Longtime Growth Portfolio Holding MDU Resources (NYSE: MDU) has generated an average total return of more than 8 percent a year for the past 10 years.

A charter member of the UF Portfolio, this month's Growth Spotlight has generated a total return of more than 500 percent since April 1989.

Whether its cross-border pipeline gets built or not TransCanada Corp (TSX: TRP, NYSE: TRP) is poised to build wealth for investors with fee-generating assets for years to come.

Its attempt to rescue Deutsche Telekom AG's (Germany: DTE, OTC: DTEGY) languishing T-Mobile USA business was not successful, but this company will remain one of two key players in what is perhaps America's most dynamic industry.

California's requirement that regulated utilities double their renewable energy use by 2020 is good news for Growth Spotlight Sempra Energy (NYSE: SRE).

New Growth Portfolio Aggressive Holding AES Corp (NYSE: AES) will begin paying a dividend in the fourth quarter of 2012.

Dominion Resources (NYSE: D) responded with typical quickness and competence to damage done by Hurricane Irene. Reliability is the key to its low-risk, long-term growth.

A combination of factors has held Exelon Corp's (NYSE: EXC) share price down in recent months. It's poised to bounce with authority, on the strength of solid second-quarter earnings.

Aqua America (NYSE: WTR) has generated a four-figure compound return over the last 20 years. Steady leadership and low-cost capital are helping the company solidify its wealth-building base for coming decades.