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 Technology37.5%+17.67 pp Financials12.1%+3.93 pp Consumer Discretionary11.7%+3.50 pp Industrials10.0%+2.95 pp Consumer Staples6.5%+1.39 pp Utilities2.8%+0.81 pp Communication Services2.5%+0.68 pp Real Estate2.3%+0.39 pp Energy2.3%+0.30 pp Health Care10.3%+0.23 pp Materials2.1%-31.86 pp

2 · Industry

Inside Energy

Oil & Gas Storage & Transportation0.47%+0.15 pp Oil & Gas Exploration & Production0.77%+0.15 pp Integrated Oil & Gas0.56%+0.03 pp Oil & Gas Equipment & Services0.23%-0.02 pp Oil & Gas Refining & Marketing0.31%-0.01 pp

3 · Sub-industry

Inside Oil & Gas Storage & Transportation

Oil & Gas Storage & Transportation0.47%+0.151 pp

Concentrated

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

View all contributions →

Oil & Gas Storage & Transportation · weight

0.47%

Industry change · 12M

+0.15 pp

Oil & Gas Storage & Transportation · contribution

+0.151 pp

Company participation

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jul 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	$73.2bn	0.154%	-0.017 pp	+0.061 pp	+44.8%	No
Kinder Morgan → KMI	United States	$62.4bn	0.131%	-0.009 pp	+0.047 pp	+38.7%	No
Targa Resources → TRGP	United States	$36.1bn	0.076%	-0.013 pp	+0.022 pp	+25.5%	No
Oneok → OKE	United States	$51.3bn	0.108%	-0.015 pp	+0.021 pp	+3.1%	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.