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 Technology36.4%+15.47 pp Financials12.3%+4.20 pp Consumer Discretionary11.6%+3.35 pp Industrials9.9%+2.86 pp Consumer Staples6.8%+1.56 pp Communication Services2.7%+0.86 pp Utilities2.7%+0.78 pp Health Care10.9%+0.56 pp Real Estate2.3%+0.49 pp Energy2.3%+0.23 pp Materials2.2%-30.36 pp

2 · Industry

Inside Energy

Oil & Gas Storage & Transportation0.50%+0.18 pp Oil & Gas Exploration & Production0.77%+0.11 pp Oil & Gas Equipment & Services0.22%-0.03 pp Oil & Gas Refining & Marketing0.31%-0.02 pp Integrated Oil & Gas0.54%-0.00 pp

3 · Sub-industry

Inside Oil & Gas Storage & Transportation

Oil & Gas Storage & Transportation0.50%+0.175 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

+0.175 pp

Company participation

50%

of industry constituents above their 6M weight average

4 · Companies driving this sub-industry

Jun 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	$76.7bn	0.165%	-0.008 pp	+0.068 pp	+53.3%	Yes
Kinder Morgan → KMI	United States	$65.3bn	0.141%	-0.010 pp	+0.058 pp	+55.0%	Yes
Targa Resources → TRGP	United States	$37.8bn	0.081%	-0.022 pp	+0.028 pp	+37.8%	No
Oneok → OKE	United States	$51.0bn	0.110%	-0.037 pp	+0.021 pp	+4.7%	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.