A look back at the stock market's dominant companies in 1995 shows just how much has changed in the past three decades.The stock market's biggest companies looked very different 30 years ago. On Dec. 29, 1995, the top three names were ExxonMobil with a market cap of $101 billion, Coca-Cola at$93 billion, and General Electric at $74 billion.While all three of these companies are still large-cap stocks in their existing forms, the S&P 500 index has outperformed them by a wide margin over the past 30 years, a ...