hiː ˈɔːlsoʊ ɪnvˈɛstᵻd ɪn ɐ nˈʌmbɚɹ ʌv ˈʌðɚɹ ˈɛnɚdʒi kˈʌmpəniz, ɪŋklˈuːdɪŋ pˈɛnzɔɪl ænd dˈaɪəmənd ˈɔfʃoːɹ dɹˈɪlɪŋ, ænd dʒˈɛnɚɹˌeɪɾᵻd sɪɡnˈɪfɪkənt ɹᵻtˈɜːnz fɔːɹ hɪz ɪnvˈɛstɚz.
He also invested in a number of other energy companies, including Pennzoil and Diamond Offshore Drilling, and generated significant returns for his investors.