

+0.16 pp

Oil & Gas Refining & Marketing · contribution

+0.161 pp

Company participation

100%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jul 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
Valero Energy → VLO	United States	$90.1bn	0.157%	+0.056 pp	+0.067 pp	+132.7%	Yes
Marathon Petroleum → MPC	United States	$92.4bn	0.161%	+0.062 pp	+0.051 pp	+89.6%	Yes
Phillips 66 → PSX	United States	$84.9bn	0.148%	+0.051 pp	+0.043 pp	+77.2%	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.