The Dell story isn't over and comparison over a 5 year period probably isn't long enough to illuminate whether or not Michael Dell's investment beat the S&P-500

The Dell story isn't over and comparison over a 5 year period probably isn't long enough to illuminate whether or not Michael Dell's investment beat the S&P-500. If Dell as a public company outperforms the S&P-500 going forward (which is not outside the realm of possibility), the 10 year return (or even the 6 year return!) could significantly outperform the market. You're calling it too soon.