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 Storage & Transportation›Oil & Gas Storage & Transportation

1 · Sector

Weight and 12M allocation change

Information Technology34.6%+14.94 pp Financials12.3%+4.16 pp Consumer Discretionary12.0%+4.02 pp Industrials10.1%+2.81 pp Consumer Staples7.3%+1.96 pp Communication Services2.7%+0.87 pp Health Care11.2%+0.85 pp Utilities2.9%+0.76 pp Real Estate2.4%+0.60 pp Energy2.3%+0.18 pp Materials2.3%-31.15 pp

2 · Industry

Inside Energy

Oil & Gas Storage & Transportation0.50%+0.18 pp Oil & Gas Exploration & Production0.77%+0.09 pp Integrated Oil & Gas0.54%-0.03 pp Oil & Gas Equipment & Services0.22%-0.03 pp Oil & Gas Refining & Marketing0.31%-0.02 pp

3 · Sub-industry

Inside Oil & Gas Storage & Transportation

Oil & Gas Storage & Transportation0.50%+0.181 pp

Concentrated

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

View all contributions →

Oil & Gas Storage & Transportation · weight

0.50%

Industry change · 12M

+0.18 pp

Oil & Gas Storage & Transportation · contribution

+0.181 pp

Company participation

50%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

May 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
Williams Companies → WMB	United States	$73.9bn	0.167%	+0.009 pp	+0.071 pp	+51.7%	Yes
Kinder Morgan → KMI	United States	$62.3bn	0.141%	+0.007 pp	+0.058 pp	+50.7%	Yes
Targa Resources → TRGP	United States	$34.3bn	0.078%	-0.021 pp	+0.028 pp	+36.2%	No
Oneok → OKE	United States	$50.5bn	0.114%	-0.026 pp	+0.024 pp	+4.4%	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.