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 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 Energy

Oil & Gas Refining & Marketing0.33%-0.23 pp Oil & Gas Storage & Transportation0.57%+0.13 pp Integrated Oil & Gas0.70%-0.11 pp Oil & Gas Equipment & Services0.29%-0.11 pp Oil & Gas Exploration & Production0.94%-0.10 pp

3 · Sub-industry

Inside Oil & Gas Refining & Marketing

Oil & Gas Refining & Marketing0.33%-0.227 pp

Concentrated

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

View all contributions →

Oil & Gas Refining & Marketing · weight

0.33%

Industry change · 12M

-0.23 pp

Oil & Gas Refining & Marketing · contribution

-0.227 pp

Company participation

100%

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
Marathon Petroleum → MPC	United States	$45.5bn	0.108%	+0.006 pp	-0.094 pp	-26.2%	Yes
Phillips 66 → PSX	United States	$50.3bn	0.120%	+0.013 pp	-0.074 pp	-21.8%	Yes
Valero Energy → VLO	United States	$41.6bn	0.099%	+0.011 pp	-0.059 pp	-20.3%	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.